Re: [Matplotlib-users] Qt4 Designer Example
On 16 April 2015 at 09:51, Benjamin Root wrote: > A little birdie has told me that someone else is writing a new > comprehensive matplotlib book (I think it would replace Sandros' book). > Last I heard from the birdie, he was most of the way done with the > manuscript. Based on my experience with the edit/review process, I would > guess 2-3 more months to see it finished and published. > > Oh cool. I'll look out for this. Will it be advertised on this list? -- BPM Camp - Free Virtual Workshop May 6th at 10am PDT/1PM EDT Develop your own process in accordance with the BPMN 2 standard Learn Process modeling best practices with Bonita BPM through live exercises http://www.bonitasoft.com/be-part-of-it/events/bpm-camp-virtual- event?utm_ source=Sourceforge_BPM_Camp_5_6_15&utm_medium=email&utm_campaign=VA_SF___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Qt4 Designer Example
That's cool. I just found the book provided the right level of detail for me to start using QtDesigner with my projects. I can't speak for PyQt5 but I don't see the concepts have changed much over the past 5 or so years. Agreed though, if you're brand new to python and are only familiar with python3 then typing in the code verbatim (python2 style) may cause you problems that frustrate the learning process. On 15 April 2015 at 19:49, Christian Ambros wrote: > No offense, but it really is outdated. Consider that it'll take two years > to do the writing and the lecture work the research material is form 2007 > to 2008. We now are in 2015. As you can tell from other books which have > been published between 2013 and a really helpy book from March, 24th 2015 > (yes, Benjamin Root wrote it), even they don't cover latest enhancements up > to six month before print, (which might be seen a reasonable since changing > is easy in a digitized world like ours). > A good tutorial for the once, who do not have much experience in this > field (I count myself in with the just one and a half year of experience in > gui programming) is two things, actual up to six month to a year and > straight forward, meaning It tells you what to do and doesn't bother you > with design thoughts, API explanations nor tries to teach you programming. > I have that book in my possession, but it didn't turn out to be helpful if > you do not have the time do read it in whole. If you have the time to spin > freely, you still will have conquered 80% by yourself and because it is > still outdated for pyhton3 and matplotlib 1.4.3 the use is questionable. > > cheers, > Christian > > -- > "A little learning never caused anyone's head to explode!" > > > "Ein wenig Lernen hat noch niemandens Kopf zum Explodieren gebracht!" > > > > On Wednesday, April 15, 2015 3:44 AM, Chris O'Halloran > wrote: > > > Can I recommend this book. It was very helpful to me in figuring much of > this out. > > > https://www.packtpub.com/application-development/matplotlib-python-developers > > On 14 April 2015 at 18:14, Christian Ambros wrote: > > Hi Ryan, > > wow! This tutorial is one of the best I ever encountered. Nothing is > missing, nothing is cryptic or unclear. What I like best is, that it get's > along without using Qt Designer plugins or something similar strange. It's > a good basis to start. Maybe you should write a book, covering all the > untold things one needs to solve problems like that. I browsed through > plenty of books the last weeks and what really is missing, is a cookbook > about Qt Designer, Glade and wxWidgets and how to fill it with python3 and > it's lib's like matplotlib, pyqtgraph, numpy, sympy etc. > > I would buy it right away! > cheers, > Christian > > -- > "A little learning never caused anyone's head to explode!" > > > "Ein wenig Lernen hat noch niemandens Kopf zum Explodieren gebracht!" > > > > On Friday, April 10, 2015 7:14 PM, Ryan Nelson > wrote: > > > Christian, > > As it turns out, I wrote a blog post (for my terrible blog) about using > Designer to create a MPL based GUI ( > http://blog.rcnelson.com/building-a-matplotlib-gui-with-qt-designer-part-1/). > I was going to write this up for the MPL docs... But it got really long (3 > parts), so I just used my personal site. It got so long because this was > the second time I needed to figure this out, and I wanted to make a very > detailed outline for my own future reference. Unfortunately, I don't have > any experience with Qt5, but I imagine things are similar. I think they > just rearranged the locations of some of the widgets, but I'd be curious to > hear your experience. I gave up on PyQtdesignerplugins. I think it makes > more sense to just use a generic widget as the MPL container. > > I would be very happy if you had comments for my Qt designer posts. > > Ryan > > On Wed, Apr 8, 2015 at 5:47 AM, Christian Ambros > wrote: > > Hi Ryan, > > could you write down, as a tutorial, how you built the example with the qt > designer? > In the last hours I read all most everything what can be found on the > issue of getting matplotlib running with pyqt5 and the designer but as you > realized yourself, there is little to be found handy. > > I'm stuck at a project, which has to use python3, and pyqt5 and am not > allowed by my boss to fall back to pyqt4 or qt_compat. He wants to make > sure that we use the latest revisions. > > So I#m very pleased to read that someone already set food on this terrain. > Qt5.4.1 is running and I installed PyQtdesingerpl
Re: [Matplotlib-users] Qt4 Designer Example
Can I recommend this book. It was very helpful to me in figuring much of this out. https://www.packtpub.com/application-development/matplotlib-python-developers On 14 April 2015 at 18:14, Christian Ambros wrote: > Hi Ryan, > > wow! This tutorial is one of the best I ever encountered. Nothing is > missing, nothing is cryptic or unclear. What I like best is, that it get's > along without using Qt Designer plugins or something similar strange. It's > a good basis to start. Maybe you should write a book, covering all the > untold things one needs to solve problems like that. I browsed through > plenty of books the last weeks and what really is missing, is a cookbook > about Qt Designer, Glade and wxWidgets and how to fill it with python3 and > it's lib's like matplotlib, pyqtgraph, numpy, sympy etc. > > I would buy it right away! > cheers, > Christian > > -- > "A little learning never caused anyone's head to explode!" > > > "Ein wenig Lernen hat noch niemandens Kopf zum Explodieren gebracht!" > > > > On Friday, April 10, 2015 7:14 PM, Ryan Nelson > wrote: > > > Christian, > > As it turns out, I wrote a blog post (for my terrible blog) about using > Designer to create a MPL based GUI ( > http://blog.rcnelson.com/building-a-matplotlib-gui-with-qt-designer-part-1/). > I was going to write this up for the MPL docs... But it got really long (3 > parts), so I just used my personal site. It got so long because this was > the second time I needed to figure this out, and I wanted to make a very > detailed outline for my own future reference. Unfortunately, I don't have > any experience with Qt5, but I imagine things are similar. I think they > just rearranged the locations of some of the widgets, but I'd be curious to > hear your experience. I gave up on PyQtdesignerplugins. I think it makes > more sense to just use a generic widget as the MPL container. > > I would be very happy if you had comments for my Qt designer posts. > > Ryan > > On Wed, Apr 8, 2015 at 5:47 AM, Christian Ambros > wrote: > > Hi Ryan, > > could you write down, as a tutorial, how you built the example with the qt > designer? > In the last hours I read all most everything what can be found on the > issue of getting matplotlib running with pyqt5 and the designer but as you > realized yourself, there is little to be found handy. > > I'm stuck at a project, which has to use python3, and pyqt5 and am not > allowed by my boss to fall back to pyqt4 or qt_compat. He wants to make > sure that we use the latest revisions. > > So I#m very pleased to read that someone already set food on this terrain. > Qt5.4.1 is running and I installed PyQtdesingerplugins, in mind that they > were written for PyQt4. Are they usable in 5? I added the env-variables to > my bashrc, did get any changes shown in the designer. Of course I did a > re-log-in to start fresh, but any changes were noteable. > What possible ways of embedding matplotlib into a designer base pyqt5-gui > else, are there? > > cheers, > Christian > > > > -- > "A little learning never caused anyone's head to explode!" > > > "Ein wenig Lernen hat noch niemandens Kopf zum Explodieren gebracht!" > > > > On Wednesday, February 18, 2015 11:59 PM, Ryan Nelson < > rnelsonc...@gmail.com> wrote: > > > Hello list, > > A couple months ago, I spent quite a bit of time trying to figure out how > to use Qt designer create a GUI with an embedded MPL window. Unfortunately, > the Scipy cookbook page ( > http://wiki.scipy.org/Cookbook/Matplotlib/Qt_with_IPython_and_Designer) > is very outdated. A recent post ( > http://matplotlib.1069221.n5.nabble.com/Re-Keep-list-of-figures-or-plots-and-flip-through-list-using-UI-td44961.html) > brought up some questions about a use case very similar to mine, so I redid > my example and was going to write a quick tutorial for the docs. > > Unfortunately, I'm not a Qt guru, so I thought that I would ask on the > list for some advice. The OP and I were both interested in being able to > have a list of figures that you could select from to change the plot > window. The embedding examples in the docs create subclasses of > FigureClass* and embed the plotting figure/axes/etc. This works but gets > tricky, though, when trying to switch plots. Also, for interactive IPython > work, I didn't like that the plotting objects were mixed in with all the > QtGui.QWidget attributes, which makes introspective searching painful. My > solution was to create a dictionary of matplotlib.figure.Figure objects > that had all of the plotting stuff defined. Then when I select a new plot > from the list, the old one is removed and a new FigureClass object is > created using the selected Figure object. Has anyone else successfully done > something like this? Is there a better way? Also, it seems if I zoom the > current plot, change to a new plot, and change back, the zoom region is > retained. Anyone know how to reset the zoom region? > > Attached is my example: "window.py" is the Designer-created main wind
Re: [Matplotlib-users] [matplotlib-devel] Matplotlib and Numfocus Fiscal Sponsorship Agreement (FSA)
+1 -- sounds great! On Tue, Jan 20, 2015 at 7:48 AM, Michael Droettboom wrote: > > > > > > > > > * Matplotlib is a widely used, well regarded, and powerful visualization > library that has dominated the Python visualization stack for over a > decade. However, to maintain that position, matplotlib must continue to > evolve. Complementary or alternative libraries are appearing at an > increasing rate, including browser-based plotting and GPU acceleration. To > maintain its leadership position for the next decade, Matplotlib must > interface with these alternatives while simultaneously expanding its > capabilities and becoming easier to use and learn. Matplotlib’s large > existing user base (greater than 50,000) means that new developments need > to be carefully balanced with maintaining existing interfaces. With the > large user and code base comes a significant maintenance and user-support > burden. These responsibilities currently account for a majority of the > core-developer time spent on matplotlib and has resulted in both the code > base and community being in a healthier state than ever before. Even 6 > years ago there was no automated testing to speak of and the number of > contributors continues to soar on github. However, this effort is, for the > most part, done on a volunteer basis in the nights and weekends of the core > developers. To go beyond this maintenance level—to make step-change > improvements for the benefit of matplotlib’s users—will require funding for > full-time developers. Inspired and encouraged by the example of IPython, we > would like to begin the process of fundraising. Managing funding on the > needed scale is a complex and time-consuming process. Thankfully, > NumFOCUS, a 501(c)3 charity organisation co-founded by John Hunter, offers > a fiscal sponsorship agreement to minimize the administrative and legal > burden on open source projects. We would like to enlist NumFOCUS as our > agents in all legal and financial matters, including banking, accepting > donations as a non-profit, payroll, and access to legal counsel. As part > of the agreement, NumFOCUS would charge a percentage of all funds raised to > cover their costs. The full text of the agreement is attached. To comply > with the legal and accounting requirements of a non-profit, matplotlib > needs to form an administrative body to interact with NumFOCUS and direct > the disbursement of any funds. The proposed initial members of the body, > are myself (Mike Droettboom), Eric Firing, Phil Elson, and Thomas Caswell, > with Thomas acting as the point of contact with NumFOCUS. In practice, > signing an FSA will have very little impact on the matplotlib project > itself - it will still be BSD-licensed and community-driven as it has > always been, and the only motivation for doing this is to give us an > opportunity to apply for funding to do more work on matplotlib. We'd like > to canvas the community's opinion on the matter, but to put a concrete > timeline on the discussion, we would like to propose signing an FSA with > NumFOCUS in 3 weeks (Feb 10th 2015) unless there is a major community > discomfort with us doing so. Cheers, Michael Droettboom * > > -- > Michael Droettboom > Science Software Branch > Space Telescope Science Institute > http://www.droettboom.com > > > > -- > New Year. New Location. New Benefits. New Data Center in Ashburn, VA. > GigeNET is offering a free month of service with a new server in Ashburn. > Choose from 2 high performing configs, both with 100TB of bandwidth. > Higher redundancy.Lower latency.Increased capacity.Completely compliant. > http://p.sf.net/sfu/gigenet > ___ > Matplotlib-devel mailing list > matplotlib-de...@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/matplotlib-devel > > -- Christopher Barker, Ph.D. Oceanographer Emergency Response Division NOAA/NOS/OR&R(206) 526-6959 voice 7600 Sand Point Way NE (206) 526-6329 fax Seattle, WA 98115 (206) 526-6317 main reception chris.bar...@noaa.gov -- New Year. New Location. New Benefits. New Data Center in Ashburn, VA. GigeNET is offering a free month of service with a new server in Ashburn. Choose from 2 high performing configs, both with 100TB of bandwidth. Higher redundancy.Lower latency.Increased capacity.Completely compliant. http://p.sf.net/sfu/gigenet___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] best way to browse images
I've found that, for big images, the *first* draw is very slow, due to the
intensity scaling of the image, which happens at full resolution. Panning
and zooming afterwards is fast because the intensity scaling is cached, but
changing the data array or updating the norm kwarg is slow again. I made
ModestImage (https://github.com/ChrisBeaumont/mpl-modest-image) to deal
with this -- it dynamically downsamples images to screen resolution. This
makes the first draw after updating the data or norm much faster, while
slowing down subsequent redraws. Perhaps this could help you out?
cheers,
chris
On Tue, Oct 14, 2014 at 12:08 PM, Benjamin Root wrote:
> Only if there are multiple figures (plt.draw() operates on the current
> active figure, while fig.draw() explicitly operates upon that figure).
> Another possibility is that the bottleneck truly is the IO. Depending on
> exactly how fits work, it might be lazily loading data for you, so the test
> without the display of the images might not actually be loading any data
> into memory.
>
> Ben Root
>
> On Tue, Oct 14, 2014 at 11:22 AM, Slavin, Jonathan <
> jsla...@cfa.harvard.edu> wrote:
>
>> Hmm. I just saw that you suggest fig.draw(). Is there a difference with
>> plt.draw()?
>>
>> Jon
>>
>> On Tue, Oct 14, 2014 at 11:20 AM, Slavin, Jonathan <
>> jsla...@cfa.harvard.edu> wrote:
>>
>>> Hi Ben,
>>>
>>> Sorry, in my little example, I left out a few things. I do update first
>>> after the first call. And I do call draw() after other calls. So here is
>>> a more accurate representation of what I do:
>>>
>>> first = True
>>> fig = plt.figure()
>>> for file in files:
>>> hdu = fits.open(file)
>>> image = hdu[0].data
>>> hdu.close()
>>> if first:
>>> ax = fig,add_subplot(1,1,1)
>>> im = ax.imshow(image)
>>> plt.show()
>>> first = False
>>> else:
>>> im.set_data(image)
>>> plt.draw()
>>> ans = raw_input('continue?')
>>> if ans == 'n':
>>> break
>>>
>>> Jon
>>>
>>>
>>> On Tue, Oct 14, 2014 at 10:42 AM, Benjamin Root wrote:
>>>
>>>> Also, you aren't updating "first" after the first call, so it is
>>>> constantly making new axes and recalling imshow().
>>>>
>>>> Ben Root
>>>>
>>>> On Tue, Oct 14, 2014 at 10:41 AM, Benjamin Root
>>>> wrote:
>>>>
>>>>> What is happening is that you are not telling the image to redraw, so
>>>>> you are only seeing it refresh for other reasons. Try adding a fig.draw()
>>>>> call prior to the raw_input() call.
>>>>>
>>>>> Cheers!
>>>>> Ben Root
>>>>>
>>>>> On Tue, Oct 14, 2014 at 10:03 AM, Slavin, Jonathan <
>>>>> jsla...@cfa.harvard.edu> wrote:
>>>>>
>>>>>> Hi all,
>>>>>>
>>>>>> In my work lately I have often wanted to browse through a series of
>>>>>> images. This means displaying the image(s), looking at it/them and then
>>>>>> continuing. I have coded this in a few different ways, but it is
>>>>>> generally
>>>>>> pretty slow -- which is to say that the image display takes more than a
>>>>>> couple seconds (~4) after I tell it to continue to the next image. I
>>>>>> tested the loop without image display and it was a factor of ~80 times
>>>>>> faster than it was with image display, so it's doesn't have anything to
>>>>>> do
>>>>>> with reading the images from disk. My latest approach is basically:
>>>>>> first = True
>>>>>> fig = plt.figure()
>>>>>> for file in imagefiles:
>>>>>> # read in image data (fits files)
>>>>>> if first:
>>>>>> ax = fig.add_suplot(1,1,1)
>>>>>> im = ax.imshow(image)
>>>>>> else:
>>>>>> im.set_data(image)
>>>>>> ans = raw_input('continue?')
>>>>>> if ans == 'n':
>>>>>> break
>>>>>>
>>>>>> Is there a more efficient way to do this?
>>>>>>
>>>>>> Regards,
>>>>>> Jon
>>>>>>
>&
Re: [Matplotlib-users] third-party mpl widgets/tools?
Hi Ben, Glue (glueviz.org) is built on top of matplotlib -- its more of an application than a toolkit for supplementing MPL, although it's new custom data viewer feature lets you easily turn static matplotlib plots into interactive, selectable plots (see http://www.glueviz.org/en/latest/custom_viewer.html). chris On Sat, Oct 4, 2014 at 8:53 AM, Benjamin Root wrote: > I working on compiling a list of third-party tools that provide > interactive features to matplotlib. I am looking for tools such as Joe's > mpldatacursor. If you know of a tool that should be included in this list, > let me know! > > Thanks, > Ben Root > > > -- > Meet PCI DSS 3.0 Compliance Requirements with EventLog Analyzer > Achieve PCI DSS 3.0 Compliant Status with Out-of-the-box PCI DSS Reports > Are you Audit-Ready for PCI DSS 3.0 Compliance? Download White paper > Comply to PCI DSS 3.0 Requirement 10 and 11.5 with EventLog Analyzer > > http://pubads.g.doubleclick.net/gampad/clk?id=154622311&iu=/4140/ostg.clktrk > ___ > Matplotlib-users mailing list > Matplotlib-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/matplotlib-users > > -- * Chris Beaumont Senior Software Engineer Harvard Center for Astrophysics 60 Garden Street, MS 42 Cambridge, MA 02138 chrisbeaumont.org * -- Meet PCI DSS 3.0 Compliance Requirements with EventLog Analyzer Achieve PCI DSS 3.0 Compliant Status with Out-of-the-box PCI DSS Reports Are you Audit-Ready for PCI DSS 3.0 Compliance? Download White paper Comply to PCI DSS 3.0 Requirement 10 and 11.5 with EventLog Analyzer http://pubads.g.doubleclick.net/gampad/clk?id=154622311&iu=/4140/ostg.clktrk___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] 'save file' GUI dialog
Hey Tom, It looks like the only backend-agnostic file save function is save_figure() (a toolbar method), which conflates choosing a filename and doing the actual saving. The backend-specific code to choose a filename via a dialog isn't uniform: Qt4: matplotlib.backends.backend_qt4._getSaveFileName MacOS matplotlib.backends.backend_osx._macosx.choose_save_file Wx: A bunch of code in matplotlib.backends.backend_wx.save_figure TkAgg: Tkinter.FileDialog GtkAgg: get_filechooser().get_filename_from_user() It looks like, at a minimum, you would have to write your own wrapper code to make a backend-agnostic interface for choosing a filename. Of course, if you did that, it would also be nice to refactor that into MPL itself... :) chris On Fri, Jun 20, 2014 at 8:22 AM, Thomas Robitaille < thomas.robitai...@gmail.com> wrote: > Hi everyone, > > I'm developing a simple GUI tool in Matplotlib that relies on the > event framework to handle buttons/sliders. I am trying to avoid using > a GUI toolkit directly to ensure maximum compatibility for users. > > One thing I would like is to be able to have a 'save' button that will > open up a standard 'save file' dialog window (but not necessarily the > plot itself). Matplotlib already has 'save file' GUI dialogs for the > different backends, so I was wondering whether there is an easy and > abstract way of asking matplotlib to open a 'save file' dialog and > capturing the output? Or is this all handled separately in the > different backends? > > Thanks! > Tom > > > -- > HPCC Systems Open Source Big Data Platform from LexisNexis Risk Solutions > Find What Matters Most in Your Big Data with HPCC Systems > Open Source. Fast. Scalable. Simple. Ideal for Dirty Data. > Leverages Graph Analysis for Fast Processing & Easy Data Exploration > http://p.sf.net/sfu/hpccsystems > ___ > Matplotlib-users mailing list > Matplotlib-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/matplotlib-users > > -- > * > Chris Beaumont > Senior Software Engineer > Harvard Center for Astrophysics > 60 Garden Street, MS 42 > Cambridge, MA 02138 > chrisbeaumont.org > * > -- HPCC Systems Open Source Big Data Platform from LexisNexis Risk Solutions Find What Matters Most in Your Big Data with HPCC Systems Open Source. Fast. Scalable. Simple. Ideal for Dirty Data. Leverages Graph Analysis for Fast Processing & Easy Data Exploration http://p.sf.net/sfu/hpccsystems___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] plotting large images
I've been burned by this before as well. MPL stores some intermediate data products (for example, scaled RGB copies) at full resolution, even though the final rendered image is downsampled depending on screen resolution. I've used some hacky tricks to get around this, which mostly involve downsampling the image on the fly based on screen resolution. One such effort is at https://github.com/ChrisBeaumont/mpl-modest-image. If you are loading your arrays from disk, you can also use memory-mapped arrays -- this prevents you from loading all the data into RAM, and further cuts down on the footprint. cheers, chris On Tue, Aug 27, 2013 at 6:49 AM, Štěpán Turek wrote: > > You could look at whether or not you actually need 64-bit precision. Often > times, 8-bit precision per color channel is justifiable, even in grayscale. > My advice is to play with the dtype of your array or, as you mentioned, > resample. > > > thanks, this helped me significantly, uint8 precision is enough. > > > > Also, is it needed to keep all images? It sounds to me like your > application will become very resource hungry if you're going to be > displaying several of these 2D images over each other (and if you don't use > transparency, you won't get any benefit at all from plotting them together). > > > Yes, I need them all . > > To avoid it I am thinking about merging them into one image and then plot > it. > > > Stepan > > > > -- > Introducing Performance Central, a new site from SourceForge and > AppDynamics. Performance Central is your source for news, insights, > analysis and resources for efficient Application Performance Management. > Visit us today! > http://pubads.g.doubleclick.net/gampad/clk?id=48897511&iu=/4140/ostg.clktrk > ___ > Matplotlib-users mailing list > Matplotlib-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/matplotlib-users > > -- Introducing Performance Central, a new site from SourceForge and AppDynamics. Performance Central is your source for news, insights, analysis and resources for efficient Application Performance Management. Visit us today! http://pubads.g.doubleclick.net/gampad/clk?id=48897511&iu=/4140/ostg.clktrk___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Intersecting polygons
Thanks for the tips -- I wish there was a way to do this within MPL, but it sounds like I'll have to live with external hackery. > > > PS. Try to convince the Dark Powers of the journal you send your work, > > that they modernize their processing and accept PDF. > +1 I know, right? chris -- Introducing Performance Central, a new site from SourceForge and AppDynamics. Performance Central is your source for news, insights, analysis and resources for efficient Application Performance Management. Visit us today! http://pubads.g.doubleclick.net/gampad/clk?id=48897511&iu=/4140/ostg.clktrk___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] [matplotlib-devel] I have a Mac!
On Fri, Aug 23, 2013 at 8:14 AM, Matt Terry wrote: > I'm banging away at installing MPL on top of python.org's python. This is why binary installers are good idea! > the libfreetype/freetype issue. yeah, that's kind of uglyand where is doesn't "just work" for me... > 1) install libpng[1] and freetype[2] from source libpng and freetype are different, though install from source may be the way to go: libpng is there, but is not properly installed, I'm not sure it's got the header for the same version as the lib, and libpng-config is either not there or not for the right version or somethign ugly. It look, form messages at build time, that someone has hacked some code into the MPL build that figures all that out, but for other stuff I'm doing, I just punt and build libpng -- that's pretty straighforward, at least. But teh solution in the MPL code now seems to work. > 2) install XQuartz[3] and twiddle /opt/X11, /usr/X11 (per Russell's > directions[4]) so MPL finds XQuartz's libpng/freetype I _think_ that OS-X now ships with X11, which has freetype (though installed weirdly once again...) we certainly should NOT expect people to install anything big to build MPL, and binaries should not depend on anything not shipped by Apple by default. According to Russell, you do need to install something, so I think that's out. > 4) create the MPL binary installer and use that That's what most people should do -- but one of us needs to build it. > Option 1 seems simple-est, but installing freetype requires more than > ./configure && make && sudo make install. darn. But hopefully we can figure it out. > Option 4: This would require some input from whoever (Gohlke?, Owen?) makes > the binary installers. I think Russell has been doing it for MPL lately. My thoughts: We want to support two user-bases: 1) folks that don't mind a little command line work, and probably need other scientific libs, etc anyway, an want an MPL that runs on their machine: - these folks should use homebrew or macports to build the dependencies (or even hand-compile them). Ideally we have setup.py that will find those libs, and test to see that the builds work once in a while. 2) folks that "just want to use it" and/or want a binary they can re-distribute via py2app, etc. - for these folks, we need to provide binaries. These binaries should: 1) Match the python.org python builds. (probably only the Intel ones now...) 2) statically link the non-sytem libs This has been done for a while, off and on, most recently by Russell, AFAIK. But this is not a problem unique to MPL. All sorts of python packages need this, and only some of the package maintainers do it (well). Also, a bunch of packages require the same dependencies (i.e. PIL and MPL both need png and freetype) So, rather than re-inventing the wheel over and over again, It would be great to have a central repository where we can develop build scripts, etc that share an infrustructure for building these binaries. I've started one: https://github.com/MacPython/mac-builds there is not much there, only a couple things I'm working on at the moment (netCDF4, which is of interest to scipy folks, and py_gd, which is my own simple drawing lib, that no one else uses (yet?) If anyone wants to join the project let me know -- if I know you from your work with this community, I'll gladly add you. I'm using the gattai build system: (https://sourceforge.net/projects/gattai/). I decided to do that, as I was sick of re-writing essentially the same build scripts, and I kept adding features to mine that would have resulted in re-implementing gattai anyway. I've been hacking at gattai, and its author is quite open to moving it forward. That being said, there is no reason that we need to use the same build system -- we could easily have custom build scripts for a project, and still have it share the dependencies. I was planning on getting it all further along before announcing the project and looking for help, but since is came up... -Chris -- Christopher Barker, Ph.D. Oceanographer Emergency Response Division NOAA/NOS/OR&R(206) 526-6959 voice 7600 Sand Point Way NE (206) 526-6329 fax Seattle, WA 98115 (206) 526-6317 main reception chris.bar...@noaa.gov -- Introducing Performance Central, a new site from SourceForge and AppDynamics. Performance Central is your source for news, insights, analysis and resources for efficient Application Performance Management. Visit us today! http://pubads.g.doubleclick.net/gampad/clk?id=48897511&iu=/4140/ostg.clktrk ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Intersecting polygons
Thanks for these tips. It looks like some programs (like illustrator, and pdf2ps) are semi-smart about handling transparency when converting to ps. Both have their quirks (illustrator seems to mess up the bounding box, pdf2ps makes the text look worse/fuzzy). Is this the recommended/best strategy? Thanks, chris On Thu, Aug 22, 2013 at 8:04 PM, Jerzy Karczmarczuk < jerzy.karczmarc...@unicaen.fr> wrote: > Chris Beaumont : > > > > I have a semitransparent plot that I rather like: > ... > > I'd like to publish something like this in a journal which requires > > EPS figures. Unfortunately, EPS doesn't support transparency. > > > > How hard would it be to coax matplotlib (or another tool) to convert > > this semi-transparent figure into a non-semitransparent figure that > > looks the same? > > I won't claim that this is an ultimate solution, but what I did a few > times was to > 1. Choose the svg backend, savefig the picture as svg. > 2. Open in Inkscape and export as .eps. > > The result was satisfactory. > > Jerzy Karczmarczuk > > > > -- > Introducing Performance Central, a new site from SourceForge and > AppDynamics. Performance Central is your source for news, insights, > analysis and resources for efficient Application Performance Management. > Visit us today! > http://pubads.g.doubleclick.net/gampad/clk?id=48897511&iu=/4140/ostg.clktrk > ___ > Matplotlib-users mailing list > Matplotlib-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/matplotlib-users > -- Introducing Performance Central, a new site from SourceForge and AppDynamics. Performance Central is your source for news, insights, analysis and resources for efficient Application Performance Management. Visit us today! http://pubads.g.doubleclick.net/gampad/clk?id=48897511&iu=/4140/ostg.clktrk___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
[Matplotlib-users] Intersecting polygons
Hi, I have a semitransparent plot that I rather like: [image: Inline image 1] I'd like to publish something like this in a journal which requires EPS figures. Unfortunately, EPS doesn't support transparency. How hard would it be to coax matplotlib (or another tool) to convert this semi-transparent figure into a non-semitransparent figure that looks the same? It would consist of more polygons, each of which has a constant RGB value in the transparent figure. I don't want to rasterize the lines, because I like zooming absurdly far into plots, and having them stay crisp. Cheers, Chris <>-- Introducing Performance Central, a new site from SourceForge and AppDynamics. Performance Central is your source for news, insights, analysis and resources for efficient Application Performance Management. Visit us today! http://pubads.g.doubleclick.net/gampad/clk?id=48897511&iu=/4140/ostg.clktrk___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] [matplotlib-devel] Calling to those "embedding" matplotlib in applications
On Mon, Aug 12, 2013 at 7:01 AM, Michael Droettboom wrote: > I propose to fix this by turning on interactive only when > running at an interactive console. I embed MPL more than other uses, and this sounds like a fine solution to me/ Thanks, -Chris -- Christopher Barker, Ph.D. Oceanographer Emergency Response Division NOAA/NOS/OR&R(206) 526-6959 voice 7600 Sand Point Way NE (206) 526-6329 fax Seattle, WA 98115 (206) 526-6317 main reception chris.bar...@noaa.gov -- Get 100% visibility into Java/.NET code with AppDynamics Lite! It's a free troubleshooting tool designed for production. Get down to code-level detail for bottlenecks, with <2% overhead. Download for free and get started troubleshooting in minutes. http://pubads.g.doubleclick.net/gampad/clk?id=48897031&iu=/4140/ostg.clktrk ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
[Matplotlib-users] linear regression with dates as x axis
Hi all, I have some time series of disk usage that I'd like to do a linear regression on an plot on a nice graph with Mb used on the y-axis and date on the x axis. I tried to use pylab.polyfit(dates, usage) where: dates = [datetime(x, y, z), datetime(a, b, c), ...] usage = [12123234, 2234235235, ...] ...but polyfit doesn't like the dates. How should I do this? Any example of a nice plot and linear regression using matplotlib? cheers, Chris -- Simplistix - Content Management, Batch Processing & Python Consulting - http://www.simplistix.co.uk -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Focus in OSX
Actually I don't know about the apple supplied python, but I believe enthoughts python is installed as a framework. C On Apr 12, 2012, at 8:53 PM, Michiel de Hoon wrote: > --- On Wed, 4/11/12, Zachary Pincus wrote: >> Hopefully someone who knows more about the OS X backend can >> comment here... > > It sounds like the Python you are using is not installed as a framework. > Using the --enable-framework flag when compiling Python. > > -Michiel. > > -- > For Developers, A Lot Can Happen In A Second. > Boundary is the first to Know...and Tell You. > Monitor Your Applications in Ultra-Fine Resolution. Try it FREE! > http://p.sf.net/sfu/Boundary-d2dvs2 > ___ > Matplotlib-users mailing list > Matplotlib-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/matplotlib-users -- For Developers, A Lot Can Happen In A Second. Boundary is the first to Know...and Tell You. Monitor Your Applications in Ultra-Fine Resolution. Try it FREE! http://p.sf.net/sfu/Boundary-d2dvs2 ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Focus in OSX
I get the exact same behavior from both Enthought supplied python and Apple
supplied python. I haven't tried any other pythons, but it isn't limited to the
Apple one.
C
On Apr 11, 2012, at 1:58 PM, Elliot Saba wrote:
> I'm using homebrew python, which is built from source, and the latest
> matplotlib gotten from git://github.com/matplotlib/matplotlib.git. (I
> rebuilt it ~2 minutes ago)
>
> Perhaps there's some kind of environment difference?
> -E
>
> On Wed, Apr 11, 2012 at 5:12 AM, Zachary Pincus
> wrote:
> > 1. Keyboard input always goes to the terminal. Shortcuts don't work in the
> > standard plot windows and my custom widgets no longer catch
> > key_press_events (I'm not sure when this functionality broke exactly as I
> > haven't used those widgets much recently but it worked when I developed 'em
> > a year or two ago.)
> >
> > 2. There's no icon in the cmd-tab task switcher corresponding to the figure
> > windows. Swapping to the terminal running ipython (or the qtconsole for
> > ipython qtconsole) does not raise the windows.
> >
> > 3. Using mission control, the figures appear grouped as if they belong to
> > an application of their own. However, when you click on them to swap to
> > them and bring them forward from behind other windows, they raise and then
> > immediately disappear again. I think that mission control is raising the
> > specific window you select from the collection of figures, but then OSX is
> > somehow immediately re-raising the previously selected app, which hides the
> > figures again.
>
> Hmm, I don't really see these issues, using a dev matplotlib, OS X 10.7.3,
> and a python.org python 2.7. Interesting. (This is with the 'MacOSX' backend,
> mind. Also note that on March 5 there was a patch to that backend to fix a
> few issues, so if your matplotlib checkout is before that, perhaps that's the
> problem?)
>
> Anyhow, when I start python (or ipython), and then do "import
> matplotlib.pyplot as plt", nothing happens, but then "plt.figure()", for
> example, causes a new dock icon to appear -- a python rocket-ship thing --
> that acts as an "app" that owns the figure windows. I can use this app to
> switch to / raise the windows from the dock or the cmd-tab switcher, and
> things work correctly via mission control as well.
>
> The keyboard shortcuts are a bit flaky ('s' never seems to work, but I can
> e.g. toggle gridlines with 'g' or log-axes with 'l'), but the key-presses
> definitely don't go to the terminal.
>
> I wonder what the difference is? Perhaps the apple-supplied python is a bit
> broken in this regard?
>
> Zach
> --
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[Matplotlib-users] Focus in OSX
Hi all- I've been running into this issue for the last few months and at first thought it was Enthought specific but now have confirmed it on a clean (virtualenv) install of Fonnesbeck's superpack using built in Apple python and a dev matplotlib on Lion. With the OSX backend, figures clearly have focus issues: 1. Keyboard input always goes to the terminal. Shortcuts don't work in the standard plot windows and my custom widgets no longer catch key_press_events (I'm not sure when this functionality broke exactly as I haven't used those widgets much recently but it worked when I developed 'em a year or two ago.) 2. There's no icon in the cmd-tab task switcher corresponding to the figure windows. Swapping to the terminal running ipython (or the qtconsole for ipython qtconsole) does not raise the windows. 3. Using mission control, the figures appear grouped as if they belong to an application of their own. However, when you click on them to swap to them and bring them forward from behind other windows, they raise and then immediately disappear again. I think that mission control is raising the specific window you select from the collection of figures, but then OSX is somehow immediately re-raising the previously selected app, which hides the figures again. Just to check its not IPython's fault, I also checked running a bare python, import all from pylab and showed a (blocking) figure -- exact same behavior. Is this a known bug? It's quite annoying not to be able to switch focus to a plot window. Best, Chris -- Better than sec? Nothing is better than sec when it comes to monitoring Big Data applications. Try Boundary one-second resolution app monitoring today. Free. http://p.sf.net/sfu/Boundary-dev2dev ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] use the github version on a linux box
Thanks Tony and JDH, problem resolved and now I can try to compile.
- Chris
On Wed, Feb 8, 2012 at 10:41 AM, Tony Yu wrote:
>
>
> On Wed, Feb 8, 2012 at 1:20 PM, Chris wrote:
>>
>> New error at `git checkout -b mdboom-pixel_marker v1.1.x':
>>
>> fatal: git checkout: updating paths is incompatible with switching
>> branches.
>> Did you intend to checkout 'v1.1.x' which can not be resolved as commit?
>>
>> - Chris
>
>
> That looks like something I've done before without issue. Maybe you're on an
> older version of git. In any case, you can break this up into two steps
>
> # change to maintenance branch
> git checkout v1.1.x
>
> # create new branch based on current checkout
> git checkout -b mdboom-pixel_marker
>
>
> Then continue as John instructed.
>
> -Tony
>
>
>
>>
>>
>> On Wed, Feb 8, 2012 at 10:13 AM, John Hunter wrote:
>> >
>> >
>> > On Wed, Feb 8, 2012 at 12:06 PM, Tony Yu wrote:
>> >
>> >>> git clone g...@github.com:matplotlib/matplotlib.git matplotlib.git
>> >>>
>> >>> did not go through.
>> >>>
>> >>> - Chris
>> >>>
>> >>
>> >> I don't think you want the ".git" at the very end of the clone command.
>> >> That just tells get where (i.e. new directory) to put the repo.
>> >>
>> >
>> > I don't think that is the problem. I just add the .git extension
>> > because
>> > the default is to check out a directory called "matplotlib" which if it
>> > is
>> > located in the path you are running or testing from, will confuse the
>> > import. So I just add some extension so python won't confuse the mpl
>> > src
>> > dir ("matplotlib.git") with the mpl package ("matplotlib").
>
>
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Re: [Matplotlib-users] use the github version on a linux box
New error at `git checkout -b mdboom-pixel_marker v1.1.x':
fatal: git checkout: updating paths is incompatible with switching branches.
Did you intend to checkout 'v1.1.x' which can not be resolved as commit?
- Chris
On Wed, Feb 8, 2012 at 10:13 AM, John Hunter wrote:
>
>
> On Wed, Feb 8, 2012 at 12:06 PM, Tony Yu wrote:
>
>>> git clone g...@github.com:matplotlib/matplotlib.git matplotlib.git
>>>
>>> did not go through.
>>>
>>> - Chris
>>>
>>
>> I don't think you want the ".git" at the very end of the clone command.
>> That just tells get where (i.e. new directory) to put the repo.
>>
>
> I don't think that is the problem. I just add the .git extension because
> the default is to check out a directory called "matplotlib" which if it is
> located in the path you are running or testing from, will confuse the
> import. So I just add some extension so python won't confuse the mpl src
> dir ("matplotlib.git") with the mpl package ("matplotlib").
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Re: [Matplotlib-users] use the github version on a linux box
This time the error is: fatal: Not a git repository (or any of the parent directories): .git I guess that I have not be able to establish a local git tree since the command git clone g...@github.com:matplotlib/matplotlib.git matplotlib.git did not go through. - Chris On Wed, Feb 8, 2012 at 9:48 AM, John Hunter wrote: > > > On Wed, Feb 8, 2012 at 11:39 AM, Chris wrote: >> >> Thanks John. Since I already have a running copy of mpl, I skipped to >> the git clone step, but get this error: >> >> Permission denied (publickey). >> fatal: The remote end hung up unexpectedly >> >> I'm a complete noob on git, so please bear with me. > > > > I think I should have pointed you to the read only address. Try this: > > > git pull git://github.com/mdboom/matplotlib.git pixel_marker > > JDH > -- Keep Your Developer Skills Current with LearnDevNow! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-d2d ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] use the github version on a linux box
Thanks John. Since I already have a running copy of mpl, I skipped to the git clone step, but get this error: Permission denied (publickey). fatal: The remote end hung up unexpectedly I'm a complete noob on git, so please bear with me. - Chris On Wed, Feb 8, 2012 at 9:31 AM, John Hunter wrote: > > > On Wed, Feb 8, 2012 at 11:06 AM, Chris wrote: >> >> I was trying to test the patch mike put in to fix the single pixel >> plotting issue, but just realized that this was a Mac version. Can I >> use it on a linux box? How? > > > These instructions are for an ubuntu based system -- if you are on a > different version of linux you may need different commands to install git > and the mpl build dependencies > > # install git to checkout the mpl src code > sudo apt-get install git > > # install the pre-reqs to build matplotlib from source > sudo apt-get build-dep python-matplotlib > > # get the latest released branch of matplotlib > git clone g...@github.com:matplotlib/matplotlib.git matplotlib.git > > # cd into the matplotlib directory and create a branch off of the release > branch to test > cd matplotlib.git > git checkout -b mdboom-pixel_marker v1.1.x > > # pull in Michael's changes > git pull https://github.com/mdboom/matplotlib.git pixel_marker > > # build the matplotlib source code > python setup.py build > > # install it > sudo python setup.py install -- Keep Your Developer Skills Current with LearnDevNow! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-d2d ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
[Matplotlib-users] use the github version on a linux box
I was trying to test the patch mike put in to fix the single pixel plotting issue, but just realized that this was a Mac version. Can I use it on a linux box? How? Thanks, Chris -- Keep Your Developer Skills Current with LearnDevNow! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-d2d ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Why pixel marker size is 4 pixels?
JJ,
Thanks for the clarification. Now I understand why EPS outputs of
pixel plot from mpl is a few times bigger than those from SuperMongo.
I guess that mpl uses the square implementation for pixel so that it
would use the same method to handle all marker types. I will file an
issue report on git. Meanwhile, is there any easy workaround?
Jonathan,
Tom Robitaille's module does help reducing file size of postscript,
but by rasterize a scalable plot. It doesn't really help my problem
since the markers are still drawn with the same method as other
plotting methods.
Bests,
Chris
On Mon, Feb 6, 2012 at 4:28 AM, Jae-Joon Lee wrote:
> Thanks. Now I understand the situation.
>
> As far as I can see, marker="," is implemented as a rectangle path
> with width/height of 1 pixel, so this result in 2x2 pixel filled
> square.
> I tried to change the size of the rectangle, etc, to get a single
> pixel filled square, but did not get a satisfactory result.
> I think we need an Agg expert. I hope Mike or others take a look.
>
> Chris,
> if you do not get a response from others in this mailing list, I
> recommend you to open a new issue in our github page.
>
> Regards,
>
> -JJ
>
On Mon, Feb 6, 2012 at 6:19 AM, Jonathan Slavin wrote:
> Chris,
>
> You might want to try a module written by Tom Robitaille (aka astrofrog)
> called rasterized_scatter. Look for it on github.
>
> Jon
>
> On Mon, 2012-02-06 at 21:28 +0900, Jae-Joon Lee wrote:
>> Thanks. Now I understand the situation.
>>
>> As far as I can see, marker="," is implemented as a rectangle path
>> with width/height of 1 pixel, so this result in 2x2 pixel filled
>> square.
>> I tried to change the size of the rectangle, etc, to get a single
>> pixel filled square, but did not get a satisfactory result.
>> I think we need an Agg expert. I hope Mike or others take a look.
>>
>> Chris,
>> if you do not get a response from others in this mailing list, I
>> recommend you to open a new issue in our github page.
>>
>> Regards,
>>
>> -JJ
>>
>>
>> On Mon, Feb 6, 2012 at 1:53 AM, Chris wrote:
>> > Thanks JJ.
>> >
>> > The problem seems not to be a size issue -- markersize has no effect
>> > when use marker="," (pixel). I have also tried to turn off aa, and it
>> > doesn't help either. I also tried different backends. The PNG output
>> > from Agg and Cairo is slightly different: Agg's point has 4 solid
>> > pixel, while Cairo's has 4 pixel with random shade.
>> >
>> > Postscript output has the same problem. The "pixel" in an EPS file
>> > generated by mpl is significantly bigger than that from another
>> > drawing program I used.
>> >
>> > The problem occurs in all my plotting scripts, e.g., this basic one:
>> >
>> > [CODE]
>> > import numpy as np
>> >
>> > x=np.arange(100)
>> > y=np.random.randn(100)
>> >
>> > ioff()
>> > fig=gcf()
>> > fig.clf()
>> >
>> > ax=fig.add_axes(0.15,0.1,0.8, 0.85)
>> > ax.plot(x,y,"k,")
>> >
>> > ion()
>> > fig.canvas.draw()
>> > [/CODE]
>> >
>> > Here is how I identify the problem:
>> > 1. use the above script to plot on screen
>> > 2. savefig("plot.png")
>> > 3. open plot.png in GIMP and check the pixel size.
>> >
>> > I also attached the two PNG files generated with Agg and Cairo backends.
>> >
>> >
>> > On Sun, Feb 5, 2012 at 6:45 AM, Jae-Joon Lee wrote:
>> >> How are you plotting your points.
>> >>
>> >> If you use *plot*, there is a *markersize* parameter.
>> >> If you use *scatter*, the third argument controls the marker size.
>> >>
>> >> But you may actually complaining about other issues, e.g.,
>> >> antialiasing, etc. So, if above are not your answer, please post a
>> >> complete example and describe your problem in more detail.
>> >>
>> >> Regards,
>> >>
>> >> -JJ
>> >>
>> >>
>> >> On Sat, Feb 4, 2012 at 2:15 PM, Chris wrote:
>> >>> I noticed this a few years back, but left it aside because most of the
>> >>> time I can live with it. Recently I need to make a few plots
>> >>> containing a few million points, and 4 pixels for a point is a
>> >>> disaster. So my question is why the pixel marker size is set at 4
>> >>> pixels? And is there anyway to change it to a single pixel?
>> >>>
>> >>> Thanks,
>> >>> Chris
>
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Re: [Matplotlib-users] Why pixel marker size is 4 pixels?
Thanks JJ.
The problem seems not to be a size issue -- markersize has no effect
when use marker="," (pixel). I have also tried to turn off aa, and it
doesn't help either. I also tried different backends. The PNG output
from Agg and Cairo is slightly different: Agg's point has 4 solid
pixel, while Cairo's has 4 pixel with random shade.
Postscript output has the same problem. The "pixel" in an EPS file
generated by mpl is significantly bigger than that from another
drawing program I used.
The problem occurs in all my plotting scripts, e.g., this basic one:
[CODE]
import numpy as np
x=np.arange(100)
y=np.random.randn(100)
ioff()
fig=gcf()
fig.clf()
ax=fig.add_axes(0.15,0.1,0.8, 0.85)
ax.plot(x,y,"k,")
ion()
fig.canvas.draw()
[/CODE]
Here is how I identify the problem:
1. use the above script to plot on screen
2. savefig("plot.png")
3. open plot.png in GIMP and check the pixel size.
I also attached the two PNG files generated with Agg and Cairo backends.
On Sun, Feb 5, 2012 at 6:45 AM, Jae-Joon Lee wrote:
> How are you plotting your points.
>
> If you use *plot*, there is a *markersize* parameter.
> If you use *scatter*, the third argument controls the marker size.
>
> But you may actually complaining about other issues, e.g.,
> antialiasing, etc. So, if above are not your answer, please post a
> complete example and describe your problem in more detail.
>
> Regards,
>
> -JJ
>
>
> On Sat, Feb 4, 2012 at 2:15 PM, Chris wrote:
>> I noticed this a few years back, but left it aside because most of the
>> time I can live with it. Recently I need to make a few plots
>> containing a few million points, and 4 pixels for a point is a
>> disaster. So my question is why the pixel marker size is set at 4
>> pixels? And is there anyway to change it to a single pixel?
>>
>> Thanks,
>> Chris
>>
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[Matplotlib-users] Why pixel marker size is 4 pixels?
I noticed this a few years back, but left it aside because most of the time I can live with it. Recently I need to make a few plots containing a few million points, and 4 pixels for a point is a disaster. So my question is why the pixel marker size is set at 4 pixels? And is there anyway to change it to a single pixel? Thanks, Chris -- Try before you buy = See our experts in action! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-dev2 ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
[Matplotlib-users] using matplotlib in web servers
Hi All, The majority of the docs for matplotlib focus on making its behaviour like that of Matlab, however, I'm looking to use it to generate graphs for display by web apps. Where can I find good examples of doing this? (ie: multi-threaded, multi-process apps which may by simulaneously generating many plots for different users using different data) cheers, Chris -- Simplistix - Content Management, Batch Processing & Python Consulting - http://www.simplistix.co.uk -- Get a FREE DOWNLOAD! and learn more about uberSVN rich system, user administration capabilities and model configuration. Take the hassle out of deploying and managing Subversion and the tools developers use with it. http://p.sf.net/sfu/wandisco-d2d-2 ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] [SciPy-User] getting started with arrays and matplotlib
On 07/08/2011 22:29, David Warde-Farley wrote: >> Secondly, once I've populated this, any good examples of how to turn it >> into a bar chart? (the simple bar chart would be number of sales on the >> y-axis, weeks before the event on the x-axis, however, what I'd then >> like to do is split each bar into chunks for each venue's sales, if that >> makes sense?) > > This might give you an example of what you need: > > http://matplotlib.sourceforge.net/examples/pylab_examples/bar_stacked.html > > but you'd be better off asking on matplotlib-users. Thanks, that was a good start. One question: How can I automatically get a list of colours for each bar? I don't know how many bars I'm going to have so I can't manually pick them... This feels like a common enough problem that I'm guessing there's a solution somewhere in matplotlib? cheers, Chris -- Simplistix - Content Management, Batch Processing & Python Consulting - http://www.simplistix.co.uk -- Get a FREE DOWNLOAD! and learn more about uberSVN rich system, user administration capabilities and model configuration. Take the hassle out of deploying and managing Subversion and the tools developers use with it. http://p.sf.net/sfu/wandisco-d2d-2 ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
[Matplotlib-users] animations in macosx/wxagg
Hi,
I want to visualise a live data-stream by a number of plots (3d,
line drawings, scatter plots etc). I've been using the simpler
animation techniques (using gobject.idle_add and wx.EVT_IDLE to
redraw updates).
Some plots have static backgrounds that may benefit from the blit
techniques and I have been trying to get this approach to work in
GTKAgg and WXAgg. GTKAgg on linux seems to be coming along fine.
WXAgg on linux or macos, I'm not getting very far with.
So can anyone help with a few questions?
- can the native macos backend be used for animation? What's the
equivalent of gobject.idle_add or gobject.timeout_add? Anything
special needed for the blitting approach to work?
- What needs to be done to get WXAgg blitting? I have code like this:
...
matplotlib.use('WXAgg')
...
def update():
...
# restore, blit etc
wx.WakeUpIdle()
...
wx.EVT_IDLE(wx.GetApp(), update)
...
On Linux this draws the first screen and pauses. If I move the mouse
around I see the updates. As soon as I stop, so do the updates. What
am I missing? (BTW I get the same behaviour from animation_blit_wx.py
from the examples page). This is 1.0.1 on Linux, although I'm still
using 0.99.1 as well.
thanks for any help,
cheers, chris
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[Matplotlib-users] Subplot x-tick labels overlap with each other and with titles
Hi
Whenever I create figures with at least 3x3 subplots, the x-tick
labels overlap with each other and they also overlap with the title of
the adjacent subplot, rendering the entire figure illegible. I know
that I can fine-tune the plot to look exactly the way I want with
"wspace" and "hspace" for instance, but I don't understand why this is
the default behavior. I wonder if I have a system font issue, such
that matplotlib thinks the fonts are smaller than they really are.
My questions:
1) Is this the intended behavior of matplotlib, or is there something
wrong with my installation?
2) Assuming I don't have an installation issue, is there a very
general parameter I can change so that the overlap doesn't occur,
rather than manually adjusting every figure?
Minimal code to reproduce the problem:
import numpy as np
import matplotlib.pyplot as plt
plt.figure()
plt.subplot(331)
plt.subplot(334)
plt.plot(np.arange(1))
plt.title('Title')
plt.show()
I'm attaching the output figure, although I'm not sure if the list
accepts attachments. The x-tick labels on subplot 334 overlap each
other, and the title of subplot 334 overlaps with the x-tick labels in
subplot 331.
System:
Ubuntu 10.04 x64
All packages are the stable versions from Synaptic, including ipython,
python, numpy, matplotlib 0.99.1.1
I've also tried the Enthought distribution with matplotlib 1.0.1 and
the results are the same
I've tried both "Wx" and "Tk" backends and the results are the same
I've tried `matplotlib.rcParams['xtick.labelsize'] = 'x-small'`, and
this does make the labels smaller, but for sufficiently large numbers
the overlap still occurs.
Thanks for any help!
Chris
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Re: [Matplotlib-users] Feature request: automatic scaling of subplots, margins, etc
Since I just posted an almost-identical question, it's no surprise
that I agree this would be a useful feature.
Reason #1) I create hundreds of quick throwaway figures every day,
often in an automated way, and don't have time to fine-tune them.
Reason #2) a newbie to matplotlib might be turned off by one "ugly"
figure, when in fact matplotlib is capable of producing beautiful
figures.
The previous suggestion I received was to create a convenience wrapper
for the subplot function with some idiot-proof defaults. Can you
propose a set of rcParams that satisfies this criterion? This one
fixes the specific issue you raise:
matplotlib.rcParams['figure.subplot.hspace'] = .5
Although it will rear its ugly head again once the number of subplots
reaches 5 or 6. Personally I rarely use more than 4x4, and if I did I
would certainly increase the figsize.
I find that setting all text sizes to be as small as possible also
helps. My most commonly encountered issue is overlapping x-tick
labels, because most of my plots have "samples" on the x-axis and
therefore hundreds of thousands of points.
The real solution of course is to calculate exactly where every piece
of text actually is, detect overlaps, and adjust. That is certainly
beyond my ability or inclination to implement. In the mean time, it
would be nice to have a simple "idiot-proof" flag that blindly fixes
some common problems.
On Fri, May 6, 2011 at 1:20 AM, Daniel Mader
wrote:
> Hi,
>
> almost every time I create a somewhat more complex figure I have to
> fight with the not too smart positioning of the plots and the size of
> margins around the axes. From many postings here I have learned that
> this is the absolute intention, i.e. it is broken by design unless the
> programmer takes care about this.
>
> I have to admin that I do not really get this idea. I am aware that
> the defaults will not change anytime soon and so I'd like to ask for
> an "idiot-proof" mode: this could be enabled by an rcParam and take
> care of proper dimensions, scale axis labels, titles, margins etc so
> that they don't cover.
>
> Here's an example for a matplotlib script which is a simple as it can
> get and demonstrates the broken layout which a user gets by default.
>
> import scipy
> import pylab
>
> x = scipy.linspace(-50,50, 100)
> y1 = scipy.rand(100)
> y2 = scipy.sin(x)
> y3 = y1 + y2
>
> fig = pylab.figure()
> ax1 = fig.add_subplot(311)
> ax2 = fig.add_subplot(312)
> ax3 = fig.add_subplot(313)
>
> ax1.plot(x, y1)
> ax2.plot(x, y2)
> ax3.plot(x, y3)
>
> ax1.set_title('some title')
> ax2.set_title('some title')
> ax3.set_title('some title')
>
> pylab.show()
>
> Of course, one can adjust the figsize but the results are still far
> from being adorable. The spacing around the sublplots increases for no
> apparent reason while the spacing between the subplot remains the same
> so that everything looks cramped...
>
>
> Thank you many times in advance,
> best regards,
>
> Daniel
>
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[Matplotlib-users] Subplot x-tick labels overlap with each other and with titles
Hi
Whenever I create figures with at least 3x3 subplots, the x-tick
labels overlap with each other and they also overlap with the title of
the adjacent subplot, rendering the entire figure illegible. I know
that I can fine-tune the plot to look exactly the way I want with
"wspace" and "hspace" for instance, but I don't understand why this is
the default behavior. I wonder if I have a system font issue, such
that matplotlib thinks the fonts are smaller than they really are.
My questions:
1) Is this the intended behavior of matplotlib, or is there something
wrong with my installation?
2) Assuming I don't have an installation issue, is there a very
general parameter I can change so that the overlap doesn't occur,
rather than manually adjusting every figure?
Minimal code to reproduce the problem:
import numpy as np
import matplotlib.pyplot as plt
plt.figure()
plt.subplot(331)
plt.subplot(334)
plt.plot(np.arange(1))
plt.title('Title')
plt.show()
I'm attaching the output figure, although I'm not sure if the list
accepts attachments. The x-tick labels on subplot 334 overlap each
other, and the title of subplot 334 overlaps with the x-tick labels in
subplot 331.
System:
Ubuntu 10.04 x64
All packages are the stable versions from Synaptic, including ipython,
python, numpy, matplotlib 0.99.1.1
I've also tried the Enthought distribution with matplotlib 1.0.1 and
the results are the same
I've tried both "Wx" and "Tk" backends and the results are the same
I've tried `matplotlib.rcParams['xtick.labelsize'] = 'x-small'`, and
this does make the labels smaller, but for sufficiently large numbers
the overlap still occurs.
Thanks for any help!
Chris
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[Matplotlib-users] MacOSX backend hangs
I'm running a recent build from source (last week) on OSX 10.6.6 and the Python 2.6.1 that ships with the OS. When I use the macosx backend, any plot that I generate results in a window that hangs. The Python dock icon bounces for awhile, then when it stops, the spinning beach ball appears and I am unable to interact with the window. I can, however, add plots to the window and update its contents with show(). This behaviour does not occur with other backends (e.g. TkAgg). I have tried switching interactive mode off in matplotlibrc, but this does not fix the problem. Thanks in advance for any ideas. -- Xperia(TM) PLAY It's a major breakthrough. An authentic gaming smartphone on the nation's most reliable network. And it wants your games. http://p.sf.net/sfu/verizon-sfdev ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
[Matplotlib-users] Access to contents of bins of a matplotlib histogram
Hi,
I would like to access values in the bins of a matplotlib histogram. The
following example script is an attempt to do this. Clearly pdf contains
floating point numbers, but I am unable to access them.
Help with this problem would be much appreciated.
Chris
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import numpy as np
import matplotlib.pyplot as plt
fig = plt.figure()
ax = fig.add_subplot(111)
mu, sigma = 100, 15
x = mu + sigma * np.random.randn(20)
#Generate the histogram of the data. Example from Matplotlib documentation
n, bins, patches = plt.hist(x, 50, normed=True, facecolor='g', alpha=0.75)
plt.xlabel('Smarts')
plt.ylabel('Probability')
plt.title('Histogram of IQ')
plt.text(60, .025, r'$\mu=100,\ \sigma=15$')
plt.axis([40, 160, 0, 0.03])
plt.grid(True)
#From Matplotlib documentation.
#normed: If True, the first element of the return tuple will be the counts
normalized
#to form a probability density, i.e., n/(len(x)*dbin). In a probability density,
#the integral of the histogram should be 1; you can verify that with a
trapezoidal
#integration of the probability density function.
pdf, bins, patches = ax.hist(x, 50, normed=True, facecolor='g', alpha=0.75)
#print pdf shows pdf contains the value in each bin of the normed histogram
print "pdf = ", pdf
print " Integration of PDF = ", np.sum(pdf * np.diff(bins))
#How to access values in pdf? Various tries made but none successful. Example
attempt shown
count=0
for line in open(pdf,'r+'):
x=pdf.readline()
z=('%.10f' % float(x))
count=count+1
print "count = ", count
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[Matplotlib-users] axis order in matplotlib?
Can anyone help me understand this: the code below produces a plot in
which the x and y axis labels are reversed relative to the direction in
which z varies on the plot, although the gradient arrows are correctly
oriented. Is there something I've missed in understanding the sense of
the x and y directions in mgrid, imshow, and gradient?
"""
x,y axes seem to be reversed
"""
import numpy as np
from matplotlib.pylab import *
dx = .25; dy = .25
xlen = 2.0; ylen = 2.0
x,y = np.mgrid[-xlen:xlen:dx, -ylen:ylen:dy] #also works with ogrid
z = x
hold(True)
imshow(z, origin='lower', extent=[-xlen,xlen,-ylen,ylen])
colorbar()
[u,v] = np.gradient(z)
u /= dx; v /= dy
QP = quiver(x,y,u,v,pivot='middle',color=[0.5,0.5,0.5])
quiverkey(QP, 0.85, 1.05, 1.0, '1 unit', labelpos='N')
xlabel('x')
ylabel('y')
title('slope')
show()
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[Matplotlib-users] Can't produce plots using Matplotlib
Recently I downloaded and installed Python(x,y) Version 2.6.5.6 running under Windows7 and now can't produce the plots that my programs produced under an earlier version of Python(x,y). The programs seem to run correctly and produce the same numerical results but I can't find the graphical output (if it exists). I presume that the problem isn caused by either an incorrect use of Matplotlib, an installation issue or my simply misunderstanding the use of Spyder. I would greatly appreciate some guidance on how to solve this problem. -- Index, Search & Analyze Logs and other IT data in Real-Time with Splunk Collect, index and harness all the fast moving IT data generated by your applications, servers and devices whether physical, virtual or in the cloud. Deliver compliance at lower cost and gain new business insights. Free Software Download: http://p.sf.net/sfu/splunk-dev2dev ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
[Matplotlib-users] sensible tick labels for log scale (rephrased)
Sorry for the lack of clarity in my last shot at this problem. What I want to be able to do is change a plot's axis to the log scale, then have some reasonable (i.e. evenly-spaced) tick labels generated automatically. I have tried to do this manually, but end up with the following: http://cl.ly/3h1T2i0a0T3X0K2b3W11 After Paul's answer to the original message, I have tried messing with the major_locator: ml = MultipleLocator(0.2) ax.xaxis.set_major_locator(ml) with different values for the MultipleLocator. Though the ticks do change, I only am able to see labels such as 10^0, 10^1, etc. -- I need better labels than that, such as [0, 0.3, 0.5, 1, 2, 4, 7] -- these are good values, because they are unlikely to overlap on the log scale. It will be a pain, however, to do this manually for every plot, so I am looking for a way to automate this somehow. I was hoping (and still hope) that Matplotlib is able to choose reasonable ticks on the log scale that do not overlap, but are more informative than just powers of 10. Hope that is clearer, cf -- Protect Your Site and Customers from Malware Attacks Learn about various malware tactics and how to avoid them. Understand malware threats, the impact they can have on your business, and how you can protect your company and customers by using code signing. http://p.sf.net/sfu/oracle-sfdevnl ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] sensible tick labels for log scale?
On Jan 12, 2011, at 10:33 PM, Paul Ivanov wrote: > In [50]: plt.loglog(1,1) > Out[50]: [] > > In [51]: ax = plt.gca() > > In [52]: loc = ax.xaxis.get_major_locator() > > In [53]: loc.numticks > Out[53]: 15 > > In [54]: loc.numticks = 10 Also, this approach does not seem to work in general for me. As an example: In [49]: loglog([1.341, 0.1034, 0.6076, 1.4278, 0.0374], : [0.37, 0.12, 0.22, 0.4, 0.08], 'o') In [50]: loc = ax.xaxis.get_minor_locator() In [51]: loc.numticks=10 In [52]: loc.numticks=5 This does nothing to change the number of minor ticks, and I tried the same thing for get_major_locator(), with the same result. The plot does not change at all. Thanks, cf -- Protect Your Site and Customers from Malware Attacks Learn about various malware tactics and how to avoid them. Understand malware threats, the impact they can have on your business, and how you can protect your company and customers by using code signing. http://p.sf.net/sfu/oracle-sfdevnl ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] closing figure inside a callback seg faults
On 10/15/10 5:16 PM, Paul Ivanov wrote:
> I want to do something like this:
>
>import matplotlib.pyplot as plt
>def onclick(event):
>if event.button==1:
> plt.close()
>fig = plt.gcf()
>cid = fig.canvas.mpl_connect('button_press_event', onclick)
>plt.show()
>
> I've tried several variations on this theme, but all of them cause
> crashes. Am I missing something?
>
> I'm using 1.0.0 with WXAgg
>
> thanks,
>
I don't know if MPL events do anything like this, but since you are
using wx, you could probably use wx.CallAfter() (or wx.CallLater(), call
one of those in your callback,a nd tehn have the function called close
the figure.
-Chris
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Re: [Matplotlib-users] Sigmoid Curve Fitting
Thank you. I'll try investigating Scipy further. I've already tried applying some least-squares code for Numpy (http://pingswept.org/2009/01/24/least-squares-polynomial-fitting-in-python/) to my sigmoid data, but it only seems to fit parabolas. I had already encountered zunzun.com while Googling the problem. I'm not sure what to make of it, although it seems to be an online curve-fitting service. Unfortunately, my usage requires the ability to run the process locally. Regards, Chris On Mon, Sep 20, 2010 at 6:35 PM, Gökhan Sever wrote: > On Mon, Sep 20, 2010 at 3:36 PM, Chris Spencer wrote: >> >> Hi, >> >> Does Matplotlib/Numpy/Scipy contain the ability to fit a sigmoid curve >> to a set of data points? > > You could also experiment at zunzun.com. Choose 2D sigmoidal from the 2D > function scroll list. > -- > Gökhan > -- Start uncovering the many advantages of virtual appliances and start using them to simplify application deployment and accelerate your shift to cloud computing. http://p.sf.net/sfu/novell-sfdev2dev ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
[Matplotlib-users] Sigmoid Curve Fitting
Hi, Does Matplotlib/Numpy/Scipy contain the ability to fit a sigmoid curve to a set of data points? Regards, Chris -- Start uncovering the many advantages of virtual appliances and start using them to simplify application deployment and accelerate your shift to cloud computing. http://p.sf.net/sfu/novell-sfdev2dev ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] matplotlib figure serialization
Michael Droettboom wrote: > What is the advantage of JSON (is this specific case) over Python source > code? matplotlib is designed around it and it's more flexible. Unless > you're planning on automatically manipulating the JSON, I don't see why > you wouldn't just use Python source. Indeed. There have been a few threads about this topic, and I think the consensus is that the way to auto-generate figures is with python. I don't think that there is any technical reason that one couldn't create a serialized version of an MPL figure in XML, or JSON, (or, for that matter, a python data structure), but it would be a fair bit of effort to write the code, and I don't think you'd get any real advantage over just using scripts -- you need a python script to create a figure in the first place, why not serialize that? -Chris -- Christopher Barker, Ph.D. Oceanographer Emergency Response Division NOAA/NOS/OR&R(206) 526-6959 voice 7600 Sand Point Way NE (206) 526-6329 fax Seattle, WA 98115 (206) 526-6317 main reception chris.bar...@noaa.gov -- Download Intel® Parallel Studio Eval Try the new software tools for yourself. Speed compiling, find bugs proactively, and fine-tune applications for parallel performance. See why Intel Parallel Studio got high marks during beta. http://p.sf.net/sfu/intel-sw-dev ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Contour Plotting of Varied Data on a Shape
Robert Kern wrote: >> the triangulation. Yes, it would use the existing delaunay code by >> default, and hopefully optionally use the not-as-good-a-license code the >> Robert Kern put in SciPy. > > I did what now? I thought you'd put a wrapper of a delaunay code that is GPL'd or something (not BSD compatible anyway) into a scikit or something? optional -- so it doesn't screw up licensing for those that don't want it. Anyway, the point is, for any code that might be put into MPL, we want a properly licensed compatible default, but ideally with the option of easily plug in in other, better, delaunay code that may not be license compatible. Now that I've written this, I really should go and look and see if I remember correctly: I've found this: http://scikits.appspot.com/delaunay Though I see no reference to license in there, so I presume it's under the same license as scipy. So I guess I was thinking of the natgrid toolkit, which I guess is not Robert's work, and is a substitute for nn interpolation, not triangulation. Sorry for writing too quickly. While I've got your attention, though -- I suspect you have looked for license compatible delaunay code and the stuff in the scikits package is as good as it gets? Thanks, -Chris -- Christopher Barker, Ph.D. Oceanographer Emergency Response Division NOAA/NOS/OR&R(206) 526-6959 voice 7600 Sand Point Way NE (206) 526-6329 fax Seattle, WA 98115 (206) 526-6317 main reception chris.bar...@noaa.gov -- Download Intel® Parallel Studio Eval Try the new software tools for yourself. Speed compiling, find bugs proactively, and fine-tune applications for parallel performance. See why Intel Parallel Studio got high marks during beta. http://p.sf.net/sfu/intel-sw-dev ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Contour Plotting of Varied Data on a Shape
Ian Thomas wrote: > To summarise, you recommend the following units of functionality: > > 1) Triangulation class to wrap existing delaunay code. The idea here is that it would provide a class that holds the result of the triangulation. Yes, it would use the existing delaunay code by default, and hopefully optionally use the not-as-good-a-license code the Robert Kern put in SciPy. In the future, I hope we can find a robust and well-licensed code -- I may be able to release some in-house code of ours for that some day. > 2) Separate the storage of and creation of contour sets so that you > can create your own. > 3) tricontour and tricontourf functions to contour a Triangulation. > 4) Python utility plotting functions for a Triangulation (triplot, > tripcolor, etc). > 5) Simple wrappers for 3 and 4 so you can just pass in the points and > the Triangulation is created for you behind the scenes. yup -- that all sounds great! > I am happy to make a start with this; wonderful! > no doubt it will take me a while. I should point out that I don't intend > to tinker with the > delaunay code, so we'll still left with those pathological cases > that it doesn't work with. Maybe this can be revisited when I'm done. hopefully, there still doesn't appear to be a really good delaunay code with a flexible license out there -- pity. > Do you want it all in one go, or one unit of functionality at a time > (my preference)? I don't see any reason to add it piecemeal, as long as the pieces are useful by themselves. > Let's see! I'll hold off starting until there have been some votes > for it from other people. hmm -- I wonder if a post to matplotlib-devel is in order. Most of those folks are on this list, to, but may not be following this thread. By the way, it sounds like your contouring code is in C++ -- is that important? I don't expect it should be that computationally expensive, though maybe hard to vectorize -- C++ does make portability harder, though there's a bunch in MPL already. If I was starting from scratch, I'd use Cython, if pure Python didn't cut it. -Chris -- Christopher Barker, Ph.D. Oceanographer Emergency Response Division NOAA/NOS/OR&R(206) 526-6959 voice 7600 Sand Point Way NE (206) 526-6329 fax Seattle, WA 98115 (206) 526-6317 main reception chris.bar...@noaa.gov -- Download Intel® Parallel Studio Eval Try the new software tools for yourself. Speed compiling, find bugs proactively, and fine-tune applications for parallel performance. See why Intel Parallel Studio got high marks during beta. http://p.sf.net/sfu/intel-sw-dev ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Contour Plotting of Varied Data on a Shape
Ian Thomas wrote: > I submitted some code to matplotlib-users last September to perform > contouring of triangular grids. The posts and code can be found at: > > http://sourceforge.net/mailarchive/forum.php?thread_name=4AB3B95B.3090903%40noaa.gov&forum_name=matplotlib-users > > Like I wrote at the time, if it is useful to enough people I'm happy > to improve the code provided it can be incorporated into mpl as I have > no interest in maintaining it as a standalone project. I think it would be great to have in MPL. What code are you using for the triangulation? Does it do constrained delauney? -Chris -- Christopher Barker, Ph.D. Oceanographer Emergency Response Division NOAA/NOS/OR&R(206) 526-6959 voice 7600 Sand Point Way NE (206) 526-6329 fax Seattle, WA 98115 (206) 526-6317 main reception chris.bar...@noaa.gov -- Download Intel® Parallel Studio Eval Try the new software tools for yourself. Speed compiling, find bugs proactively, and fine-tune applications for parallel performance. See why Intel Parallel Studio got high marks during beta. http://p.sf.net/sfu/intel-sw-dev ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] embedding a plot function in existing wxapp GUI, problem replotting
Pribadi, Krishna wrote: > Based on what I’ve been reading regarding MPL, it seems that the > matplotlib show() function causes another instance of a GUI loop to > remain suspended. right --don't use show(), in fact, don't use pylab for the most part: http://www.scipy.org/Cookbook/Matplotlib/EmbeddingInWx and see the "embedding_in_wx" examples as well. I personally like wxMPL: http://agni.phys.iit.edu/~kmcivor/wxmpl/ -Chris -- Christopher Barker, Ph.D. Oceanographer Emergency Response Division NOAA/NOS/OR&R(206) 526-6959 voice 7600 Sand Point Way NE (206) 526-6329 fax Seattle, WA 98115 (206) 526-6317 main reception chris.bar...@noaa.gov -- Download Intel® Parallel Studio Eval Try the new software tools for yourself. Speed compiling, find bugs proactively, and fine-tune applications for parallel performance. See why Intel Parallel Studio got high marks during beta. http://p.sf.net/sfu/intel-sw-dev ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
[Matplotlib-users] Setting Relative Heights For Figure Rows
I wanted to display my figure legend below my figure in the second row, so I used subplot(211) to create two rows. However, this creates two rows of equal height, so my graph is crammed into half the figure height in the first row, while my tiny legend barely fills up any of the second row. How do you specify relative heights of each row? For example, I'd like to specify the first row takes 80% of the figure height, while the second takes 20%. I've searched the docs, but I can't find anything. Is this possible? Regards, Chris -- This SF.Net email is sponsored by the Verizon Developer Community Take advantage of Verizon's best-in-class app development support A streamlined, 14 day to market process makes app distribution fast and easy Join now and get one step closer to millions of Verizon customers http://p.sf.net/sfu/verizon-dev2dev ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
[Matplotlib-users] Building matplotlib 0.99.1.1: cannot find -ltk8.5
Hi, I'm having trouble building matplotlib 0.99.1.1 (transcript below). I'm using copies of Python (2.5.1) and Tcl/Tk (8.5.5) that I have built myself, and that are apparently working fine. Previously, I was using this exact procedure to build 0.91.4 without any problems. Any suggestions would be greatly appreciated - thanks! Chris $ cd matplotlib-0.99.1.1 $ env PREFIX=/a/b/ LD_LIBRARY_PATH=/a/b/lib /a/b/bin/python setup.py build BUILDING MATPLOTLIB matplotlib: 0.99.1.1 python: 2.5.1 (r251:54863, Feb 5 2009, 13:11:08) [GCC 4.1.2 20071124 (Red Hat 4.1.2-42)] platform: linux2 REQUIRED DEPENDENCIES numpy: 1.2.1 freetype2: 9.10.3 OPTIONAL BACKEND DEPENDENCIES libpng: 1.2.10 Tkinter: Tkinter: 50704, Tk: 8.5, Tcl: 8.5 Gtk+: no * Building for Gtk+ requires pygtk; you must be able * to "import gtk" in your build/install environment Mac OS X native: no Qt: no Qt4: no Cairo: no OPTIONAL DATE/TIMEZONE DEPENDENCIES datetime: present, version unknown dateutil: matplotlib will provide pytz: matplotlib will provide adding pytz OPTIONAL USETEX DEPENDENCIES dvipng: 1.5 ghostscript: 8.15.2 latex: 3.141592 pdftops: 3.00 [Edit setup.cfg to suppress the above messages] pymods ['pylab'] packages ['matplotlib', 'matplotlib.backends', 'matplotlib.projections', 'mpl_toolkits', 'mpl_toolkits.mplot3d', 'mpl_too\ lkits.axes_grid', 'matplotlib.sphinxext', 'matplotlib.numerix', 'matplotlib.numerix.mlab', 'matplotlib.numerix.ma', 'matp\ lotlib.numerix.linear_algebra', 'matplotlib.numerix.random_array', 'matplotlib.numerix.fft', 'matplotlib.delaunay', 'pytz\ ', 'dateutil', 'dateutil/zoneinfo'] running build running build_py copying lib/matplotlib/mpl-data/matplotlibrc -> build/lib.linux-i686-2.5/matplotlib/mpl-data copying lib/matplotlib/mpl-data/matplotlib.conf -> build/lib.linux-i686-2.5/matplotlib/mpl-data running build_ext building 'matplotlib.backends._tkagg' extension g++ -pthread -shared build/temp.linux-i686-2.5/src/agg_py_transforms.o build/temp.linux-i686-2.5/src/_tkagg.o build/temp.\ linux-i686-2.5/CXX/cxx_extensions.o build/temp.linux-i686-2.5/CXX/cxxsupport.o build/temp.linux-i686-2.5/CXX/IndirectPyth\ onInterface.o build/temp.linux-i686-2.5/CXX/cxxextensions.o -L/usr/lib -L/usr/lib -L/usr/local/lib -L/usr/lib -L/usr/lib6\ 4 -L/usr/local/lib -L/usr/lib -L/usr/lib64 -ltk8.5 -ltcl8.5 -lstdc++ -lm -lfreetype -lz -lstdc++ -lm -o build/lib.linux-i\ 686-2.5/matplotlib/backends/_tkagg.so /usr/bin/ld: cannot find -ltk8.5 collect2: ld returned 1 exit status error: command 'g++' failed with exit status 1 make: *** [matplotlib] Error 1 $ ls /a/b/lib/*tk* lib/libtk8.5.so lib/libtkstub8.5.a lib/tkConfig.sh ... -- Come build with us! The BlackBerry® Developer Conference in SF, CA is the only developer event you need to attend this year. Jumpstart your developing skills, take BlackBerry mobile applications to market and stay ahead of the curve. Join us from November 9-12, 2009. Register now! http://p.sf.net/sfu/devconf ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] "Piecewise Cubic Hermite Interpolating Polynomial" in python
Thanks for the inputs... perhaps it will provide the impetus for future postings as well... chris On Aug 29, 2009, at 11:49 AM, John Hunter wrote: > On Sat, Aug 29, 2009 at 1:12 PM, Eric Firing > wrote: > >> This looks interesting. I successfully ran your program by using >> copy >> and paste to get it into a file, but for the future I certainly >> recommend that you attach such a file directly--file attachments >> generally work very well these days, but bad things can happen to >> code >> included as inline text. I haven't contributed to matplotlib or numpy even though I've used them for some years now, so I wasn't sure about the "etiquette" of file attachments. The other thing I recommend is do not use the pylab namespace for any > > of the numerics. pylab is getting all the numerical functions from > numpy, so if you > > import numpy as np > > and then refer to any numerical functions you need as np.somefunc. Point well taken. Since pylab exposes most of the numpy calls I use, I typically include pylab instead for nump. > > Finally, for the functions to be suitable for inclusion in a > production package like numpy or matplotlib.mlab, you should not use > any print statements in the function, but rather a combination of > warnings.warn or exceptions or if it for matplotlib, use the > verbose.report infrastructure. That way users can configure how much > verbosity they want, where the output should be directed, etc. Point also well taken. I figured out when there were problems, but even after 7 years of writing large Python package, I haven't found the best way to handle exceptions. Usually I purposely cause a "crash" so I don't miss the fact that the code had ill formed data. > > After a cleanup, you may want to check with numpy or scipy to see of > it could find a home there. There was a discussion at scipy on the > need to improve scipy.interpolate and this seems to go part of the way > toward that objective. So I would start there. I'll send it along to the scipy people. I figured since I figured out a relatively simple solution to a problem that is often encountered, it might find use even in its primitive form. I'll add the URLs to the WIkipedia references as well. > > JDH -- Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day trial. Simplify your report design, integration and deployment - and focus on what you do best, core application coding. Discover what's new with Crystal Reports now. http://p.sf.net/sfu/bobj-july ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] help needed in plotting curved elements
Sameer Regmi wrote: > We are working on plotting mesh (in > hermes2d: http://hpfem.math.unr.edu/projects/hermes2d-new/) > In the hermes2d examples curves are defined as [4, 7, 45] where 4,7 > are vertices indices, and 45 is center angle. > 1) matplot.path porvides a way to plot curve with three points > http://matplotlib.sourceforge.net/api/path_api.html#module-matplotlib.path This is a Bezier spline -- it can not exactly form a piece of a circle (though it can get pretty close). You can probably find the math somewhere for how to approximate a circle, but... > 2) matplot.patch.arc provides a way to plot an arc > > http://matplotlib.sourceforge.net/api/artist_api.html#module-matplotlib.patches > > but it needs > -> center of circle > -> start angle > -> end angle > -> radius of circle >we have to calculate all these with data available to us Since this actually plots s circle, I think it's a better bet. It should be pretty straightforward coordinate geometry to find those parameters from the ones you have -- and you only have to write that once! This page (or others like it) might help you get started: http://www.codecogs.com/reference/maths/analytical_geometry/the_coordinate_geometry_of_a_circle.php HTH, -Chris -- Christopher Barker, Ph.D. Oceanographer Emergency Response Division NOAA/NOS/OR&R(206) 526-6959 voice 7600 Sand Point Way NE (206) 526-6329 fax Seattle, WA 98115 (206) 526-6317 main reception chris.bar...@noaa.gov -- Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day trial. Simplify your report design, integration and deployment - and focus on what you do best, core application coding. Discover what's new with Crystal Reports now. http://p.sf.net/sfu/bobj-july ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Stopping Legend From Overlapping the Graph
Awesome, thanks. That works perfectly. Chris On Sun, Jun 28, 2009 at 12:16 AM, Jae-Joon Lee wrote: > sorry. > As guillaume has mentioned, you need to install mpl from svn. > > Here is some workaround you can try. I guess it would work with 0.98.5.3. > Basically, you create a separate axes for a legend. > > ax1 = axes([0.1, 0.2,0.8, 0.7]) > p1, = ax1.plot([1,2,3]) > p2, = ax1.plot([3,2,1]) > > ax2 = axes([0.1, 0.1, 0.8, 0.01], frameon=False) > ax2.xaxis.set_visible(False) > ax2.yaxis.set_visible(False) > l = ax2.legend([p1, p2], ["Legend1", "Legend2"], mode="expand", ncol=2, > borderaxespad=0.) > > > -JJ > > > > On Sat, Jun 27, 2009 at 6:00 PM, Chris Spencer wrote: >> Thanks. Is that some sort of blending edge feature? I just installed >> 0.98.5.3, but the sample code gives me the error: >> >> TypeError: __init__() got an unexpected keyword argument 'bbox_to_anchor' >> >> On Thu, Jun 25, 2009 at 10:20 PM, Jae-Joon Lee wrote: >>> The linked page below shows how you put the legend above the graph. >>> >>> http://matplotlib.sourceforge.net/users/plotting/legend.html#legend-location >>> >>> You can put it below the axes by adjusting the bbox_to_anchor parameter. >>> Try something like >>> bbox_to_anchor=(0., -0.1, 1., -0.1), loc=1 >>> >>> Make sure to adjust the suplot parameter (or axes location) to make >>> enough room for the legend. >>> >>> -JJ >>> >>> >>> >>> On Thu, Jun 25, 2009 at 9:22 PM, Chris Spencer wrote: >>>> How do you show the legend below the graph, so it doesn't overlap at >>>> all with the graph? The docs for the legend() "loc" parameter only >>>> seem to specify where *on* the graph you want it to show, which is >>>> driving me nuts because even using "best", it usually hides some of my >>>> data. >>>> >>>> I want to see *all* of my graph, as well as the legend. Is there any >>>> way to do this with pylab? >>>> >>>> Any help is appreciated. >>>> >>>> Chris >>>> >>>> -- >>>> ___ >>>> Matplotlib-users mailing list >>>> Matplotlib-users@lists.sourceforge.net >>>> https://lists.sourceforge.net/lists/listinfo/matplotlib-users >>>> >>> >> > -- ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Stopping Legend From Overlapping the Graph
Thanks. Is that some sort of blending edge feature? I just installed 0.98.5.3, but the sample code gives me the error: TypeError: __init__() got an unexpected keyword argument 'bbox_to_anchor' On Thu, Jun 25, 2009 at 10:20 PM, Jae-Joon Lee wrote: > The linked page below shows how you put the legend above the graph. > > http://matplotlib.sourceforge.net/users/plotting/legend.html#legend-location > > You can put it below the axes by adjusting the bbox_to_anchor parameter. > Try something like > bbox_to_anchor=(0., -0.1, 1., -0.1), loc=1 > > Make sure to adjust the suplot parameter (or axes location) to make > enough room for the legend. > > -JJ > > > > On Thu, Jun 25, 2009 at 9:22 PM, Chris Spencer wrote: >> How do you show the legend below the graph, so it doesn't overlap at >> all with the graph? The docs for the legend() "loc" parameter only >> seem to specify where *on* the graph you want it to show, which is >> driving me nuts because even using "best", it usually hides some of my >> data. >> >> I want to see *all* of my graph, as well as the legend. Is there any >> way to do this with pylab? >> >> Any help is appreciated. >> >> Chris >> >> -- >> ___ >> Matplotlib-users mailing list >> Matplotlib-users@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/matplotlib-users >> > -- ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
[Matplotlib-users] Stopping Legend From Overlapping the Graph
How do you show the legend below the graph, so it doesn't overlap at all with the graph? The docs for the legend() "loc" parameter only seem to specify where *on* the graph you want it to show, which is driving me nuts because even using "best", it usually hides some of my data. I want to see *all* of my graph, as well as the legend. Is there any way to do this with pylab? Any help is appreciated. Chris -- ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
[Matplotlib-users] Tutorial on working with Excel files in Python (without COM and cross platform!) at EuroPython 2009
Hi All, Too many people in the Python community *still* think the only way to work with Excel files in Python is using COM on Windows. To try and correct this, I'm giving a tutorial at this year's EuroPython conference in Birmingham, UK on Monday, 29th June that will cover working with Excel files in Python using the pure-python libraries xlrd, xlwt and xlutils. I'll be looking to cover: - Reading Excel Files Including extracting all the data types, formatting and working with large files. - Writing Excel Files Including formatting, many of the useful frilly extras and writing large excel files. - Modifying and Filtering Excel Files A run through of taking existing Excel files and modifying them in various ways. - Workshop for your problems I'm hoping anyone who attends will get a lot out of this! If you're planning on attending and have a particular problem you'd like to work on in this part of the tutorial, please drop me an email and I'll try and make sure I come prepared! All you need for the tutorial is a working knowledge of Excel and Python, with a laptop as an added benefit, and to be at EuroPython this year: http://www.europython.eu/ I look forward to seeing you all there! Chris -- Simplistix - Content Management, Zope & Python Consulting - http://www.simplistix.co.uk -- Crystal Reports - New Free Runtime and 30 Day Trial Check out the new simplified licensing option that enables unlimited royalty-free distribution of the report engine for externally facing server and web deployment. http://p.sf.net/sfu/businessobjects ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] help installing matplotlib
John Seales wrote: > I have an intel mac running os 10.4.11. I use python 2.6 > > I am trying to install matplotlib and I can't figure it out. Can anyone > help me? It's going to be a challenge -- numpy only recently supports 2.6 -- I"d go back to 2.5 if you can. -Chris -- Christopher Barker, Ph.D. Oceanographer Emergency Response Division NOAA/NOS/OR&R(206) 526-6959 voice 7600 Sand Point Way NE (206) 526-6329 fax Seattle, WA 98115 (206) 526-6317 main reception chris.bar...@noaa.gov -- Stay on top of everything new and different, both inside and around Java (TM) technology - register by April 22, and save $200 on the JavaOne (SM) conference, June 2-5, 2009, San Francisco. 300 plus technical and hands-on sessions. Register today. Use priority code J9JMT32. http://p.sf.net/sfu/p ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] [matplotlib-devel] What would you like to see in a book about Matplotlib?
On Sun, Feb 01, 2009 at 11:59:06PM +0100, Sandro Tosi wrote: > Hi Chris, > thanks for your reply, helpful as usual :) > > On Fri, Jan 30, 2009 at 18:59, Chris Walker > wrote: > > Firstly, good luck with the book. > > cheers :) > > > The sort of book I'd buy would explain how to use the combination of > > matplotlib/ipython/scipy/numpy to analyse data. > > Sadly, that would not the book I'll write :( The editor wanted to > target another audience for the book: experienced python developers, > with no knowledge of matplotlib; so an introductionary book, that will > show even how to integrate mpl on GTK/WX application and on the web. > > I pushed to have something about science, and a chapter will be about > that, but I need your (all) inputs, because my science days are long > back in the past ;) Sure - though anyone wanting to use matplotlib is likely to be acquiring, manipulating and then plotting data. > > >> - what are the (basic) things that, when you were beginning to use > >> matplotlib, you wanted to see grouped up but couldn't find? > >> - what would you like to see in a book about matplotlib? > > > > Start off by reading data from a file, plotting it and fitting a > > function to that data. > > That sounds something that could land in the "science" chapter. Indeed. > > > Plotting with related scales > > > > > > Sometimes it is useful to plot related scales on x1 and x2 axes. I've > > come across this several times in different contexts. In its simplest > > form, there is a linear relationship between the axes. In a mechanical > > test, you might want extension on the x1 axis and strain on the x2 axis > > (for example). > > > > Sometimes there is not a linear relationship. For example you might > > want to plot frequency (or photon energy) on x1 and wavelength on x2. > > > > An even more complex example is a Hall-Petch plot: > > > > (Yield Stress) = k/sqrt(Grain Size) > > > > So plotting 1/Sqrt(Grain Size) on the X1 axis gives a linear > > plot, but it would be useful to plot the grain size on the X2 scale. > > Err, I think I lost you ;) Figure 3b/3c at http://dcwww.camd.dtu.dk/~schiotz/papers/risoesymp/html/node3.html is an example - note that the y2 scale is not linear. > > What you want is 2 plots on the same figure? so not 2 Ys for the same > X 2 scales on the same figure, yes. > (let's say X is time, and Y1 is stock price variation, and Y2 is the > percentage change), you want X1-Y1 (let's say on the bottom-left) and > X2-Y2 (on the upper-right): did I get you? Exactly. http://en.wikipedia.org/wiki/File:Body_mass_index_chart.svg is the sort of thing I had in mind. > > > ipython and emacs > > - > > > > Suppose I want to write a script to analyse some data (perhaps I want > > a record of what I've done, or perhaps I'd like to perform the same > > analysis on several data sets). I'd probably do so in emacs - but it > > is useful to do some experimentation in ipython - tab completion is > > particularly useful. I feel there must be a good way to do my > > experimentation in ipython and save the important bits in emacs - but > > I've not sat down and worked out an efficient way of doing this. > > I think the preferred way to do so it using ipython, and for now I > plan only to show it on the book. Whether or not this make it into the book, I'm interested in how people do this. Surely you don't write your application using just ipython do you? > > > Data aqcuisition and experimental control: > > - > > > > Writing a simple application to acquire data - ideally from multiple > > sources and plot the data as it is acquired. In my case I wanted to > > combine mechanical with electrical tests. A couple of interesting > > articles by G Varoquaux are listed at > > http://wiki.debian.org/DebianScience/DataAcquisition > > > > This is perhaps beyond the scope of the book, but it has come up on > > the mailing lists a couple of times. The ideal application would have > > a gui for simple use, but a command line (probably ipython) for more > > more complex use - perhaps performing a series of tests under > > different conditions. > > I thought about an example for this already! :) Excellent. > I thought to develop a > sample application for GTK/WX that display some system value (like cpu > usage or so, in this way everyone can run the example) plotting the > information as it comes (for
Re: [Matplotlib-users] [matplotlib-devel] What would you like to see in a book about Matplotlib?
Note: Posted to matplotlib-devel and debian-science. Sandro, Firstly, good luck with the book. The sort of book I'd buy would explain how to use the combination of matplotlib/ipython/scipy/numpy to analyse data. > - what are you using matplotlib for? I want to use matplotlib/ipython/numpy/scipy for analysis of experimental data - plotting and fitting models to it. Also perhaps simulation of the data. I have also wanted to use matplotlib to plot data as it was acquired - see below. I've not really used matplotlib in anger - but am likely to do so in the future (and it would have been useful during my PhD had it been around then). > - what are the things you like the most of matplotlib, that you want > to give emphasis to? And why? Quality plots. The ability to add TeX labels. I've been keeping an eye on matplotlib for several years - it looks good. I really must spend some time exploring it. > - what are the (basic) things that, when you were beginning to use > matplotlib, you wanted to see grouped up but couldn't find? > - what would you like to see in a book about matplotlib? Start off by reading data from a file, plotting it and fitting a function to that data. Often, several scans are in the same data file. An elegant solution to reading data something like this example would be useful. # Scan: 1 # Time: 18:00 # Temperature: 21 # t data 1 12 2 33 3 14 4 40 5 60 # Scan: 2 # Time: 18:02 # Temperature: 30 # t data 1 22 2 33 3 44 4 55 And so on. Fitting a function to several data sets - with some of the parameters fitted to both sets of data and some not would be useful. > - what are some those advanced feature that made you yell "WOW!!" ? > - what are the things you'd like to explore of matplotlib and never > had time to do? Plotting with related scales Sometimes it is useful to plot related scales on x1 and x2 axes. I've come across this several times in different contexts. In its simplest form, there is a linear relationship between the axes. In a mechanical test, you might want extension on the x1 axis and strain on the x2 axis (for example). Sometimes there is not a linear relationship. For example you might want to plot frequency (or photon energy) on x1 and wavelength on x2. An even more complex example is a Hall-Petch plot: (Yield Stress) = k/sqrt(Grain Size) So plotting 1/Sqrt(Grain Size) on the X1 axis gives a linear plot, but it would be useful to plot the grain size on the X2 scale. ipython and emacs - Suppose I want to write a script to analyse some data (perhaps I want a record of what I've done, or perhaps I'd like to perform the same analysis on several data sets). I'd probably do so in emacs - but it is useful to do some experimentation in ipython - tab completion is particularly useful. I feel there must be a good way to do my experimentation in ipython and save the important bits in emacs - but I've not sat down and worked out an efficient way of doing this. Data aqcuisition and experimental control: - Writing a simple application to acquire data - ideally from multiple sources and plot the data as it is acquired. In my case I wanted to combine mechanical with electrical tests. A couple of interesting articles by G Varoquaux are listed at http://wiki.debian.org/DebianScience/DataAcquisition This is perhaps beyond the scope of the book, but it has come up on the mailing lists a couple of times. The ideal application would have a gui for simple use, but a command line (probably ipython) for more more complex use - perhaps performing a series of tests under different conditions. Some discussion of plotting non gridded 2d data should also be in there. > > Your suggestions are really appreciated :) And wish me good luck! I don't think it is the thrust of your book, but another book I was looking for is "A cookbook of Numerical simulations of classic physics/engineering problems". For use by physicists/engineers who don't want to rewrite things from scratch. Good luck. Chris -- This SF.net email is sponsored by: SourcForge Community SourceForge wants to tell your story. http://p.sf.net/sfu/sf-spreadtheword ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Tutorial on working with Excel files in Python(without COM and cross platform!) at PyConUS 2009
Derek Hohls wrote: > I hope I speak for others when I say: for those of us who cannot > be at PyCon, please consider making tutorials etc available for > download afterwards. We'd love to be able to spread the good > word about these excellent libraries. Keep an eye out on the PyConUS website after the conference, I believe they'll make the tutorials available there... cheers, Chris -- Simplistix - Content Management, Zope & Python Consulting - http://www.simplistix.co.uk -- This SF.net email is sponsored by: SourcForge Community SourceForge wants to tell your story. http://p.sf.net/sfu/sf-spreadtheword ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
[Matplotlib-users] Tutorial on working with Excel files in Python (without COM and cross platform!) at PyConUS 2009
Hi All, Too many people in the Python community think the only way to work with Excel files in Python is using COM on Windows. To try and correct this, I'm giving a tutorial at this year's PyCon in Chicago on Wednesday, 25th March that will cover working with Excel files in Python using the pure-python libraries xlrd, xlwt and xlutils. I'll be looking to cover: - Reading Excel Files Including formatting, unicode dates and formulae. - Writing Excel Files Including formatting with easyxf and things like freeze pains, print areas, etc - Filtering Excel Files A run through on the structure of xlutils.filter and some examples to show you how it works. - Workshop for your problems I'm hoping anyone who attends will get a lot out of this! If you're planning on attending and have a particular problem you'd like to work on in this part of the tutorial, please drop me an email and I'll try and make sure I come prepared! All you need for the tutorial is a working knowledge of Excel and Python, with a laptop as an added benefit, and to be at PyCon this year: http://us.pycon.org I look forward to seeing you all there! Chris -- Simplistix - Content Management, Zope & Python Consulting - http://www.simplistix.co.uk -- This SF.net email is sponsored by: SourcForge Community SourceForge wants to tell your story. http://p.sf.net/sfu/sf-spreadtheword ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
[Matplotlib-users] plot() cuts off long tick labels
Is there any way of preventing tick label names from being cut off by the plot canvas? Seems to happen every time: http://a3.s3.p.quickshareit.com/files/validationb0e66.png Thanks in advance. -- Chris Fonnesbeck Department of Mathematics and Statistics PO Box 56, University of Otago Dunedin, New Zealand -- This SF.net email is sponsored by: SourcForge Community SourceForge wants to tell your story. http://p.sf.net/sfu/sf-spreadtheword ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
[Matplotlib-users] plot() cuts off long tick labels
Is there any way of preventing tick label names from being cut off by the plot canvas? Seems to happen every time: http://a3.s3.p.quickshareit.com/files/validationb0e66.png Thanks in advance. -- Chris Fonnesbeck Department of Mathematics and Statistics PO Box 56, University of Otago Dunedin, New Zealand -- This SF.net email is sponsored by: SourcForge Community SourceForge wants to tell your story. http://p.sf.net/sfu/sf-spreadtheword ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
[Matplotlib-users] rotating plots
I am trying to produce a plot of data within a discrete number of
categories, such as data in a dict:
{'a':[0.3, 0.5], 'b':[0.9], 'c':[0.2, 0.4, 0.2]}
Except, rather than have the categories along the x-axis, and the
values on the y-axis, I need them the other way around. I know in the
boxplot() function, you can use the "vert" argument to tilt the plot
on its size (ie swap the axes), but is there an equivalent function
for other plots.
I guess what I'm looking for is a sideways boxplot, except plotting
the individual points, rather than the boxplot per se -- there are
only a small number of elements for each category, so a boxplot is not
appropriate.
Thanks in advance,
--
Chris Fonnesbeck
Department of Mathematics and Statistics
PO Box 56, University of Otago
Dunedin, New Zealand
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[Matplotlib-users] question about figsize keyword of figure(..)
I'm confused about what matplotlib.pyplot.figure(figsize = (a,b)) *means* It appears that the figure gets *bigger* as I make a and b *smaller* !??! Chris - This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Saved PDFs default to 4/3 aspect ratio even if do subplots_adjust?
On Mon, Oct 27, 2008 at 10:59:40AM -0400, Michael Droettboom wrote: > The size of the figure can be adjusted using > > figure(figsize=(width, height)) > > subplots_adjust merely adjusts the margins between multiple subplots > within the same figure. Thanks. subplots_adjust(left=.., bottom=...) seems to have an effect on a single plot too. It lets you add extra room for axis labels. It *must* mess up the aspect ratio of the plot since the axis labels are now "stealing" extra space right? Chris - This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Why is wrapper module called "pylab" ?
On Sun, Oct 26, 2008 at 11:51:48AM -0400, Charlie Moad wrote: > The matplotlib.pyplot is favored over the pylab module now. Thanks! I find your comment very interesting. As I have negligible experience with Matlab, I'd love to use matplotlib.pyplot. The problem is all the docs use pylab right? Where find matplotlib.pyplot examples? Chris - This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
[Matplotlib-users] Why is wrapper module called "pylab" ?
So is matplotlib the name of the low level plotting engine? And, pylab is the user-friendly wrapper? Would it be ok to call the whole system "Pylab" instead of Matplotlib then? Chris - This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
[Matplotlib-users] Saved PDFs default to 4/3 aspect ratio even if do subplots_adjust?
I measured the displayed Matplotlib PDF on the screen and noticed it has a 4/3 (1.333...) aspect ratio by default. Is it EXACTLY 4/3? Even if I do: pylab.figure().subplots_adjust(left = EXTRA_ROOM, bottom = EXTRA_ROOM) ??? (Why doesn't the subplots_adjust command seem to mess up the default aspect ratio?? ) Chris - This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] zorder seems to cause problems when embed python in latex files
On Tue, Oct 14, 2008 at 11:21:58PM +0300, Jouni K. Sepp?nen wrote: > Jouni K. Sepp?nen <[EMAIL PROTECTED]> writes: > > > 2008-03-23 Fix a pdf backend bug which sometimes caused the outermost > > gsave to not be balanced with a grestore. - JKS > > > > Can you upgrade to 0.91.4? > > Here's the relevant patch, in case applying it is more convenient than > upgrading: > > Index: lib/matplotlib/backends/backend_pdf.py > === > --- lib/matplotlib/backends/backend_pdf.py(revision 5017) > +++ lib/matplotlib/backends/backend_pdf.py(revision 5018) > @@ -1159,7 +1159,7 @@ > self.tex_font_map = None > > def finalize(self): > -self.gc.finalize() > +self.file.output(*self.gc.finalize()) > > def check_gc(self, gc, fillcolor=None): > orig_fill = gc._fillcolor Jouni thanks! you 1 line change appears to fix all! cs - This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] zorder seems to cause problems when embed python in latex files
On Tue, Oct 14, 2008 at 03:00:05PM -0400, Michael Droettboom wrote:
> With the file you sent, I can see the messed up footer in xpdf, but not
> in acroread. There are a number of times that I have seen xpdf not
> completely support the PDF spec, and this may be one of them.
I installed acroread and I was also able to view everything fine with it
whereas xpdf and evince showed the bug.
> Creating my own files, however, I'm not able to reproduce this here.
Hmmm. This would imply that your versions somehow do something that makes xpdf
happy.
> When I compile your test.tex, I get an error, even though it seems to
> have loaded the python.sty file. Not sure why (see attached log).
Looks like it doesn't know what \begin{python} means. Did you put python.sty
in the same directory as text.tex?
> When I generate the plots "offline", and then hack test.tex to simply
> include the files, everything works fine, and I don't see a problem with
> the footers with either xpdf or acroread.
I see the problem with xpdf when I simply include the plots which means that
python.sty was just a red herring. python.sty isn't the problem.
> There was a recent bug discovered in matplotlib where PDF files weren't
> always getting flushed completely. I don't *think* that's the cause of
> this, but if you could reproduce what I did (generate the plots
> independently of TeX and then load them), and that works for you, that
> might point to something like that.
xpdf still croaks for me. Perhaps using the bleeding edge of matplotlib would
fix? I'm using Ubuntu 8.04 which has python-matplotlib version
0.91.2-0ubuntu1.
> There was also a bug a few months back where xpdf didn't like the way
> matplotlib handled reusing the same graphic multiple times (which is
> used for markers). That may be why you're seeing the footer bug and I'm
> not -- you didn't mention which version of matplotlib you're running, so
> it's hard to say.
>
> Here's my versions of all the various moving pieces:
>> pdfTeX (Web2C 7.4.5) 3.14159-1.10b
>> kpathsea version 3.4.5
>> Copyright (C) 1997-2003 Han The Thanh.
> Beamer 3.00
> python 2.5.2
> matplotlib SVN (today)
> Acroread 8.1.1
> xpdf 3.00
Here is what I got:
Beamer 3.07-1
python 2.5.2
matplotlib 0.91.2-0ubuntu1
Acroread 8.1.2_SU1
xpdf 3.02-1.3ubuntu1
Ironically, all my stuff is newer than yours except for matplotlib. Sounds
like bleeding edge of matplotlib must be tried next.
> That python.sty stuff looks really cool, by the way. I haven't come
> across it before.
Glad I could help!
cs
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[Matplotlib-users] zorder seems to cause problems when embed python in latex files
LaTeX can accept embedded Python code with a python.sty file. This is handy to dynamically generate plots with Matplotlib for a LaTeX slide presentation. I successfully embedded lots of matplotlib plot code into my slides and then had problems with zorder. For some reason zorder seems to mess up the footer of my Beamer/LaTeX slides. (For some reason zorder setting make the footer shrink in size.) Is there any weirdness or side effects about zorder I should be aware of that would explain this? Chris - This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
[Matplotlib-users] plot chops off big Latex axis labels
The plot PDFs that matplotlib makes by default seem to be too tiny to contain my biggest axis labels and my poor Latex stuff is chopped in half. How fix? cs - This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Can't seem to plot 2 horizontal lines on same plot
On Tue, Oct 07, 2008 at 08:19:39AM -0400, Michael Droettboom wrote: > Did you not get an exception when you ran your example? > > The following works for me: > > import pylab > x1 = pylab.arange(-10, 10, 0.01) > x2 = pylab.arange( 0, 10, 0.01) > f1 = [0 for e in x1] > f2 = [1 for e in x2] > pylab.plot(x1, f1, x2, f2) > pylab.show() The lines aren't visible when I do it. No exceptions given. cs - This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Can't seem to plot 2 horizontal lines on same plot
On Tue, Oct 07, 2008 at 12:54:49PM +0200, Johann Rohwer wrote: > The autoscaling feature sets the y limits to [0,1] which means that > your lines are falling on the bottom and top x-axis which hides them. > Rescaling the y-axis will make the lines visible, e.g. > > pylab.ylim(-1,2) Thank you very much. That did it. cs - This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
[Matplotlib-users] Can't seem to plot 2 horizontal lines on same plot
I don't know what dumb thing I'm going but I can't seem to plot 2 horizontal lines on the same plot!!! Why does this snippet give a *BLANK* plot when I run it? (Either line separately seems to be ok!?!?) import pylab x1 = pylab.arange(-10, 10, 0.01) x2 = pylab.arange( 0, 10, 0.01) f1 = [0 for e in x1] f2 = [1 for e in x2] pylab.show(pylab.plot(x1, f1, x2, f2)) Chris - This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
[Matplotlib-users] multivariate scatter plots?
I'm trying to track down a function/recipe for generating a multivariate scatter plot. I'm thinking of something similar to what you get in R if you call plot on a multivariate data frame: http://mt11.quickshareit.com/share/rplotb1a70.pdf Is there anything obvious here? It seems like something that would get a lot of use, for exploring large datasets, etc. Thanks, cf - This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] OS X (Intel Mac) installation woes
Nathaniel Virgo <[EMAIL PROTECTED]> writes: > > Hi allI'm having trouble installing on OS X. The short story is it looks like something file is trying to build something for a ppc architecture when I'm on an Intel mac.Here's the long story:First I downloaded the matplotlib-0.99.3-py2.5-macosx-10.3.egg file but it complained that I didn't have numpy 1.1 as the version that comes with OS X is 1.0.1. Hi Nathaniel, I have an installer script that gives you recent builds of numpy, scipy and matplotlib, all installed from egg archives. It works well with MacPython, so you might want to try it: http://macinscience.com cf - This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Installation woes: phantom Numpy version?
> On Wed, Aug 6, 2008 at 5:02 PM, Richard Lawrence <[EMAIL PROTECTED]> wrote: >> My setup is: >> Mac Pro PPC G5, OS X 10.5.4 >> Python 2.5.1 (Apple build) >> Numpy 1.2.0.dev5615 -- ran svn update and rebuilt this morning >> REQUIRED DEPENDENCIES >> ~* numpy 1.1 or later is required; you have >> ~* 1.0.5.dev4673 Apple distributed a version of numpy with the system python, and set up sys.path so that their stuff would be found before site-packages, so you may be getting Apple's version of numpy rather than the one you built and installed. (I'm not running 10.5, so I can't supply details) There are ways to work around this -- a little googling should help you figure it out, but I recommend that you avoid the whole problem (and others) by installing python.org's build of 2.5.2, and go from there -- the binaries on the numpy site are built for that version. -Chris -- Christopher Barker, Ph.D. Oceanographer Emergency Response Division NOAA/NOS/OR&R(206) 526-6959 voice 7600 Sand Point Way NE (206) 526-6329 fax Seattle, WA 98115 (206) 526-6317 main reception [EMAIL PROTECTED] - This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
[Matplotlib-users] rationale for contour() argument dimensions?
I may be a bit thick, but I am having a heck of a time figuring out how to use contour() properly. Specifically, I do not see why the z dimension should be a 2d array. It should only take a set of x,y,z coordinates to produce a surface -- what is the extra dimension for? More importantly, how do I take "canonical" 3-d data, e.g.: x y z 1 1 2.3 1 2 4.5 1 3 6.1 2 1 7.3 . . . and get it into the form that matplotlib demands? Thanks, cf - Check out the new SourceForge.net Marketplace. It's the best place to buy or sell services for just about anything Open Source. http://sourceforge.net/services/buy/index.php ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
[Matplotlib-users] Adding labels to plots does not work
In a recent SVN build of matplotlib on OSX 10.5, I have created a boxplot
then tried to add labels to the axes afterwards. However, though the "xlabel"
and "ylabel" commands run without error, no labels are added to the plots.
In [45]: boxplot(transpose(transpose(relative_risk.trace())[:-2]))
In [46]: xlabel=("Option")
In [47]: ylabel=("Risk Reduction")
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Re: [Matplotlib-users] MPL, py2exe and fonts
Michael Droettboom wrote: > Chris Barker wrote: >> I'm successfully getting all the MPL data files into spy2exe with: >> >> DATA_FILES = matplotlib.get_py2exe_datafiles() >> >> The problem is that that dumps a LOT of stuff, and I don't need most >> of it. > The default text font is Vera.ttf. (If you want to support bold and > italic etc, you'll also need VeraBd.tff, VeraBI.ttf and VeraIt.ttf). I removed all other fonts, and it works fine, thanks! > Alternatively, you can change the default fonts in the matplotlibrc to > ones that are included with Windows (e.g. Arial) -- I took a look in matplotlibrc, and saw what looks like a html-ish cascade of fonts to look for, and Arial was in there. So I tried removing all the fonts, and behold, the system fonts were used. So now all I have in the mpl-data dir is matplotlibrc. Then I thought, I haven't changed any defaults in matplotlibrc, either, so I pulled that out. Now it runs fine, but when I close, I get an error box: see the logfile: and indeed there is a pH.exe.log file, and in there is: C:\Documents and Settings\chris.barker\My Documents\HAZMAT\SmallTools\phCalculator\trunk\dist\pH.exe\matplotlib\__init__.py:520: UserWarning: Could not find matplotlibrc; using defaults C:\Documents and Settings\chris.barker\My Documents\HAZMAT\SmallTools\phCalculator\trunk\dist\pH.exe\matplotlib\__init__.py:566: UserWarning: could not find rc file; returning defaults Is there a way to supress those warnings and not write the logfile? I've never really liked matplotlibrc -- it's kind of nice not to have it at all, and it doesn't seem to be required. Maybe this is a wx issue -- how to bury that warning. So then I tried removing mpl-data, but the app wouldn't run, I got an error, and the logfile says: Traceback (most recent call last): File "pH.py", line 8, in File "zipextimporter.pyo", line 82, in load_module File "Lib\Gui.pyo", line 15, in File "wxaddons\__init__.pyo", line 180, in import_hook File "zipextimporter.pyo", line 82, in load_module File "matplotlib\__init__.pyo", line 639, in File "matplotlib\__init__.pyo", line 562, in rc_params File "matplotlib\__init__.pyo", line 517, in matplotlib_fname File "matplotlib\__init__.pyo", line 207, in wrapper File "matplotlib\__init__.pyo", line 447, in _get_data_path_cached File "matplotlib\__init__.pyo", line 443, in _get_data_path RuntimeError: Could not find the matplotlib data files since I'm not, in fact needing any of the files in mpl-data, it might be nice if this error could be moved to when it's actually needed. I do notice that there is already a "if getattr(sys,'frozen',None)" stanza, so maybe we could tweak something there. This may all be a pain, and I suppose this approach would only work with the simplest of MPL apps (like mine), but it would be nice to clean up MPL so that it plays better with py2exe and the like. -Chris -- Christopher Barker, Ph.D. Oceanographer Emergency Response Division NOAA/NOS/OR&R(206) 526-6959 voice 7600 Sand Point Way NE (206) 526-6329 fax Seattle, WA 98115 (206) 526-6317 main reception [EMAIL PROTECTED] - This SF.net email is sponsored by the 2008 JavaOne(SM) Conference Don't miss this year's exciting event. There's still time to save $100. Use priority code J8TL2D2. http://ad.doubleclick.net/clk;198757673;13503038;p?http://java.sun.com/javaone ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
[Matplotlib-users] MPL, py2exe and fonts
Hi all, I'm successfully getting all the MPL data files into spy2exe with: DATA_FILES = matplotlib.get_py2exe_datafiles() The problem is that that dumps a LOT of stuff, and I don't need most of it. I've already added to my script a few lines that delete the "images" dir, but I'd like to trim down the fonts to just those I need. I'm using the wxAgg back-end, with all default fonts -- does anyone know which those are? MPL version: 0.91.2 on Windows (duh!) by the way, is there any way to dump that data into the exe itself, rather than requiring it to be carried alongside? This makes me really appreciate application bundles on the Mac! -Chris -- Christopher Barker, Ph.D. Oceanographer Emergency Response Division NOAA/NOS/OR&R(206) 526-6959 voice 7600 Sand Point Way NE (206) 526-6329 fax Seattle, WA 98115 (206) 526-6317 main reception [EMAIL PROTECTED] - This SF.net email is sponsored by the 2008 JavaOne(SM) Conference Don't miss this year's exciting event. There's still time to save $100. Use priority code J8TL2D2. http://ad.doubleclick.net/clk;198757673;13503038;p?http://java.sun.com/javaone ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] OSX build under universal python fails
Chris <[EMAIL PROTECTED]> writes: > > > > Based on recent emails, this looks like a problem attributed to the gcc > > version, not the python version. Suggested solutions are compile with > > the -Os flag or use gcc 4.2. > > > I think universal builds may have to > wait for another day, when gcc 4.2 is ready for prime time. > Actually, the -0s flag with gcc 4.0 seemed to work just fine. Thanks. - This SF.net email is sponsored by the 2008 JavaOne(SM) Conference Don't miss this year's exciting event. There's still time to save $100. Use priority code J8TL2D2. http://ad.doubleclick.net/clk;198757673;13503038;p?http://java.sun.com/javaone ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] OSX build under universal python fails
Eric Firing <[EMAIL PROTECTED]> writes: > > Chris, > > Based on recent emails, this looks like a problem attributed to the gcc > version, not the python version. Suggested solutions are compile with > the -Os flag or use gcc 4.2. > Hmm. The problem with using gcc 4.2 is that numpy does not seem to like it. I am also leery about using a developer preview of *anything* to build packages for distribution. I think universal builds may have to wait for another day, when gcc 4.2 is ready for prime time. - This SF.net email is sponsored by the 2008 JavaOne(SM) Conference Don't miss this year's exciting event. There's still time to save $100. Use priority code J8TL2D2. http://ad.doubleclick.net/clk;198757673;13503038;p?http://java.sun.com/javaone ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
[Matplotlib-users] OSX build under universal python fails
I'm trying to get a built of Matplotlib built under Python.org Python 2.5.2,
but get
the following build error, which did not occur under Leopard's
python:
src/_image.cpp: In member function ‘Py::Object _image_module::
from_images (const Py::Tuple&)’:
src/_image.cpp:848: error: insn does not satisfy its constraints:
(insn 2573 1070 2574 126 agg24/include/agg_color_rgba.h:268 (set
(mem:QI (plus:SI (reg/f:SI 6 bp)
(const_int -280 [0xfee8])) [0 SR.2970+0 S1 A8])
(reg:QI 5 di)) 56 {*movqi_1} (nil)
(nil))
src/_image.cpp:848: internal compiler error: in
reload_cse_simplify_operands, at postreload.c:391
Please submit a full bug report,
with preprocessed source if appropriate.
See http://developer.apple.com/bugreporter> for instructions.
error: command 'gcc' failed with exit status 1
Any idea as to what the problem may be?
Thanks in advance.
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[Matplotlib-users] How do you static link to freetype when building eggs?
I've had an ongoing problem building eggs of matplotlib that are statically linked to freetype. I thought I had it nailed, but evidently I do not. Here is my script: export CFLAGS="-arch i386 -I/Developer/src/libpng -I/Developer/src/freetype/include" export LDFLAGS="-arch i386 -L/Developer/src/libpng -L/Developer/src/freetype" rm -rf build python setupegg.py bdist_egg The build of freetype in /Developer/src/freetype does not even have dynamic libs built. The basedir dict in setupext.py contains the following entry for OSX: 'darwin' : [] However, when the resulting egg is installed by users, they still get the following error: ImportError: dlopen(/Library/Python/2.5/site-packages/matplotlib- 0.98pre-py2.5-macosx-10.5-i386.egg/matplotlib/ft2font.so, 2): Library not loaded: /usr/local/lib/libfreetype.6.dylib Referenced from: /Library/Python/2.5/site-packages/matplotlib-0.98pre-py2.5-macosx-10.5- i386.egg/matplotlib/ft2font.so Reason: image not found I thought I had my bases covered -- if anyone has some insight here, please let me know. maptlotlib is the only missing piece of the "superpack" of modules that I distribute for OSX. - This SF.net email is sponsored by the 2008 JavaOne(SM) Conference Don't miss this year's exciting event. There's still time to save $100. Use priority code J8TL2D2. http://ad.doubleclick.net/clk;198757673;13503038;p?http://java.sun.com/javaone ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
[Matplotlib-users] location of figure window
Hey All, Is there any way I can control the location that a tk figure window is shown on screen? I can control the size fine with: pylab.figure(figsize=(10,10)) ...but this produces a figure that, while it's the right size, is rendered with the top left of the window in the middle of the screen. If I can get it to be to-left, then it will all be visisble without me having to move it with a mouse ;-). Any ideas? Chris -- Simplistix - Content Management, Zope & Python Consulting - http://www.simplistix.co.uk - This SF.net email is sponsored by the 2008 JavaOne(SM) Conference Don't miss this year's exciting event. There's still time to save $100. Use priority code J8TL2D2. http://ad.doubleclick.net/clk;198757673;13503038;p?http://java.sun.com/javaone ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] matplotlib threadsafe?
Eric Firing wrote: > >> Out of interest, how does one tell MPL to "start a new figure and >> forget everything that's gone before"? > > You can minimize the amount of package and module-level state > information by using the oo interface: see examples/agg_oo.py. I tried this example, and it generates no output. Is that to be expected? cheers, Chris -- Simplistix - Content Management, Zope & Python Consulting - http://www.simplistix.co.uk - This SF.net email is sponsored by the 2008 JavaOne(SM) Conference Don't miss this year's exciting event. There's still time to save $100. Use priority code J8TL2D2. http://ad.doubleclick.net/clk;198757673;13503038;p?http://java.sun.com/javaone ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
[Matplotlib-users] plotting from a dictionary
Hey All,
I have a dictionary that maps date to a count (in this case the number
of false negatives from my spam filter) and I'm wondering how to best
plot something that looks like, say:
from datetime import date
data = {
date(2008,03,01):10,
date(2008,03,02):15,
date(2008,03,03):13,
}
I'm worried about getting the dates out in order such that I get a
straight line plot, rather than the zigzag back-and-forth line I reckon
I'd get if I did:
dates = []
count = []
for date,count in data.items:
dates.append(date)
count.append(count)
plot(dates,counts)
cheers,
Chris
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[Matplotlib-users] C++ Assertion failure during savefig
Hey, Up until recently I have been using mpl 0.90.1, and my application worked fine. Yesterday I upgraded to 0.91.2 and am now getting the following traceback: File "application. py", line 667, in plot radial_plot_figure.savefig(png_file, dpi=self.dpi) File "C:\Python25\Lib\site-packages\matplotlib\figure.py", line 770, in savefig self.canvas.print_figure(*args, **kwargs) File "C:\Python25\Lib\site-packages\matplotlib\backends\backend_wxagg.py", line 101, in print_figu re FigureCanvasAgg.print_figure(self, filename, *args, **kwargs) File "C:\Python25\Lib\site-packages\matplotlib\backend_bases.py", line 1202, in print_figure self.figure.canvas.draw() File "C:\Python25\Lib\site-packages\matplotlib\backends\backend_wxagg.py", line 65, in draw self.gui_repaint() File "C:\Python25\Lib\site-packages\matplotlib\backends\backend_wx.py", line 987, in gui_repaint drawDC.DrawBitmap(self.bitmap, 0, 0) File "C:\Python25\Lib\site-packages\wx-2.8-msw-unicode\wx\_gdi.py", line 3387, in DrawBitmap return _gdi_.DC_DrawBitmap(*args, **kwargs) PyAssertionError: C++ assertion "hdcDst && hdcSrc" failed at ..\..\src\msw\dc.cpp(2559) in AlphaBlt( ): AlphaBlt(): invalid HDC Does anyone have any suggestions to why this is happening? Thanks. - Check out the new SourceForge.net Marketplace. It's the best place to buy or sell services for just about anything Open Source. http://ad.doubleclick.net/clk;164216239;13503038;w?http://sf.net/marketplace ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] wxagg back-end bug on windows?
Chris Barker wrote: > Hi all, > > I'm having an odd issue with the wxAgg back-end: Update: If I remove: matplotlib/backends/_wxagg.pyd The problem goes away. It looks like that pyd is getting loaded even though I'm running wxPython2.8 However, now I get a non-valid png when I do savefig -Chris -- Christopher Barker, Ph.D. Oceanographer Emergency Response Division NOAA/NOS/OR&R(206) 526-6959 voice 7600 Sand Point Way NE (206) 526-6329 fax Seattle, WA 98115 (206) 526-6317 main reception [EMAIL PROTECTED] - Check out the new SourceForge.net Marketplace. It's the best place to buy or sell services for just about anything Open Source. http://ad.doubleclick.net/clk;164216239;13503038;w?http://sf.net/marketplace ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
[Matplotlib-users] wxagg back-end bug on windows?
Hi all,
I'm having an odd issue with the wxAgg back-end:
windows XP
python 2.5.2 (from python.org)
wxPython 2.8.7.1 unicode (binary from wxPython.org)
MPL 0.91.2 (binary from MPl site)
when I run:
import matplotlib
matplotlib.use('wxagg')
import pylab
I get a popup dialog:
"This application failed to start because wxmsw26uh_vc.dll was not found"
It looks like it is looking for a wxPython2.6 dll, which it doesn't
find, because I'm running wxPython2.8
I'm guessing this binary was compiled against wxPython2.6, but I thought
the current wxAgg back-end didn't try to use the accelerated module for
wxPython2.8.
Any ideas?
By the way, there are a number of other small bugs cropping up in the
pylab window with wxagg too -- but I'll look at those once I solve this.
Is no one else using MPL with wxPython2.8?
-Chris
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Re: [Matplotlib-users] [newbie] "live" plots of multiple lines
Matthias Michler wrote: > I'm not sure it is the easiest way, but it works for me: > > for label in ax.xaxis.get_majorticklabels(): > label.set_rotation(+90) Yes, that's what I was using, just wondered if there was a better way... >> Also, how would I get this kind of updating with bar charts or errorbars? > > In the case of bar charts and errorbars it is quite difficult to reset the > data. Oh, I also meant to ask about scatter, can the data be easilly reset there? For bar charts and errorbar plots, I agree ;-) How would I just blank the figure and replot? (I have just been calling errorbar lots, but I'm guessing that if I add a legend, I'll have one entry for each time I called errorbar :-S) cheers, Chris -- Simplistix - Content Management, Zope & Python Consulting - http://www.simplistix.co.uk - Check out the new SourceForge.net Marketplace. It's the best place to buy or sell services for just about anything Open Source. http://ad.doubleclick.net/clk;164216239;13503038;w?http://sf.net/marketplace ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] [newbie] "live" plots of multiple lines
Matthias Michler wrote: > I'm not sure that I understand you correctly. The code I refering is the one > which I attached some mails ago. The following works for me: Ah, okay, to get the problem I was having, change your script as follows: > - > from pylab import * > from datetime import datetime > from time import sleep > > ion() # interactive mode 'on' > figure() > ax = subplot(111, autoscale_on=True) > > x, y = [datetime.now()], [0] > line = plot(x, y, label="my_data")[0] > # get the line-object as the first > element > # of the tuple returned by plot > legend() > for i in arange(30): > x.append(datetime.now()) # append new values > y.append(i**2) > line.set_data(x,y)# reset data > ax.relim()# reset axes limits > ax.autoscale_view() # rescale axes > draw()# redraw current figure > sleep(0.3)# wait 0.3 seconds > > ioff() > show() So, basically make the x axis time instead of numbers. I think the problem is actually that the daets are quite long in their format. If they were rotated through 90 degress it'd likely be fine. How would I do this? Also, how would I get this kind of updating with bar charts or errorbars? cheers, Chris -- Simplistix - Content Management, Zope & Python Consulting - http://www.simplistix.co.uk - Check out the new SourceForge.net Marketplace. It's the best place to buy or sell services for just about anything Open Source. http://ad.doubleclick.net/clk;164216239;13503038;w?http://sf.net/marketplace ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] [newbie] "live" plots of multiple lines
Matthias Michler wrote: >>> the above script leads >>> to a different behaviour on my system. >> What is that behaviour and what version of matplotlib are you using? > > I think it is the expected behaviour. The number of xtick is aproximately > constant and some tick get sorted out, when the xlimits are increasing. > I'm using matplotlib-svn r5024 on Debian etch. Hmm, do you have a code snippet to demonstrate this? Maybe I'm missing some vital step that causes the axis to re-calculate its ticks? > sorry. I have no idea where this problems comes from. I have seen that using > idle and the latest release of matplotlib on and winxp, but I can't reproduce > it on my linux system. *sigh* ;-) Chris -- Simplistix - Content Management, Zope & Python Consulting - http://www.simplistix.co.uk - Check out the new SourceForge.net Marketplace. It's the best place to buy or sell services for just about anything Open Source. http://ad.doubleclick.net/clk;164216239;13503038;w?http://sf.net/marketplace ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] [newbie] "live" plots of multiple lines
Matthias Michler wrote:
My x-axis is time, and as new points are plotted, even though I'm
following the above recipe pretty closely, the x-tick spacing isn't
getting sorted out, so I end up with just a jumble as the tick labels
for the x-axis. Do you know why this might be?
I'm not sure I understand correctly, but if the number of xticks increases
dramatically (nobody could see the individual ticks),
Indeed, it looks like the Tick spacing is staying as it was when the
first point was plotted, so when hundreds more points are plotted, I
just get a jumble of labels on the x-axis.
the above script leads
to a different behaviour on my system.
What is that behaviour and what version of matplotlib are you using?
Shame I get that horrible exception when I do close the plot window,
wish I knew how to make it stop :-S
I don't know which exception you refer to, but sometimes if gives problems if
the interactive mode wasn't switched off ("ioff()") before the scripts ends
or "show()" is called.
If I run the attached script, and hit Ctrl-C in the DOS box running it,
I get:
C:\>python mpltest.py
Traceback (most recent call last):
File "mpltest.py", line 3, in
show()
File
"C:\Python25\Lib\site-packages\matplotlib\backends\backend_tkagg.py", li
e 76, in show
Tk.mainloop()
File "C:\Python25\lib\lib-tk\Tkinter.py", line 328, in mainloop
_default_root.tk.mainloop(n)
KeyboardInterrupt
Fatal Python error: PyEval_RestoreThread: NULL tstate
This application has requested the Runtime to terminate it in an unusual
way.
Please contact the application's support team for more information.
I've had a similar error when I hit the red cross in the corner of the
window with other scripts, although not this one :-S
cheers,
Chris
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from pylab import *
plot([1,2],[3,4])
show()
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Re: [Matplotlib-users] I really need help about installing matplotlib.
lovegf86 wrote: > What is the problem? > Do I need to update numpy? > Please help me, I am so desperate.. Install Python 2.5 from here: http://python.org/ftp/python/2.5.2/python-2.5.2.msi Install NumPy from here: http://downloads.sourceforge.net/numpy/numpy-1.0.4.win32-p3-py2.5.exe Install the windows binary for python 2.5 from here: http://downloads.sourceforge.net/matplotlib/matplotlib-0.91.2.win32-py2.5.exe Ignore the Enthought stuff ;-) cheers, Chris -- Simplistix - Content Management, Zope & Python Consulting - http://www.simplistix.co.uk - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Runtime Error
Hi Brook,
Brook Lin wrote:
> raise RuntimeError("'%s' is not a writable dir; you must set
> %s/.matplotlib to be a writable dir. You can also set environment variable
> MPLCONFIGDIR to any writable directory where you want matplotlib data stored
> "%h)
This is the crucial bit.
Looks like you've set MPLCONFIGDIR to a read-only dir, or the
.matplotlib in the current dir or .matplotlib in your home directory
aren't writeable by the user running your python script. (I'm doing a
bit of guesswork here...)
What is it that you're trying to do?
cheers,
Chris
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Re: [Matplotlib-users] [newbie] "live" plots of multiple lines
Hey Matthias, Matthias Michler wrote: > maybe something like the following helps you: > - > from pylab import * > from time import sleep > > ion() # interactive mode 'on' > figure() > ax = subplot(111, autoscale_on=True) > > x, y = [0], [0] > line = plot(x, y, label="my_data")[0] > # get the line-object as the first > element > # of the tuple returned by plot > legend() > for i in arange(10): > x.append(i) # append new values > y.append(i**2) > line.set_data(x,y)# reset data > ax.relim()# reset axes limits > ax.autoscale_view() # rescale axes > draw()# redraw current figure > sleep(0.5)# wait 0.5 seconds > > ioff() This is perfect, except for one little thing... My x-axis is time, and as new points are plotted, even though I'm following the above recipe pretty closely, the x-tick spacing isn't getting sorted out, so I end up with just a jumble as the tick labels for the x-axis. Do you know why this might be? > I don't know how to make this somehow interactive concerning the data input. > but maybe you save the data to a file and read them every 15 or 20 minutes. This isn't a problem, I just run in a "while True" loop and leave it running until I close the plot window. Shame I get that horrible exception when I do close the plot window, wish I knew how to make it stop :-S cheers, Chris -- Simplistix - Content Management, Zope & Python Consulting - http://www.simplistix.co.uk - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Plotting dates on the Y axis?
Kenneth Miller wrote: > > back in time. When i pass plot_dates timestamps for the y axis, and > integers for the x axis it simply displays the y-axis as floats. did you try: plot_dates(x,dates,ydate=True) ? Chris -- Simplistix - Content Management, Zope & Python Consulting - http://www.simplistix.co.uk - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] from pylab import nx?
Michael Droettboom wrote: > The "backend_driver.py" example runs a number of other examples using a > number of different backends. That's been a reasonably successful set > of regression and coverage tests. It's not perfect, but it's a start. > There are also some lower-level unit tests for frequently-reoccurring > bugs in the unit directory. Indeed, is there any kind of "full unit test" suite that a developer can run when changing things ot make sure they haven't fubarred anything? cheers, Chris -- Simplistix - Content Management, Zope & Python Consulting - http://www.simplistix.co.uk - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] plotting filled lines with missing data?
Pierre GM wrote: > Your data is indexed in time, right ? Your x-axis is a date object ? Then use > scikits.timeseries > http://scipy.org/scipy/scikits/wiki/TimeSeries I'm not sure what this is giving me. The dates are all python datetimes in a list already. The missing values started off as '', I turned those into nan and then created a ma with the nan's masked. What more would TimeSeries give me? > the link above. I must admit we didn't implement poly_between for timeseries. > Most likely, we'd have to implement it for regular masked arrays first, as > mentioned by Eric. OK. > What you could do is to fill your array with some kind of baseline, such as > 0, > or your minimum data, or wtvr. That's just a quick trick and no fix. Indeed, that's what I had to do. I have to admit, I see some interesting things while scanning that wiki page, but nothing that would have helped me... cheers, Chris (who might well be missing something...) -- Simplistix - Content Management, Zope & Python Consulting - http://www.simplistix.co.uk - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
