Re: [Matplotlib-users] How to keep only the x first terms of an array(numpy)?
On 1/30/12 3:50 PM, Fabien Lafont wrote: > Hello, > > Do somebody knows how to keep only the x first terms of a numpy 1D array? > > like > > a = array([8,4,5,7,9]) > function(a,2) >>>> [8,4] These questions belong on the numpy mailing list. You have already asked this question on scipy-user and received a correct answer. http://www.scipy.org/Mailing_Lists -- Robert Kern "I have come to believe that the whole world is an enigma, a harmless enigma that is made terrible by our own mad attempt to interpret it as though it had an underlying truth." -- Umberto Eco -- 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
Re: [Matplotlib-users] cannot import animation module
On 11/23/11 9:49 AM, Chao YUE wrote: > Dear all, > > I am using matplotlib 0.99.3 (I think it's the default version when I use sudo > apt-get install under ubuntu 11.04), but I don't have matplotlib.animation > module. I think I need to reinstall it? The animation module was added in matplotlib 1.1.0. You will have to install that version instead. -- Robert Kern "I have come to believe that the whole world is an enigma, a harmless enigma that is made terrible by our own mad attempt to interpret it as though it had an underlying truth." -- Umberto Eco -- All the data continuously generated in your IT infrastructure contains a definitive record of customers, application performance, security threats, fraudulent activity, and more. Splunk takes this data and makes sense of it. IT sense. And common sense. http://p.sf.net/sfu/splunk-novd2d ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] missing library animation from enthought distribution
On 11/22/11 9:40 AM, andrei barcaru wrote: > Hello > My name is Andrew and I'm working in University of Gerona, Spain. I've > installed > the entought distribution package on UBUNTU 11 32b OS . During the install I > was > asked by the shell if I want to create a folder .. so I did that, I've > created a > folder named pyth. Now .. when I'm trying to import matplotlib.animation as > animation for instance .. I get an error that the module animation is missing > . > And indeed in pyth/lib/python2.7/site-package/matplotlib/ there is no file > named > animation > Can you tell me please how can I update matplotlib to get the animation > package > installed. The current version of EPD contains matplotlib 1.0.1. The animation package was added in matplotlib 1.1.0. To get matplotlib 1.1.0 right now, you will have to build it yourself from sources. You can remove EPD's matplotlib 1.0.1 like so: $ enpkg --remove matplotlib -- Robert Kern "I have come to believe that the whole world is an enigma, a harmless enigma that is made terrible by our own mad attempt to interpret it as though it had an underlying truth." -- Umberto Eco -- All the data continuously generated in your IT infrastructure contains a definitive record of customers, application performance, security threats, fraudulent activity, and more. Splunk takes this data and makes sense of it. IT sense. And common sense. http://p.sf.net/sfu/splunk-novd2d ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] use matplotlib to produce mathathematical expression only
On Mon, May 16, 2011 at 09:23, Johannes Radinger wrote:
>
> Original-Nachricht
>> Datum: Mon, 16 May 2011 08:28:49 -0500
>> Von: Robert Kern
>> An: SciPy Users List
>> CC: matplotlib-users@lists.sourceforge.net
>> Betreff: Re: [Matplotlib-users] [SciPy-User] use matplotlib to produce
>> mathathematical expression only
>
>> On Mon, May 16, 2011 at 08:21, Johannes Radinger wrote:
>> > Hello,
>> >
>> > I want to produce a eps file of following mathematical expression:
>> >
>> r'$F(x)=p*\frac{1}{s1\sqrt{2\pi}}*e^{-\frac{1}{2}*(\frac{x-m}{s1})}+(1-p)*\frac{1}{s1\sqrt{2\pi}}*e^{-\frac{1}{2}*(\frac{x-m}{s1})}$'
>> >
>> > is it possible to somehow missuse matplotlib for that to produce only
>> the function without any other plot things? Or is there a better python
>> library within scipy? I don't want to install the complete latex libraries
>> just
>> for producing this single eps file.
>>
>> Check out mathtex. It is matplotlib's TeX parsing engine and renderer
>> broken out into a separate library:
>>
>> http://code.google.com/p/mathtex/
>
> I also thought about mathtex but don't know how to use my mathematical
> expression without a plot of axis etc. any suggestions? I just want to have
> the formated math expression as eps and I don't know how to do it, still
> after reading in the matplotlib-manual.
The mathtex that I link to above is a separate library, not a part of
matplotlib. Please follow the link.
--
Robert Kern
"I have come to believe that the whole world is an enigma, a harmless
enigma that is made terrible by our own mad attempt to interpret it as
though it had an underlying truth."
-- Umberto Eco
--
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Re: [Matplotlib-users] [SciPy-User] use matplotlib to produce mathathematical expression only
On Mon, May 16, 2011 at 08:21, Johannes Radinger wrote:
> Hello,
>
> I want to produce a eps file of following mathematical expression:
> r'$F(x)=p*\frac{1}{s1\sqrt{2\pi}}*e^{-\frac{1}{2}*(\frac{x-m}{s1})}+(1-p)*\frac{1}{s1\sqrt{2\pi}}*e^{-\frac{1}{2}*(\frac{x-m}{s1})}$'
>
> is it possible to somehow missuse matplotlib for that to produce only the
> function without any other plot things? Or is there a better python library
> within scipy? I don't want to install the complete latex libraries just for
> producing this single eps file.
Check out mathtex. It is matplotlib's TeX parsing engine and renderer
broken out into a separate library:
http://code.google.com/p/mathtex/
Also, please send matplotlib questions just to the matplotlib list. Thanks.
--
Robert Kern
"I have come to believe that the whole world is an enigma, a harmless
enigma that is made terrible by our own mad attempt to interpret it as
though it had an underlying truth."
-- Umberto Eco
--
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What every C/C++ and Fortran developer should know.
Learn how Intel has extended the reach of its next-generation tools
to help boost performance applications - inlcuding clusters.
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Re: [Matplotlib-users] Possible memory leak?
On 11/18/10 5:05 PM, John Hunter wrote: > On Thu, Nov 18, 2010 at 2:20 PM, Benjamin Root wrote: > >> Interesting analysis. One possible source of a leak would be some sort of >> dangling reference that still hangs around even though the plot objects have >> been cleared. By the time of the matplotlib 1.0.0 release, we did seem to >> clear out pretty much all of these, but it is possible there are still some >> lurking about. We should probably run your script against the latest svn to >> see how the results compare. > > In our experience, many of the GUI backends have some leak, and these > are in the GUI and not in mpl. Caleb, can you see if you can > replicate the leak with your example code using the agg backend (no > GUI). If so, could you post the code that exposes the leak. if not, > I'm afraid it is in wx and you might need to deal with the wx > developers. Heh. Good timing! I just fixed a bug in Chaco involving a leaking cycle that the garbage collector could not clean up. The lesson of my tale of woe is that even if there is no leak when you run without wxPython, that doesn't mean that wxPython is the culprit. If any object in the connected graph containing a cycle (even if it does not directly participate in the cycle) has an __del__ method in pure Python, then the garbage collector will not clean up that cycle for safety reasons. Read the docs for the gc module for details. We use SWIG to wrap Agg and SWIG adds __del__ methods for all of its classes. wxPython uses SWIG and has the same problems. If there is a cycle which can reach a wxPython object, the cycle will leak. The actual cycle may be created by matplotlib, though. You can determine if this is the case pretty easily, though. Call gc.collect() then examine the list gc.garbage. This will contain all of those objects with a __del__ that prevented a cycle from being collected. I recommend using objgraph to diagram the graph of references to those objects. It's invaluable to actually see what's going on. http://pypi.python.org/pypi/objgraph -- Robert Kern "I have come to believe that the whole world is an enigma, a harmless enigma that is made terrible by our own mad attempt to interpret it as though it had an underlying truth." -- Umberto Eco -- Beautiful is writing same markup. Internet Explorer 9 supports standards for HTML5, CSS3, SVG 1.1, ECMAScript5, and DOM L2 & L3. Spend less time writing and rewriting code and more time creating great experiences on the web. Be a part of the beta today http://p.sf.net/sfu/msIE9-sfdev2dev ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] matplotlib.delauney with periodic boundary conditions
On 10/22/10 6:28 AM, Matthew Matic wrote: > > I'm trying to get a delaunay triangulation of a set of points on the surface > of the torus. I'm using matplotlib.delaunay, but it seems to only give the > triangulation for a flat surface. Is there any way to tell it to take the > periodic boundary conditions into account, or alter the points I input such > that matplotlib.delaunay interprets them as being on the surface of the > torus. Having said that, assuming your points are reasonably dense, then you can simply repeat your points 9 (or 25) times in a tiled grid, then pull out the center. That's probably close enough. There's some bookkeeping left as an exercise for the reader, but it's nothing unreasonable. -- Robert Kern "I have come to believe that the whole world is an enigma, a harmless enigma that is made terrible by our own mad attempt to interpret it as though it had an underlying truth." -- Umberto Eco -- Nokia and AT&T present the 2010 Calling All Innovators-North America contest Create new apps & games for the Nokia N8 for consumers in U.S. and Canada $10 million total in prizes - $4M cash, 500 devices, nearly $6M in marketing Develop with Nokia Qt SDK, Web Runtime, or Java and Publish to Ovi Store http://p.sf.net/sfu/nokia-dev2dev ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] matplotlib.delauney with periodic boundary conditions
On 10/22/10 6:28 AM, Matthew Matic wrote: > > I'm trying to get a delaunay triangulation of a set of points on the surface > of the torus. I'm using matplotlib.delaunay, but it seems to only give the > triangulation for a flat surface. Is there any way to tell it to take the > periodic boundary conditions into account, or alter the points I input such > that matplotlib.delaunay interprets them as being on the surface of the > torus. No, there isn't. -- Robert Kern "I have come to believe that the whole world is an enigma, a harmless enigma that is made terrible by our own mad attempt to interpret it as though it had an underlying truth." -- Umberto Eco -- Nokia and AT&T present the 2010 Calling All Innovators-North America contest Create new apps & games for the Nokia N8 for consumers in U.S. and Canada $10 million total in prizes - $4M cash, 500 devices, nearly $6M in marketing Develop with Nokia Qt SDK, Web Runtime, or Java and Publish to Ovi Store http://p.sf.net/sfu/nokia-dev2dev ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] CMYK images
On 8/26/10 3:26 PM, Fernando Perez wrote: > On Thu, Aug 26, 2010 at 11:39 AM, Eric Firing wrote: >> It's not trivial. This might help: >> >> http://www.littlecms.com/ >> >> See the tutorial for some nice background info. > > And this could be a good start for a python-based workflow: > > http://www.cazabon.com/pyCMS/ > > *if* it works (it looks old, so it may have bit-rotted in the meantime). > > Another option would be to ctypes-wrap the calls of littleCMS one > needs just for this and be done with it. Not very elegant, but it > might get the OP out of a bind with minimal work, and he'd have a > little eps2cmyk.py script he could run on his MPL-generated EPS files > for colorspace conversion. Just an afternoon hack. :) You can also use my numpy-aware wrappers: http://www.enthought.com/~rkern/cgi-bin/hgwebdir.cgi/lcms/ -- Robert Kern "I have come to believe that the whole world is an enigma, a harmless enigma that is made terrible by our own mad attempt to interpret it as though it had an underlying truth." -- Umberto Eco -- Sell apps to millions through the Intel(R) Atom(Tm) Developer Program Be part of this innovative community and reach millions of netbook users worldwide. Take advantage of special opportunities to increase revenue and speed time-to-market. Join now, and jumpstart your future. http://p.sf.net/sfu/intel-atom-d2d ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] how to plot the empirical cdf of an array?
On 7/9/10 10:31 AM, per freem wrote: > Also, I am not sure how to use alan's code. > > If I try: > > ec = empirical_cdf(my_data) > plt.plot(ec) > > it doesn't actually look like a cdf Make sure my_data is sorted first. plt.plot(my_data, ec) You probably want to use one of the "steps" linestyles; I'm not sure which one would be best. It probably doesn't matter much. -- Robert Kern "I have come to believe that the whole world is an enigma, a harmless enigma that is made terrible by our own mad attempt to interpret it as though it had an underlying truth." -- Umberto Eco -- This SF.net email is sponsored by Sprint What will you do first with EVO, the first 4G phone? Visit sprint.com/first -- http://p.sf.net/sfu/sprint-com-first ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] how to plot the empirical cdf of an array?
On 7/9/10 10:02 AM, per freem wrote: > I'd like to clarify: I want the empirical cdf, but I want it to be > normalized. There's a normed=True option to plt.hist but how can I do > the equivalent for CDFs? There is no such thing as a normalized empirical CDF. Or rather, there is no such thing as an unnormalized empirical CDF. Alan's code is good. Unless if you have a truly staggering number of points, there is no reason to bin the data first. -- Robert Kern "I have come to believe that the whole world is an enigma, a harmless enigma that is made terrible by our own mad attempt to interpret it as though it had an underlying truth." -- Umberto Eco -- This SF.net email is sponsored by Sprint What will you do first with EVO, the first 4G phone? Visit sprint.com/first -- http://p.sf.net/sfu/sprint-com-first ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] ipython pylab switch, GDAL, Enthought
On 2010-04-13 16:55 PM, K.-Michael Aye wrote: > Trying Unison via the GMane NNTP now, but weird that nabble has your > last answer already for long time, whereas GMane still does not show > it. Does the NNTP pull the mailing lists on a low frequency. The latency is variable, but it's been getting pretty bad recently. -- Robert Kern "I have come to believe that the whole world is an enigma, a harmless enigma that is made terrible by our own mad attempt to interpret it as though it had an underlying truth." -- Umberto Eco -- 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] ipython pylab switch, GDAL, Enthought
On 2010-04-13 11:13 AM, K. -Michael Aye wrote: >> >> On 2010-04-13 10:18 AM, K. -Michael Aye wrote: >>> Dear all, >>> >>> maybe this should go to the Enthought list, but as the failure is directly >>> related to the pylab switch of ipython, I thought I try it here first: >>> >>> On OSX I have trouble with using the pylab switch for ipython after I >>> copied the gdal.pth into the Enthought site-packages folder (to be able to >>> use my KyngChaos GDAL Frameworks inside the Enthought Python). >>> >>> The gdal.pth does the following to the sys.path: >>> import sys; >>> sys.path.insert(0,'/Library/Frameworks/GDAL.framework/Versions/1.7/Python/site-packages') >>> >>> and in that folder there is: >>> >>> -rw-rw-r-- 1 root admin 128B 8 Feb 20:52 gdal.py >>> -rw-r--r-- 1 root admin 274B 3 Mar 23:20 gdal.pyc >>> -rw-rw-r-- 1 root admin 143B 8 Feb 20:52 gdalconst.py >>> -rw-r--r-- 1 root admin 304B 3 Mar 23:20 gdalconst.pyc >>> -rw-rw-r-- 1 root admin 147B 8 Feb 20:52 gdalnumeric.py >>> -rw-r--r-- 1 root admin 309B 3 Mar 23:20 gdalnumeric.pyc >>> drwxrwxr-x 42 root admin 1.4K 3 Mar 23:20 numpy >>> -rw-rw-r-- 1 root admin 125B 8 Feb 20:52 ogr.py >>> -rw-r--r-- 1 root admin 286B 3 Mar 23:20 ogr.pyc >>> drwxrwxr-x 21 root admin 714B 3 Mar 23:20 osgeo >>> -rw-rw-r-- 1 root admin 125B 8 Feb 20:52 osr.py >>> -rw-r--r-- 1 root admin 286B 3 Mar 23:20 osr.pyc >>> >>> Maybe the double import of a potentially different numpy compared to the >>> Enthought numpy creates the Bus Error? >> >> Not so much a double import. Only one version ever gets imported, but the >> GDAL >> Python bindings expect its version and matplotlib expects another version. >> >>> If so, how can I avoid it? >> >> You would have to rebuild the GDAL Python bindings against Enthought's numpy. >> > But why does everything work fine, when I start an Enthought ipython withOUT > the -pylab switch? > Importing 'from osgeo import gdal' and using it works fine in this case > (Tried ReadAsArray from a gdal dataset and imshow'ed it without problems, > apart from that I had to call show() because of the lack of the -pylab > switch, but other than that, fine). Hmm, don't know. Getting a gdb traceback for the bus error would help identify the problem. > PS.: Sorry for the mail-list noob question, but how can I nicely reply to > your answer like you replied to my question, with 'Robert Kern wrote' and so > on? There's no reply possible on sourceforge and the digest contains > obviously many emails, so how do you do this? ;) I use an NNTP newsreader to read this list via GMane, but you can just change your subscription to not use the digest. Scroll down to the bottom of this page to log in and edit your delivery options: https://lists.sourceforge.net/lists/listinfo/matplotlib-users You will get every message in your inbox individually. You should do this if you are going to be replying to messages. Please consider the digest as read-only. -- Robert Kern "I have come to believe that the whole world is an enigma, a harmless enigma that is made terrible by our own mad attempt to interpret it as though it had an underlying truth." -- Umberto Eco -- 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] ipython pylab switch, GDAL, Enthought
On 2010-04-13 10:18 AM, K. -Michael Aye wrote: > Dear all, > > maybe this should go to the Enthought list, but as the failure is directly > related to the pylab switch of ipython, I thought I try it here first: > > On OSX I have trouble with using the pylab switch for ipython after I copied > the gdal.pth into the Enthought site-packages folder (to be able to use my > KyngChaos GDAL Frameworks inside the Enthought Python). > > The gdal.pth does the following to the sys.path: > import sys; > sys.path.insert(0,'/Library/Frameworks/GDAL.framework/Versions/1.7/Python/site-packages') > > and in that folder there is: > > -rw-rw-r-- 1 root admin 128B 8 Feb 20:52 gdal.py > -rw-r--r-- 1 root admin 274B 3 Mar 23:20 gdal.pyc > -rw-rw-r-- 1 root admin 143B 8 Feb 20:52 gdalconst.py > -rw-r--r-- 1 root admin 304B 3 Mar 23:20 gdalconst.pyc > -rw-rw-r-- 1 root admin 147B 8 Feb 20:52 gdalnumeric.py > -rw-r--r-- 1 root admin 309B 3 Mar 23:20 gdalnumeric.pyc > drwxrwxr-x 42 root admin 1.4K 3 Mar 23:20 numpy > -rw-rw-r-- 1 root admin 125B 8 Feb 20:52 ogr.py > -rw-r--r-- 1 root admin 286B 3 Mar 23:20 ogr.pyc > drwxrwxr-x 21 root admin 714B 3 Mar 23:20 osgeo > -rw-rw-r-- 1 root admin 125B 8 Feb 20:52 osr.py > -rw-r--r-- 1 root admin 286B 3 Mar 23:20 osr.pyc > > Maybe the double import of a potentially different numpy compared to the > Enthought numpy creates the Bus Error? Not so much a double import. Only one version ever gets imported, but the GDAL Python bindings expect its version and matplotlib expects another version. > If so, how can I avoid it? You would have to rebuild the GDAL Python bindings against Enthought's numpy. -- Robert Kern "I have come to believe that the whole world is an enigma, a harmless enigma that is made terrible by our own mad attempt to interpret it as though it had an underlying truth." -- Umberto Eco -- 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
On 2010-03-11 15:49 PM, Chris Barker wrote: > 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. Instead of addressing the misconceptions point by point, let me just lay out the situation: natgrid is a GPLed library for doing Delaunay triangulation and natural neighbor interpolation. The author is presumed to be deceased, so this code will always be GPLed. It seems to fail less often when doing the Delaunay triangulation on datasets in the wild; however, it is not using robust geometric primitives, so there probably still are cases where it fails. I wrote a BSD library for doing natural neighbor interpolation using the Delaunay triangulation code using the sweepline algorithm. This algorithm does not (and cannot) use robust geometric primitives, so there are datasets for which it fails to produce a valid triangulation. This is the code in scikits.delaunay. I have not pushed it to a 1.0 release because of this issue. However, this *was* put into matplotlib. matplotlib can optionally use natgrid if it is installed. > 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? Pretty much. I do have some code for constructing the Delaunay triangulation using robust primitives and an insertion algorithm, but it is an order of magnitude slower than scikits.delaunay. Ideally, we would be able to find or write a divide-and-conquer algorithm using Jon Shewchuk's robust geometric primitives. -- Robert Kern "I have come to believe that the whole world is an enigma, a harmless enigma that is made terrible by our own mad attempt to interpret it as though it had an underlying truth." -- Umberto Eco -- 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
On 2010-03-11 13:38 PM, Chris Barker wrote: > 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. I did what now? -- Robert Kern "I have come to believe that the whole world is an enigma, a harmless enigma that is made terrible by our own mad attempt to interpret it as though it had an underlying truth." -- Umberto Eco -- 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] Bug: string.letters
On 2010-03-09 12:37 PM, Eric Firing wrote: > Eric Firing wrote: >> Tony S Yu wrote: >>> On Mar 9, 2010, at 1:22 PM, John Hunter wrote: >>> >>>> On Tue, Mar 9, 2010 at 12:16 PM, Eric Firing wrote: >>>> >>>>> Bizarre! I can reproduce it with python 2.6 (ubuntu 9.10) and mpl from >>>>> svn. I have done a little grepping and other exploration, but have >>>>> completely failed to find where this change is occurring. >>>> >>>> cbook imports locale -- may be implicated: >>>> >>>> string.letters¶ >>>> The concatenation of the strings lowercase and uppercase described >>>> below. The specific value is locale-dependent, and will be updated >>>> when locale.setlocale() is called. >>>> >>>> See if simply importing locale first has the same effect. >>> >>> It seems to be an interaction between numpy and locale. I can reproduce the >>> problem with: >>> >>>>>> import locale >>>>>> import numpy as np >>>>>> preferredencoding = locale.getpreferredencoding() >> >> cbook also calls locale.getpreferredencoding() when it is imported. > > Confirmation: > > In [1]:import string > > In [2]:string.letters > Out[2]:'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ' > > In [3]:import locale > > In [4]:locale.getpreferredencoding () > Out[4]:'UTF-8' > > In [5]:string.letters > Out[5]:'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz' PyGTK calls locale.setlocale() and thus may be affecting string.letters. > The lesson seems to be that the only proper use for string.letters is > for testing membership, in which case the order does not matter. Yes. -- Robert Kern "I have come to believe that the whole world is an enigma, a harmless enigma that is made terrible by our own mad attempt to interpret it as though it had an underlying truth." -- Umberto Eco -- 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] Trouble gridding irregularly spaced data
On 2010-02-16 00:40 AM, T J wrote: > Hi, > > I'm trying to grid irregularly spaced data, such that the convex hull > of the data is not rectangular. Specifically, all my data lies in an > equilateral triangle inside the unit circle. I found: > > > http://www.scipy.org/Cookbook/Matplotlib/Gridding_irregularly_spaced_data > > and tried the suggested technique. For my grid, I made a square of > the min and max of my data. However, it had problems: > > ... >File > "/home/guest/.local/lib/python2.6/site-packages/matplotlib/delaunay/triangulate.py", > line 125, in _compute_convex_hull > hull.append(edges.pop(hull[-1])) > KeyError: 0 > > > Should I expect matplotlib.mlab.griddata to work with a dataset like > this? I know that I can use hexbin, but it'd be really nice to see > contours explicitly. It's not a problem with your points lying inside a triangle. There is some other problem with the construction of the Delaunay triangulation. Sometimes the algorithm fails. This is one way that it fails. -- Robert Kern "I have come to believe that the whole world is an enigma, a harmless enigma that is made terrible by our own mad attempt to interpret it as though it had an underlying truth." -- Umberto Eco -- SOLARIS 10 is the OS for Data Centers - provides features such as DTrace, Predictive Self Healing and Award Winning ZFS. Get Solaris 10 NOW http://p.sf.net/sfu/solaris-dev2dev ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Import bug for numpy >= 2.0
On 2010-02-14 11:23 AM, Charles R Harris wrote:
> Lines 147-151 of __init__ need to be changed to
>
> import numpy
> nn = numpy.__version__.split('.')
> if not (int(nn[0]) > 1 or int(nn[0]) == 1 and int(nn[1]) >= 1):
> raise ImportError(
> 'numpy 1.1 or later is required; you have %s' % numpy.__version__)
It's been noted and fixed in SVN.
--
Robert Kern
"I have come to believe that the whole world is an enigma, a harmless enigma
that is made terrible by our own mad attempt to interpret it as though it had
an underlying truth."
-- Umberto Eco
--
SOLARIS 10 is the OS for Data Centers - provides features such as DTrace,
Predictive Self Healing and Award Winning ZFS. Get Solaris 10 NOW
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Re: [Matplotlib-users] Replying with Thunderbird. Reply All doesn't cut it all the time.
Scott Sinclair wrote: >> 2009/12/7 Wayne Watson : >> I see a variance with replying to a post on this list and other Python >> lists. It appears to be a difference between the way people post. If I >> see From: a...@xyz.net and To: >> matplotlib-users-5nwgofrqmnerv+lv9mx5uipxlwaov...@public.gmane.org, >> then Reply All gets both. If I see, From: joe...@xyz.net and To: my >> e-mail address (or any personal e-address), then Reply All only goes to >> the From e-address, which means I have to fill in the e-address for this >> mail list. Apparently, some people from outside using a mail program >> like Thunderbird. How do I get two for price of one, so to speak? > > The default "Reply To" on this list is set to go to the original > poster. It's a setting in the mailing list software, not anyone's > e-mail client. > > If you post a question and someone responds using "Reply To", then > their response will go directly to you. If they respond using "Reply > To All" (as I have here) then the e-mail is copied to the list address > as well. > > The moral? Always use "Reply To", and hope everyone else remembers to > do so as well :) Did you mean "Reply All"? Some of us would appreciate it if people just responded to the list and not including our individual addresses at all. With very rare exceptions, everyone who posts is already on the list. I subscribe to the list via the GMane NNTP interface and hate receiving private-looking (hence urgent-looking) replies in my inbox. -- Robert Kern "I have come to believe that the whole world is an enigma, a harmless enigma that is made terrible by our own mad attempt to interpret it as though it had an underlying truth." -- Umberto Eco -- Return on Information: Google Enterprise Search pays you back Get the facts. http://p.sf.net/sfu/google-dev2dev ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] matplotlib with Qt4 backend
On 2009-11-12 16:44 PM, Andrew Straw wrote:
> Robert Kern wrote:
>> On 2009-11-12 12:05 PM, Andrew Straw wrote:
>>
>>> Celil Rufat wrote:
>>>
>>>> I just installed matplotlib on Snow Leopard 10.6 with the Qt4 backend
>>>> (via macports). However, when I try one of the Qt4 examles:
>>>>
>>>> python
>>>> /opt/local/share/py26-matplotlib/examples/user_interfaces/embedding_in_qt4.py
>>>>
>>>>
>>>> IOError: [Errno 4] Interrupted system call
>>>>
>>>> Any ideas on what could be causing this?
>>>>
>>> Out of curiosity, does anyone know where the signal interrupting the
>>> system call is originating? Is this a standard communication mechanism
>>> within Qt4? (I have never used Qt4.) I'm interested in knowing about OSS
>>> that use signals as a means of across-thread or across-process
>>> communication.
>>>
>>
>> This problem arises when signal handlers are installed, not necessarily when
>> a
>> signal itself is sent (dtrace doesn't detect any).
> Hmm, but a system call isn't going to get interrupted and return EINTR
> by any means other than a signal. So the OP must have had a signal
> interrupting the call and it must have come from somewhere. Or... am I
> wrong?
Well, SIGCHLD is sent by the OS when the child process completes. There is a
SIGCHLD handler registered in ./src/corelib/io/qprocess_unix.cpp . I'm not sure
how to avoid it, though.
I think I can verify this now:
$ really dtrace -n 'proc:::signal-handle /pid==$target/ { ustack();
printf("Signal: %d\n", arg0);}' -c "python application.py"
dtrace: description 'proc:::signal-handle ' matched 2 probes
Traceback (most recent call last):
File "application.py", line 247, in
commands.getstatusoutput( "otool -L %s | grep libedit" % _rl.__file__ )
File
"/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/commands.py",
line 54, in getstatusoutput
text = pipe.read()
IOError: [Errno 4] Interrupted system call
dtrace: pid 47973 has exited
CPU IDFUNCTION:NAME
1 18577sendsig:signal-handle
libSystem.B.dylib`read+0xa
libSystem.B.dylib`__srefill+0x127
libSystem.B.dylib`fread+0x9f
0x1c2d9b
0x23affa
0x23bde1
0x23c7fa
0x23c907
0x260d37
0x2610e3
0x26f855
python`0x1f82
python`0x1ea9
0x2
Signal: 20
$ python -c "import signal;print signal.SIGCHLD"
20
So it is getting SIGCHLD. I think my previous probes weren't getting signals
from the OS itself.
--
Robert Kern
"I have come to believe that the whole world is an enigma, a harmless enigma
that is made terrible by our own mad attempt to interpret it as though it had
an underlying truth."
-- Umberto Eco
--
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Re: [Matplotlib-users] matplotlib with Qt4 backend
On 2009-11-12 12:05 PM, Andrew Straw wrote: > Celil Rufat wrote: >> I just installed matplotlib on Snow Leopard 10.6 with the Qt4 backend >> (via macports). However, when I try one of the Qt4 examles: >> >> python >> /opt/local/share/py26-matplotlib/examples/user_interfaces/embedding_in_qt4.py >> >> >> IOError: [Errno 4] Interrupted system call >> >> Any ideas on what could be causing this? > Out of curiosity, does anyone know where the signal interrupting the > system call is originating? Is this a standard communication mechanism > within Qt4? (I have never used Qt4.) I'm interested in knowing about OSS > that use signals as a means of across-thread or across-process > communication. This problem arises when signal handlers are installed, not necessarily when a signal itself is sent (dtrace doesn't detect any). PyQt4 doesn't do it, but I think something in QApplication does. I really don't know what, though. Here are the files that call signal(3) or sigaction(3): ./src/3rdparty/freetype/src/tools/ftrandom/ftrandom.c ./src/3rdparty/phonon/qt7/quicktimevideoplayer.mm ./src/3rdparty/sqlite/shell.c ./src/3rdparty/webkit/JavaScriptCore/jsc.cpp ./src/corelib/io/qfilesystemwatcher_dnotify.cpp ./src/corelib/io/qprocess_unix.cpp ./src/corelib/kernel/qcrashhandler.cpp ./src/corelib/kernel/qeventdispatcher_unix.cpp ./src/gui/embedded/qwindowsystem_qws.cpp ./src/gui/embedded/qwssignalhandler.cpp ./tools/qvfb/main.cpp It's not obvious to me that any of these are activated on OS X (the qcrashhandler.cpp file is intriguing, but it only seems to be used in the X11 QApplication). dtrace doesn't actually show either signal(3) or sigaction(3) being called at all. Actually, running a program under dtrace while probing those functions makes the problem go away. Sometimes. -- Robert Kern "I have come to believe that the whole world is an enigma, a harmless enigma that is made terrible by our own mad attempt to interpret it as though it had an underlying truth." -- Umberto Eco -- 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] Circular colormaps
On 2009-11-09 11:46 AM, Chloe Lewis wrote: > ... and for dessert, is there a circular colormap that would work for > the colorblind? Almost certainly not, at least not without compromising other desirable features for circular colormaps. You could do a circle roughly perpendicular to the lines of confusion, but this would mean going up and down in lightness, which perceptually overemphasizes the light half. On the other hand, this may not be a bad thing if 0 degrees and/or 180 degrees are special as might be the case with phase measurements and other complex number-related things. > My department is practicing presenting-science-for-the-general-public, > and the problems 'heat maps' have for the colorblind keep coming up. As a deuteronopic, I heartily thank you for paying attention to these issues. I've written an application to visualize colormaps in 3D perceptual space as well as simulating colorblindness. It uses Mayavi and Chaco, so you will need a full Enthought Tool Suite installation: http://www.enthought.com/~rkern/cgi-bin/hgwebdir.cgi/colormap_explorer/ Of interest for this thread might be the function find_chroma() in hcl_opt.py which will, given a lightness value in HCL space, find the largest chroma value (roughly similar to saturation) such that a circle at the given lightness value will just fit inside of the RGB gamut. A simple maximization on that function will find the lightness that gives the largest chroma and hence the largest dynamic range of such a colormap. However, it should be noted that I have found such colormaps to appear a little washed out and drab. But then, I'm colorblind. -- Robert Kern "I have come to believe that the whole world is an enigma, a harmless enigma that is made terrible by our own mad attempt to interpret it as though it had an underlying truth." -- Umberto Eco -- 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] ImportError: No module named ma
BTW, please do not Cc: me. I am subscribed to the list and read through GMane. It's annoying to get list replies to my email where I don't want them. On 2009-10-12 15:38 PM, John Hunter wrote: > On Mon, Oct 12, 2009 at 3:21 PM, Robert Kern wrote: >> On 2009-10-12 15:16 PM, Chaitanya Krishna wrote: >>> Hi, >>> >>> I solved it by installing matplotlib 0.99. But, on Mac 10.5 when I >>> used easy_install matplotlib, it was still saying that 0.91 was the >>> latest and I couldn't install it. Finally I had to download the egg >>> and manually install it (easy_install --install-dir) >> >> I suspect that that version of easy_install has not been fixed to parse >> Sourceforge's new download pages. > > Shouldn't easy_install be reading the pypi data, which points to the > proper sf page? > > http://pypi.python.org/pypi/matplotlib Yup, but the link URLs are of the form http://sourceforge.net/.../.egg/download which does not obviously mean "this is the URL for .egg" unless if you know to remove the final /download part. -- Robert Kern "I have come to believe that the whole world is an enigma, a harmless enigma that is made terrible by our own mad attempt to interpret it as though it had an underlying truth." -- Umberto Eco -- Come build with us! The BlackBerry(R) 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/devconference ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] ImportError: No module named ma
On 2009-10-12 15:16 PM, Chaitanya Krishna wrote: > Hi, > > I solved it by installing matplotlib 0.99. But, on Mac 10.5 when I > used easy_install matplotlib, it was still saying that 0.91 was the > latest and I couldn't install it. Finally I had to download the egg > and manually install it (easy_install --install-dir) I suspect that that version of easy_install has not been fixed to parse Sourceforge's new download pages. -- Robert Kern "I have come to believe that the whole world is an enigma, a harmless enigma that is made terrible by our own mad attempt to interpret it as though it had an underlying truth." -- Umberto Eco -- Come build with us! The BlackBerry(R) 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/devconference ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] ImportError: No module named ma
On 2009-10-12 12:19 PM, Chaitanya Krishna wrote: > Hi all, > > numpy.__file__ gives 1.3.0 > >>>> import numpy >>>> print numpy.__file__ > /Library/Python/2.5/site-packages/numpy-1.3.0-py2.5-macosx-10.5-i386.egg/numpy/__init__.pyc Ah, right. I'm sorry. numpy.core.ma is not the location of that subpackage anymore. It is now numpy.ma. Upgrade to a more recent matplotlib. -- Robert Kern "I have come to believe that the whole world is an enigma, a harmless enigma that is made terrible by our own mad attempt to interpret it as though it had an underlying truth." -- Umberto Eco -- Come build with us! The BlackBerry(R) 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/devconference ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] ImportError: No module named ma
On 2009-10-12 11:58 AM, Chaitanya Krishna wrote: > Hi all, > > I am on Mac OS 10.5 and numpy 1.3.0 and matplotlib 0.91.1. > > When I run a qtdemo script, it fails with > File > "/Library/Python/2.5/site-packages/matplotlib-0.91.1-py2.5-macosx-10.5-i386.egg/matplotlib/numerix/ma/__init__.py", > line 16, in > from numpy.core.ma import * > ImportError: No module named ma > > Any ideas? I have a mixed up system where I have installed my own > version of Python 2.6 and Apple's version at 2.5. Presently I am using > Apple's version of Python. Apple's version of Python comes with numpy 1.0.1, before numpy.core.ma was introduced. It seems like your installation of numpy 1.3.0 did not override Apple's version. To double-check: >>> import numpy >>> print numpy.__file__ -- Robert Kern "I have come to believe that the whole world is an enigma, a harmless enigma that is made terrible by our own mad attempt to interpret it as though it had an underlying truth." -- Umberto Eco -- Come build with us! The BlackBerry(R) 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/devconference ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Images and memory management
Leo Trottier wrote: > Hi Michael, > > I suppose I'm a bit confused -- I thought that jpeglib, part of which > is implemented by PIL (??) Other way around. PIL uses jpeglib to read JPEG files. > could process compressed images without > representing decompressing them to a dense raster-image matrix > (http://en.wikipedia.org/wiki/Jpeglib). However, PIL does not use make use of such capabilities. It just reads in the data into uncompressed memory just like it does with any other image format. -- Robert Kern "I have come to believe that the whole world is an enigma, a harmless enigma that is made terrible by our own mad attempt to interpret it as though it had an underlying truth." -- Umberto Eco -- Come build with us! The BlackBerry(R) 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/devconference ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] contribution offer: griddata with gaussian average
On 2009-10-05 15:54 PM, VáclavŠmilauer wrote: > I am not sure if that is the same as what scipy.stats.kde.gaussian_kde does, > the documentation is terse. Can I be enlightened here? gaussian_kde does kernel density estimation. While many of the intermediate computations are similar, they have entirely different purposes. http://en.wikipedia.org/wiki/Kernel_density_estimation -- Robert Kern "I have come to believe that the whole world is an enigma, a harmless enigma that is made terrible by our own mad attempt to interpret it as though it had an underlying truth." -- Umberto Eco -- 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] contribution offer: griddata with gaussian average
Ryan May wrote: > On Sun, Oct 4, 2009 at 4:21 PM, Robert Kern wrote: >> On 2009-10-04 15:27 PM, Christopher Barker wrote: >>> Václav Šmilauer wrote: >>> >>>> about a year ago I developed for my own purposes a routine for averaging >>>> irregularly-sampled data using gaussian average. >>> is this similar to Kernel Density estimation? >>> >>> http://www.scipy.org/doc/api_docs/SciPy.stats.kde.gaussian_kde.html >> No. It is probably closer to radial basis function interpolation (in fact, it >> almost certainly is a form of RBFs): >> >> http://docs.scipy.org/doc/scipy/reference/tutorial/interpolate.html#id1 > > Except in radial basis function interpolation, you solve for the > weights that give the original values at the original data points. > Here, it's just a inverse-distance weighted average, where the weights > are chosen using an exp(-x^2/A) relation. There's a huge difference > between the two when you're dealing with data with noise. Fair point. -- Robert Kern "I have come to believe that the whole world is an enigma, a harmless enigma that is made terrible by our own mad attempt to interpret it as though it had an underlying truth." -- Umberto Eco -- 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] contribution offer: griddata with gaussian average
On 2009-10-04 15:27 PM, Christopher Barker wrote: > Václav Šmilauer wrote: > >> about a year ago I developed for my own purposes a routine for averaging >> irregularly-sampled data using gaussian average. > > is this similar to Kernel Density estimation? > > http://www.scipy.org/doc/api_docs/SciPy.stats.kde.gaussian_kde.html No. It is probably closer to radial basis function interpolation (in fact, it almost certainly is a form of RBFs): http://docs.scipy.org/doc/scipy/reference/tutorial/interpolate.html#id1 -- Robert Kern "I have come to believe that the whole world is an enigma, a harmless enigma that is made terrible by our own mad attempt to interpret it as though it had an underlying truth." -- Umberto Eco -- 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] incorrect boxplot?
On 2009-09-14 16:08 PM, Gökhan Sever wrote: > > > On Mon, Sep 14, 2009 at 3:45 PM, <mailto:jason-s...@creativetrax.com>> wrote: > > Robert Kern wrote: > > prctile does not handle the case where the exact percentile lies > between two > > items. scoreatpercentile does. > > > > > > If mlab is supposed to be compatible with matlab, then isn't this a > problem? > > From matlab, version 7.2.0.283 (R2006a) > > >> prctile([1 1 2 2 1 2 4 3 2 2 2 3 4 5 6 7 8 9 7 6 4 5 5],[0 25 50 75 > 100]) > > ans = > > 1.2.4.5.75009. > > > Of course, the 75th percentile is different here too (5.75 instead of > scipy's 5.5). I don't know how to explain that discrepancy. > > Jason > > > Now there are 3 different 75 percentiles :). Any ideas, which is one the > most correct? They are all reasonable. There are lots of different ways of handling this case. From the R documentation: http://sekhon.berkeley.edu/stats/html/quantile.html -- Robert Kern "I have come to believe that the whole world is an enigma, a harmless enigma that is made terrible by our own mad attempt to interpret it as though it had an underlying truth." -- Umberto Eco -- 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] incorrect boxplot?
On 2009-09-14 13:49 PM, Gökhan Sever wrote:
>
>
> On Mon, Sep 14, 2009 at 12:30 PM, <mailto:jason-s...@creativetrax.com>> wrote:
>
> I tried the following (most output text is deleted):
>
> In [1]: ob1=[1,1,2,2,1,2,4,3,2,2,2,3,4,5,6,7,8,9,7,6,4,5,5]
> In [2]: import matplotlib.pyplot as
> plt
> In [3]:
> plt.figure()
> In [4]:
> plt.boxplot(ob1)
> In [5]:
> plt.savefig('test.png')
> In [6]: import
> scipy.stats
> In [7]:
> scipy.stats.scoreatpercentile(ob1,75)
> Out[7]: 5.5
>
>
> Note that the 75th percentile is 5.5. R agrees with this calculation.
> However, in the boxplot, the top of the box is around 6, not 5.5. Isn't
> the top of the box supposed to be at the 75th percentile?
>
> Thanks,
>
> Jason
>
> --
> Jason Grout
>
>
> From matplotlib/lib/matplotlib/axes.py
>
> You can see how matplotlib calculating percentiles. And yes it doesn't
> conform with scipy's scoreatpercentile()
>
>
> # get median and quartiles
> q1, med, q3 = mlab.prctile(d,[25,50,75])
>
> I[36]: q1
> O[36]: 2.0
>
> I[37]: med
> O[37]: 4.0
>
> I[38]: q3
> O[38]: 6.0
>
>
> Could this be due to a rounding? I don't know, but I am curious to hear
> the explanations for this discrepancy.
prctile does not handle the case where the exact percentile lies between two
items. scoreatpercentile does.
--
Robert Kern
"I have come to believe that the whole world is an enigma, a harmless enigma
that is made terrible by our own mad attempt to interpret it as though it had
an underlying truth."
-- Umberto Eco
--
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Re: [Matplotlib-users] ipython --pylab without namespace pollution?
On 2009-07-22 18:09, Christopher Barker wrote: > Hi folks, > > Does anyone know if there is a way to use ipython with the advantages of > the -pylab option (separate gui thread, etc.), but without the whole > pylab namespace getting sucked in? > > I love ipython pylab mode, but like to use namespaces to keep things clean. ipython -wthread -- Robert Kern "I have come to believe that the whole world is an enigma, a harmless enigma that is made terrible by our own mad attempt to interpret it as though it had an underlying truth." -- Umberto Eco -- ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] invisible plot
On 2009-07-15 16:58, Dr. Phillip M. Feldman wrote: > I'm a newbie to matplotlib. When I try to generate a simple plot, nothing > happens. Any advice will be appreciated. Here's my code: > > from numpy import * > from matplotlib import * > > x= arange(0,10.,0.1) > y= x**1.5 - 0.25*x**2 > > pyplot.figure(figsize=(9, 6), dpi=120) > pyplot.plot(x, y) pyplot.show() -- Robert Kern "I have come to believe that the whole world is an enigma, a harmless enigma that is made terrible by our own mad attempt to interpret it as though it had an underlying truth." -- Umberto Eco -- Enter the BlackBerry Developer Challenge This is your chance to win up to $100,000 in prizes! For a limited time, vendors submitting new applications to BlackBerry App World(TM) will have the opportunity to enter the BlackBerry Developer Challenge. See full prize details at: http://p.sf.net/sfu/Challenge ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] speeding-up griddata()
On 2009-07-14 12:52, Robert Cimrman wrote: > Robert Kern wrote: >> On 2009-07-13 13:20, Robert Cimrman wrote: >>> Hi all, >>> >>> I would like to use griddata() to interpolate a function given at >>> specified points of a bunch of other points. While the method works >>> well, it slows down considerably as the number of points to interpolate >>> to increases. >>> >>> The dependence of time/(number of points) is nonlinear (see the >>> attachment) - it seems that while the Delaunay trinagulation itself is >>> fast, I wonder how to speed-up the interpolation. The docstring says, >>> that it is based on "natural neighbor interpolation" - how are the >>> neighbors searched? >> Using the Delaunay triangulation. The "natural neighbors" of an interpolation >> point are those points participating in triangles in the Delaunay >> triangulation >> whose circumcircles include the interpolation point. The triangle that >> encloses >> the interpolation point is found by a standard walking procedure, then the >> neighboring triangles (natural or otherwise) are explored in a breadth-first >> search around the starting triangle to find the natural neighbors. > > I see, thanks for the explanation. The walking procedure is what is > described e.g. in [1], right? (summary; starting from a random triangle, > a line is made connecting that triangle with the interpolation point, > and triangles along that line are probed.) > > [1] http://www.geom.uiuc.edu/software/cglist/GeomDir/ptloc96.ps.gz Yes. >>> Does it use the kd-trees like scipy.spatial? I have >>> a very good experience with scipy.spatial performance. >>> >>> Also, is there a way of reusing the triangulation when interpolating >>> several times using the same grid? >> One would construct a Triangulation() object with the (x,y) data points, get >> a >> new NNInterpolator() object using the .nn_interpolator(z) method for each >> new z >> data set, and then interpolate your grid on the NNInterpolator. > > So if the above fails, I can bypass griddata() by using the delaunay > module directly, good. Yes. griddata is a fairly light wrapper that exists mainly to sanitize inputs and allow use of the natgrid implementation easily. -- Robert Kern "I have come to believe that the whole world is an enigma, a harmless enigma that is made terrible by our own mad attempt to interpret it as though it had an underlying truth." -- Umberto Eco -- Enter the BlackBerry Developer Challenge This is your chance to win up to $100,000 in prizes! For a limited time, vendors submitting new applications to BlackBerry App World(TM) will have the opportunity to enter the BlackBerry Developer Challenge. See full prize details at: http://p.sf.net/sfu/Challenge ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] speeding-up griddata()
On 2009-07-13 13:20, Robert Cimrman wrote: > Hi all, > > I would like to use griddata() to interpolate a function given at > specified points of a bunch of other points. While the method works > well, it slows down considerably as the number of points to interpolate > to increases. > > The dependence of time/(number of points) is nonlinear (see the > attachment) - it seems that while the Delaunay trinagulation itself is > fast, I wonder how to speed-up the interpolation. The docstring says, > that it is based on "natural neighbor interpolation" - how are the > neighbors searched? Using the Delaunay triangulation. The "natural neighbors" of an interpolation point are those points participating in triangles in the Delaunay triangulation whose circumcircles include the interpolation point. The triangle that encloses the interpolation point is found by a standard walking procedure, then the neighboring triangles (natural or otherwise) are explored in a breadth-first search around the starting triangle to find the natural neighbors. Unfortunately, griddata() uses the unstructured-interpolation-points API rather than the more efficient grid-interpolation-points API. In the former, each interpolation point uses the last-found enclosing triangle as the start of the walking search. This works well where adjacent interpolation points are close to each other. This is not the case at the ends of the grid rows. The latter API is smarter and starts a new row of the grid with the triangle from the triangle from the *start* of the previous row rather than the end. I suspect this is largely the cause of the poor performance. > Does it use the kd-trees like scipy.spatial? I have > a very good experience with scipy.spatial performance. > > Also, is there a way of reusing the triangulation when interpolating > several times using the same grid? One would construct a Triangulation() object with the (x,y) data points, get a new NNInterpolator() object using the .nn_interpolator(z) method for each new z data set, and then interpolate your grid on the NNInterpolator. -- Robert Kern "I have come to believe that the whole world is an enigma, a harmless enigma that is made terrible by our own mad attempt to interpret it as though it had an underlying truth." -- Umberto Eco -- Enter the BlackBerry Developer Challenge This is your chance to win up to $100,000 in prizes! For a limited time, vendors submitting new applications to BlackBerry App World(TM) will have the opportunity to enter the BlackBerry Developer Challenge. See full prize details at: http://p.sf.net/sfu/Challenge ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] plot a triangular mesh
On 2009-05-23 21:35, Eric Carlson wrote: > Hello Robert, > I studied delaunay and mlab.griddata a bit while converting tinterp and > saw the > > """ > tri = delaunay.Triangulation(x,y) > # interpolate data > interp = tri.nn_interpolator(z) > zo = interp(xi,yi) > """ > stuff. In studying delaunay, however, it was/is not clear to me how to > set up the "triangulation" for > > delaunay.LinearInterpolator(triangulation, z, default_value=-1.#IND) > > without going through delaunay. Any chance you could give an example of > using delaunay to linearly interpolate on mesh x,y assuming data_pts, > triangles, f_at_data_points are already given? Hmm, true. I violated my own principle of trying not to do too much in the constructor. However, you should be able to figure out how to use the underlying utility functions compute_planes() and linear_interpolate_grid() from the LinearInterpolator code and Triangulation's docstring to describe its attributes. -- Robert Kern "I have come to believe that the whole world is an enigma, a harmless enigma that is made terrible by our own mad attempt to interpret it as though it had an underlying truth." -- Umberto Eco -- Register Now for Creativity and Technology (CaT), June 3rd, NYC. CaT is a gathering of tech-side developers & brand creativity professionals. Meet the minds behind Google Creative Lab, Visual Complexity, Processing, & iPhoneDevCamp asthey present alongside digital heavyweights like Barbarian Group, R/GA, & Big Spaceship. http://www.creativitycat.com ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] plot a triangular mesh
On 2009-05-23 17:17, Eric Carlson wrote: > I should read entire posts before sending people down the wrong > pathways. I just happened to be working on a Python equivalent to MATLAB > "triplot" stuff when I read your subject line and made the wrong > assumptions. That program does just plot the edges, as you noted. > > I have attached a python program, much of which is a translation of a > program I found at M*B central, contributed from the outside. Given a > triangulation, it allows you to interpolate on a regular rectangular > grid (dx=constant, dy=another constant). In your case, it should allow > you to use your original triangulation, and should avoid the convex hull > artifacts of your original griddata plot. I do not know if this new > program will give you a figure that will look as good as your latest > based on John's suggestion or not. delaunay has a linear interpolator implemented in C++ that could be used for this purpose, too. The natural neighbor interpolator is only for Delaunay triangulations, but the linear interpolator should be usable for general triangulations. -- Robert Kern "I have come to believe that the whole world is an enigma, a harmless enigma that is made terrible by our own mad attempt to interpret it as though it had an underlying truth." -- Umberto Eco -- Register Now for Creativity and Technology (CaT), June 3rd, NYC. CaT is a gathering of tech-side developers & brand creativity professionals. Meet the minds behind Google Creative Lab, Visual Complexity, Processing, & iPhoneDevCamp asthey present alongside digital heavyweights like Barbarian Group, R/GA, & Big Spaceship. http://www.creativitycat.com ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Problem Using/Installing the matplotlib
On 2009-02-10 16:50, Gustavo Blando wrote: > Awesome Robert, thanks. > Here is the Python path. > > C:\Python25\Lib\site-packages\numpy;C:\Python25\Lib\site-packages\matplotlib;C:\Python25\Lib\site-packages\scipy;C:\Python25\Lib\site-packages\pyreadline;C:\Python25\Lib\site-packages;C:\StatEye\v5_2;C:\Python25\Lib\site-packages\numpy;C:\Python25\Lib\site-packages\matplotlib;C:\Python25\Lib\site-packages\scipy;C:\Python25\Lib\site-packages\pyreadline;C:\Python25\Lib\site-packages\numpy;C:\Python25\Lib\site-packages\matplotlib;C:\Python25\Lib\site-packages\scipy;C:\Python25\Lib\site-packages\pyreadline;C:\Python25\Lib\site-packages Okay, none of that is necessary except for C:\StatEye\v5_2 . site-packages will already be on your sys.path, so putting it on the PYTHONPATH is unnecessary. The package directories like numpy and matplotlib definitely should *not* be on your PYTHONPATH or sys.path. It is the directory that *contains* your packages that needs to be on the sys.path; but as I already noted, site-packages is built in, so you don't need to add it yourself. -- Robert Kern "I have come to believe that the whole world is an enigma, a harmless enigma that is made terrible by our own mad attempt to interpret it as though it had an underlying truth." -- Umberto Eco -- Create and Deploy Rich Internet Apps outside the browser with Adobe(R)AIR(TM) software. With Adobe AIR, Ajax developers can use existing skills and code to build responsive, highly engaging applications that combine the power of local resources and data with the reach of the web. Download the Adobe AIR SDK and Ajax docs to start building applications today-http://p.sf.net/sfu/adobe-com ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Problem Using/Installing the matplotlib
On 2009-02-10 15:26, Gustavo Blando wrote: > Hi, I am new to Python, and I am trying to install the matplotlib but it is >> not working. >> I would appreciate your help. > I am using Python with the PythonWin environment. > I have created a PYTHONPATH on my environment variables to make > sure I point to all the libraries. > I have installed the numpy, scipy and other libraries that seems > to work just fine. > > BUT when I try to load the matplotlib, this is what I get: > >> ERROR: >> == >> from matplotlib import * >> Traceback (most recent call last): >> File "", line 1, in >> File "C:\Python25\Lib\site-packages\matplotlib\__init__.py", line 97, in >> >>import distutils.sysconfig >> File "C:\Python25\Lib\site-packages\numpy\distutils\__init__.py", line 6, >> in >>import ccompiler >> File "C:\Python25\Lib\site-packages\numpy\distutils\ccompiler.py", line 7, >> in >>from distutils import ccompiler >> ImportError: cannot import name ccompiler > >> - It's having a problem with ccompiler, but ccompiler.py is on that >> directory. It looks like you have a problem with your PYTHONPATH. You shouldn't have c:\Python25\Lib\site-packages\numpy\ on your PYTHONPATH. Show me your PYTHONPATH, and I can point out what else is wrong. -- Robert Kern "I have come to believe that the whole world is an enigma, a harmless enigma that is made terrible by our own mad attempt to interpret it as though it had an underlying truth." -- Umberto Eco -- Create and Deploy Rich Internet Apps outside the browser with Adobe(R)AIR(TM) software. With Adobe AIR, Ajax developers can use existing skills and code to build responsive, highly engaging applications that combine the power of local resources and data with the reach of the web. Download the Adobe AIR SDK and Ajax docs to start building applications today-http://p.sf.net/sfu/adobe-com ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] matplotlib egg finds wrong version of numpy
Jeff Mangum wrote: > Hmmm. Got it from python.org (http://python.org/download/releases/2.5.2/) > and just reinstalled to make sure. Indeed the binary is in > /Library/Frameworks/Python.framework/Versions/Current/bin/python. I know that you have the python.org Python installed. However, it may not be the Python that the easy_install script is using. Check the contents of the easy_install file. It ought to point to /Library/Frameworks/.../Python at the top. Try explicitly running /Library/Frameworks/.../bin/easy_install instead. > I am seeing some other problems (like PPC binaries in /opt/local/bin). I > have recently migrated from PPC to Intel Mac, and I suspect that the > migration assistant may have been too thorough... Your PYTHONPATH may also be messed up. -- Robert Kern "I have come to believe that the whole world is an enigma, a harmless enigma that is made terrible by our own mad attempt to interpret it as though it had an underlying truth." -- Umberto Eco - 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] matplotlib egg finds wrong version of numpy
Jeff Mangum wrote: > Thanks Robert. I grabbed setuptools and reinstalled. Unfortunately, even > though I am using the right version of easy_install... > > torgo:Desktop jmangum$ which easy_install > /Library/Frameworks/Python.framework/Versions/Current/bin/easy_install > > ...I still get the same error when installing matplotlib... > > > BUILDING MATPLOTLIB > matplotlib: 0.98.3 > python: 2.5.1 (r251:54863, Apr 15 2008, 22:57:26) [GCC > 4.0.1 (Apple Inc. build 5465)] This is Apple's Python, not python.org Python. $ /usr/bin/python Python 2.5.1 (r251:54863, Apr 15 2008, 22:57:26) [GCC 4.0.1 (Apple Inc. build 5465)] on darwin Type "help", "copyright", "credits" or "license" for more information. $ /Library/Frameworks/Python.framework/Versions/Current/bin/python Python 2.5.1 (r251:54869, Apr 18 2007, 22:08:04) [GCC 4.0.1 (Apple Computer, Inc. build 5367)] on darwin Type "help", "copyright", "credits" or "license" for more information. -- Robert Kern "I have come to believe that the whole world is an enigma, a harmless enigma that is made terrible by our own mad attempt to interpret it as though it had an underlying truth." -- Umberto Eco - 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] matplotlib egg finds wrong version of numpy
Jeff Mangum wrote: > How can I instruct the matplotlib install to find the appropriate python > install? Thanks! Your easy_install script is the one that comes from OS X's Python. Install setuptools for your www.python.org Python and use the easy_install script that it installs, instead. The Python executable that gets run by the easy_install script is the one which the eggs get installed for. http://pypi.python.org/pypi/setuptools -- Robert Kern "I have come to believe that the whole world is an enigma, a harmless enigma that is made terrible by our own mad attempt to interpret it as though it had an underlying truth." -- Umberto Eco - 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] matplotlib egg finds wrong version of numpy
Jeff Mangum wrote: > Hello, > > I am having a problem installing matplotlib 0.93.3 from egg on Mac OSX > 10.5.5. Even though I have numpy 1.2.1 installed in > /Library/Frameworks/..., the egg insists on using an older version of > numpy (1.0.4) in /opt/local/lib/python2.5/site-packages (which must have > been delivered with the OS). No, /opt/local is MacPorts territory. > How can I tell the egg where to find the > proper version of numpy? Thanks! Are you sure you are using the same versions of Python to run and install both of these? -- Robert Kern "I have come to believe that the whole world is an enigma, a harmless enigma that is made terrible by our own mad attempt to interpret it as though it had an underlying truth." -- Umberto Eco - 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] scipy, matplotlib import errors
John [H2O] wrote: > I wonder if I've misunderstood or made a mistake? I renamed a file: > /usr/lib/python2.5/new.py to /usr/lib/python2.5/new.bak > > and everything worked... but now, after logging out and logging back in > again, I'm getting the problem again? > > Perhaps that was the standard libraries module? But I cannot find any other > new.py files? /usr/lib/python2.5/new.py is the standard library's module. Leave it alone. If you are still having problems and cannot find another new.py module anywhere, edit pkg_resources.py to print out new.__file__ just before where the exception occurs. -- Robert Kern "I have come to believe that the whole world is an enigma, a harmless enigma that is made terrible by our own mad attempt to interpret it as though it had an underlying truth." -- Umberto Eco - 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] Kriging with Matplotlib
Leif Oppermann wrote: > Can someone tell me how to do kriging in Matplotlib? > > I have tried the contourf() function with two bivariate_normal() objects > as input which produces similar looking results to what I want to > archive. My data however is geo-referenced and contains > 10 > samples. Generating 10 objects doesn't sound like a good idea to me. > I searched the docs before posting, but the term "kriging" doesn't even > show in the docs. > > Maybe I missed something obvious? Any hint appreciated. There is no kriging implementation in matplotlib. Kriging is a special case of Gaussian processes, though, so the RandomRealizations package or my own gp package might be of use to you. You will have to do some reading to translate the entities you are familiar with (variograms, etc.) to the entities used in Gaussian processes (covariance functions, etc.). http://code.google.com/p/random-realizations/ http://www.enthought.com/~rkern/cgi-bin/hgwebdir.cgi/gp/ Anand has been doing more work on RandomRealizations than I have on gp, so try it first. -- Robert Kern "I have come to believe that the whole world is an enigma, a harmless enigma that is made terrible by our own mad attempt to interpret it as though it had an underlying truth." -- Umberto Eco - 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] Prism colormap
Rich Fought wrote: > The prism colormap repeats the same pattern over and over instead of > spreading itself over the plotted data range in a pcolor plot. Is this > expected behavior? Yup. prism and flag are designed to repeat. -- Robert Kern "I have come to believe that the whole world is an enigma, a harmless enigma that is made terrible by our own mad attempt to interpret it as though it had an underlying truth." -- Umberto Eco - This SF.net email is sponsored by the 2008 JavaOne(SM) Conference Register now and save $200. Hurry, offer ends at 11:59 p.m., Monday, April 7! Use priority code J8TLD2. http://ad.doubleclick.net/clk;198757673;13503038;p?http://java.sun.com/javaone ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] scipy, matplotlib import errors
John wrote:
> Hello, could someone please help me understand a strange problem,
> possibly associated with PYTHONPATH. When I import matplotlib, pylab, or
> scipy from any directory other than the root installation directory, it
> fails. However, if I'm in the python installation directory there are no
> errors. Thanks in advance! Please see below:
>
> [EMAIL PROTECTED] ~]$ python*
> Python 2.5.1 (r251:54863, Mar 7 2008, 04:10:12)
> [GCC 4.1.3 20070929 (prerelease) (Ubuntu 4.1.2-16ubuntu2)] on linux2
> Type "help", "copyright", "credits" or "license" for more information.
> >>> import scipy
> Traceback (most recent call last):
> File "", line 1, in
> File "/usr/lib/python2.5/site-packages/scipy/__init__.py", line 18, in
>
> import pkg_resources as _pr # activate namespace packages
> (manipulates __path__)
> File "/usr/lib/python2.5/site-packages/pkg_resources.py", line 2581,
> in
> add_activation_listener(lambda dist: dist.activate())
> File "/usr/lib/python2.5/site-packages/pkg_resources.py", line 640, in
> subscribe
> callback(dist)
> File "/usr/lib/python2.5/site-packages/pkg_resources.py", line 2581,
> in
> add_activation_listener(lambda dist: dist.activate())
> File "/usr/lib/python2.5/site-packages/pkg_resources.py", line 2130,
> in activate
> map(declare_namespace, self._get_metadata('namespace_packages.txt'))
> File "/usr/lib/python2.5/site-packages/pkg_resources.py", line 1749,
> in declare_namespace
> _handle_ns(packageName, path_item)
> File "/usr/lib/python2.5/site-packages/pkg_resources.py", line 1712,
> in _handle_ns
> module = sys.modules[packageName] = new.module(packageName)
> AttributeError: 'module' object has no attribute 'module'
You have a new.py module somewhere which is interfering with the standard
library's "new" module. Find it and rename it.
--
Robert Kern
"I have come to believe that the whole world is an enigma, a harmless enigma
that is made terrible by our own mad attempt to interpret it as though it had
an underlying truth."
-- Umberto Eco
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Re: [Matplotlib-users] Bogus colour gradients in imshow()
Christian Lerrahn wrote: > Hi, > I'm plotting some 2D grid data using imshow(). However, one of my test > problems involves a Gaussian peak in the center of my grid. For some > strange reason this Gaussian looks like 5 distinct peaks. It looks like > the values are only set at the centers of my grid cells and then the > colour gradients are interpolate from this central point and a > background. > You can have a look at the original plot and a magnified one at > > http://www.maths.monash.edu.au/~clerrahn/gaussian1.png > http://www.maths.monash.edu.au/~clerrahn/gaussian2.png The problem is that the colors are being set at the points by looking them up in the colormap, and the intermediate colors are being interpolated between those looked-up colors (this may be the point you are trying to make, but I couldn't be sure). The peak color is correct; it only looks like it is lower than the four surrounding points because that colormap is not a very good one for this kind of data. Use a single-hue colormap, instead. The alternative is to interpolate the *values* at the intermediate pixels first, and then look up the colors for each pixel in the colormap. This would give more reasonable results even with misapplied colormaps. However, it will probably be less efficient to implement. -- Robert Kern "I have come to believe that the whole world is an enigma, a harmless enigma that is made terrible by our own mad attempt to interpret it as though it had an underlying truth." -- Umberto Eco - 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] Basemap - ImportError: libgeos_c.so.1
Jeff Whitaker wrote: > Dave: Perhaps you need to add /usr/local to LD_LIBRARY_PATH? It would be /usr/local/lib, not /usr/local -- Robert Kern "I have come to believe that the whole world is an enigma, a harmless enigma that is made terrible by our own mad attempt to interpret it as though it had an underlying truth." -- Umberto Eco - SF.Net email is sponsored by: 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] Automatic Marker Generation
David D Clark wrote: > Hi Folks, > > I have an array A=f(x) with a family of curves. Is there an easy way to > get a different marker for each line of plot(x,A). Use itertools.cycle() to make an iterator that goes round-and-round. Use itertools.izip() to match it up with your data, and perhaps a set of colors, too. import itertools def marker_cycle(): """ Return an infinite, cycling iterator over the available marker symbols. This is wrapped in a function to make sure that you get a new iterator that starts at the beginning every time you request one. """ return itertools.cycle([ 'o','^','v','<','>', 's','+','x','D','d', '1','2','3','4','h', 'H','p','|','_']) for kk, m in itertools.izip(range(A.shape[0]), marker_cycle()): loglog(f, A[kk], linestyle='-', marker=m, lw=2) -- Robert Kern "I have come to believe that the whole world is an enigma, a harmless enigma that is made terrible by our own mad attempt to interpret it as though it had an underlying truth." -- Umberto Eco - This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now >> http://get.splunk.com/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] plot cdf
Alan Isaac wrote: > Is there a standard function or practice for > plotting the CDF of a series? (I am aware > of the output of hist.) import numpy as np from matplotlib import pylab x = ... # whatever n = len(x) x2 = np.repeat(x, 2) y2 = np.hstack([0.0, np.repeat(np.arange(1,n) / float(n), 2), 1.0]) pylab.plot(x2, y2) -- Robert Kern "I have come to believe that the whole world is an enigma, a harmless enigma that is made terrible by our own mad attempt to interpret it as though it had an underlying truth." -- Umberto Eco - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2005. 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] All-in-one distribution of python/numpy/scipy/mpl for windows
Christopher Barker wrote: > Robert Kern wrote: >> Mark Bakker wrote: >>> I think it would be very useful to have one installer that gets a >>> reasonable distrubtion installed (like the old Enthought installer). >>> Isn't something like that in the works for the Mac? >> Not anymore it isn't. We are in the process of building eggs for the Mac, >> though. > > What's the plan with: > > - PPC vs. Intel -- has someone figured out how to make Universal > binaries from Fortran? I think we're just going to build on Intel. Most things will be Universal, but scipy won't. > - wxPython versioning -- though if you go with 2.8+ you should be able > to keep that easy. If you need some wxPython/MPL testing -- let me know, > and I'll try to help. We're looking at moving our stuff to wx 2.8 in the near term, so probably that. -- Robert Kern "I have come to believe that the whole world is an enigma, a harmless enigma that is made terrible by our own mad attempt to interpret it as though it had an underlying truth." -- Umberto Eco - This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] All-in-one distribution of python/numpy/scipy/mpl for windows
Mark Bakker wrote: > I think it would be very useful to have one installer that gets a > reasonable distrubtion installed (like the old Enthought installer). > Isn't something like that in the works for the Mac? Not anymore it isn't. We are in the process of building eggs for the Mac, though. -- Robert Kern "I have come to believe that the whole world is an enigma, a harmless enigma that is made terrible by our own mad attempt to interpret it as though it had an underlying truth." -- Umberto Eco - This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] use of enthought Python for matplotlib/numpy
Giorgio Luciano wrote: > I would add one box of donuts, since I'm trying to make my own > distribution with numpy/scipy/matplotlib but with no success. > and the problem is the same is for a classroom ;) If anyone knows also a > portable distribution with this package I will add extra donuts ;) While we at Enthought are not updating the all-in-one installer anymore, we are distributing up-to-date binaries as eggs. http://code.enthought.com/enstaller/ -- Robert Kern "I have come to believe that the whole world is an enigma, a harmless enigma that is made terrible by our own mad attempt to interpret it as though it had an underlying truth." -- Umberto Eco - This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] freetypelib problem scipy superpack matplotlib
Robert Kern wrote: > Christopher Barker wrote: >> Samuel M. Smith wrote: >>> I did not have this problem with the matplotlib on >>> http://pythonmac.org/packages/py25-fat/dmg/matplotlib-0.90.0-py2.5-macosx10.4-2007-02-20.dmg >> That one was probably built with a statically linked freetype, as the >> one Apple provides doesn't work with MPL. > > No, it was built against a dynamic freetype library which was not included > with > the package. If it had been statically linked, there wouldn't be a problem. My deepest apologies. I misread your post as referring to the Scipy Superpack package. You are correct. -- Robert Kern "I have come to believe that the whole world is an enigma, a harmless enigma that is made terrible by our own mad attempt to interpret it as though it had an underlying truth." -- Umberto Eco - This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] freetypelib problem scipy superpack matplotlib
Samuel M. Smith wrote: > So the conclusion is pythonmac matplotlib uses a statically linked > freetype so it doesn't look into /usr/local/lib > and Fonnesbeck's scipy superpack matplotlib is using a dynamically > linked freetype which is looking into /usr/local/lib Yes. -- Robert Kern "I have come to believe that the whole world is an enigma, a harmless enigma that is made terrible by our own mad attempt to interpret it as though it had an underlying truth." -- Umberto Eco - This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] freetypelib problem scipy superpack matplotlib
Christopher Barker wrote: > Samuel M. Smith wrote: >> I did not have this problem with the matplotlib on >> http://pythonmac.org/packages/py25-fat/dmg/matplotlib-0.90.0-py2.5-macosx10.4-2007-02-20.dmg > > That one was probably built with a statically linked freetype, as the > one Apple provides doesn't work with MPL. No, it was built against a dynamic freetype library which was not included with the package. If it had been statically linked, there wouldn't be a problem. -- Robert Kern "I have come to believe that the whole world is an enigma, a harmless enigma that is made terrible by our own mad attempt to interpret it as though it had an underlying truth." -- Umberto Eco - This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] problems building/installing
Tim Hirzel wrote: > Its a little tough right now that os x doesn't have one python > install to rule them all. Yes it does. http://www.python.org/download/ -- Robert Kern "I have come to believe that the whole world is an enigma, a harmless enigma that is made terrible by our own mad attempt to interpret it as though it had an underlying truth." -- Umberto Eco - Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys-and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] matplotlib and py2exe
Archana Ganesan wrote: > Hi all, > > The exception I get is > Traceback (most recent call last): > File "App1.py", line 6, in ? > File "Frame1.pyc", line 9, in ? > File "Simulation.pyc", line 16, in ? > File "pylab.pyc", line 1, in ? > File "matplotlib\pylab.pyc", line 199, in ? > File "matplotlib\cm.pyc", line 5, in ? > File "matplotlib\colors.pyc", line 33, in ? > File "matplotlib\numerix\__init__.pyc", line 147, in ? > ImportError: No module named random_array Did you follow these instructions? http://www.py2exe.org/index.cgi/MatPlotLib -- Robert Kern "I have come to believe that the whole world is an enigma, a harmless enigma that is made terrible by our own mad attempt to interpret it as though it had an underlying truth." -- Umberto Eco - Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys-and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Possible to use SciPy instead of NumPy?
Tyler Hayes wrote: > Ideally I'd like to just make the one call: > > from pylab import * > > Which would load SciPy (& NumPy) automatically I recommend simply making your own file with all of the imports you need. Implicitly relying on scipy being the chosen 'numerix' will make your code difficult to understand. -- Robert Kern "I have come to believe that the whole world is an enigma, a harmless enigma that is made terrible by our own mad attempt to interpret it as though it had an underlying truth." -- Umberto Eco - Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys-and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] backends issue
Chiara Caronna wrote: > I have a problem with backend: by default it was Agg; i tried to change the > file .matplotlibrc and to put GTKAgg, but as I import pylab I got these > errors: > File > "/usr/local/lib/python2.4/site-packages/matplotlib/backends/backend_gtk.py", > line 6, in ? > import gobject > ImportError: No module named gobject > > What can I do? Install PyGTK. -- Robert Kern "I have come to believe that the whole world is an enigma, a harmless enigma that is made terrible by our own mad attempt to interpret it as though it had an underlying truth." -- Umberto Eco - Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys-and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Newbie trying to get matplotlib up and running on Mac mini.....
Christopher Barker wrote: > Jonathan Kane wrote: >> The file I downloaded was ScipySuperpack-Intel-10.4-py2.4 >> matplotlib was a part of that package. > > Who built/maintains that package? Chris Fonnesbeck. http://trichech.us/?page_id=4 > Anyone know what back-ends it supports? I only see _ns_backend_agg.so and _tkagg.so so I imagine it only support TkAgg for the GUI (and possibly whatever backends that don't require extension modules). -- Robert Kern "I have come to believe that the whole world is an enigma, a harmless enigma that is made terrible by our own mad attempt to interpret it as though it had an underlying truth." -- Umberto Eco - Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier. Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Newbie trying to get matplotlib up and running on Mac mini.....
Jonathan Kane wrote: > Hi, >I have a Mac mini with Intel Duo processors. I downloaded and > installed python, numpy, and scipy on my machine. I downloaded already > built binaries from the website http://www.scipy.org/Download > > The file I downloaded was ScipySuperpack-Intel-10.4-py2.4 > matplotlib was a part of that package. > > This is what I get when I launch python, numpy, scipy, and matplotlib. > > adsl-69-154-179-12:~ seismic73$ python > ActivePython 2.4.3 Build 11 (ActiveState Software Inc.) based on > Python 2.4.3 (#1, Apr 3 2006, 18:07:14) > [GCC 4.0.1 (Apple Computer, Inc. build 5247)] on darwin > Type "help", "copyright", "credits" or "license" for more information. >>>> >>>> from numpy import * >>>> from scipy import * >>>> from pylab import * > Traceback (most recent call last): > File "", line 1, in ? > File > "/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/site-packages/pylab.py", > line 1, in ? > from matplotlib.pylab import * > ImportError: No module named matplotlib.pylab Hrmm. Unfortunately, the matplotlib package in (at least) the Intel version is still missing matplotlib/__init__.py. You can download the file from here: http://matplotlib.svn.sourceforge.net/viewvc/*checkout*/matplotlib/trunk/matplotlib/lib/matplotlib/__init__.py?revision=2835 Put it in /Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/site-packages/matplotlib/ -- Robert Kern "I have come to believe that the whole world is an enigma, a harmless enigma that is made terrible by our own mad attempt to interpret it as though it had an underlying truth." -- Umberto Eco - Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier. Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] installing numpy, matplotlib, scipy from source on a Mac
Christopher Barker wrote: > The MPL build system uses a nifty utility that comes with wx called > wx-config to find the wx libs. However, Apple delivered an old version > of wxPython with it's Python2.3. By default, the MPL build find the old > wx-config, and you end up building the wxAgg back-end against that > version of wx, which is not the one you want. Try this: Yes, thank you for figuring that out! That's the part that I forgot about. -- Robert Kern "I have come to believe that the whole world is an enigma, a harmless enigma that is made terrible by our own mad attempt to interpret it as though it had an underlying truth." -- Umberto Eco - Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys - and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] installing numpy, matplotlib, scipy from source on a Mac
belinda thom wrote: > Hi, > > On Jan 10, 2007, at 5:56 PM, Robert Kern wrote: > >> belinda thom wrote: >>> I went back and retried the plotting w/wx >>> as a backend and discovered that wx FAILS with PYTHONW and PYTHON >>> (appended). >> Okay, what version of wxPython did you install? What version of >> wxPython is >> actually imported (check wx.__version__)? > > Python 2.4.4 (#1, Oct 18 2006, 10:34:39) > [GCC 4.0.1 (Apple Computer, Inc. build 5341)] on darwin > Type "help", "copyright", "credits" or "license" for more information. > history mechanism set up > >>> import wx > >>> wx.__version__ > '2.6.3.3' Okay, let me rephrase: which binary package of wxPython did you install? -- Robert Kern "I have come to believe that the whole world is an enigma, a harmless enigma that is made terrible by our own mad attempt to interpret it as though it had an underlying truth." -- Umberto Eco - Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys - and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] installing numpy, matplotlib, scipy from source on a Mac
belinda thom wrote: > I went back and retried the plotting w/wx > as a backend and discovered that wx FAILS with PYTHONW and PYTHON > (appended). Okay, what version of wxPython did you install? What version of wxPython is actually imported (check wx.__version__)? (And we can leave off numpy-discussion, it's not relevant there). -- Robert Kern "I have come to believe that the whole world is an enigma, a harmless enigma that is made terrible by our own mad attempt to interpret it as though it had an underlying truth." -- Umberto Eco - Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys - and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] installing numpy, matplotlib, scipy from source on a Mac
belinda thom wrote: > Robert, > >> Try running with pythonw. > > Do you know how to fix this in IDLE (it must be using python as > opposed to pythonw somehow). I'm afraid that I don't know enough about IDLE to help you. -- Robert Kern "I have come to believe that the whole world is an enigma, a harmless enigma that is made terrible by our own mad attempt to interpret it as though it had an underlying truth." -- Umberto Eco - Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys - and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] installing numpy, matplotlib, scipy from source on a Mac
John Hunter wrote: >>>>>> "Robert" == Robert Kern <[EMAIL PROTECTED]> writes: > > Robert> Personally, I think the warnings are a bit overzealous and > Robert> should be silenced. It's not as if the user is explicitly > Robert> telling the font manager to load those specific > Robert> fonts. They are automatically and unavoidably attempted. > > I just modified the font manager to move this reporting into the > verbose handler, so now they will only show up with verbose "helpful" > or greater. And there was much rejoicing! -- Robert Kern "I have come to believe that the whole world is an enigma, a harmless enigma that is made terrible by our own mad attempt to interpret it as though it had an underlying truth." -- Umberto Eco - Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys - and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] installing numpy, matplotlib, scipy from source on a Mac
belinda thom wrote: > I am posting this message to both numpy and matplotlib mailing lists > because the thread relates to both. Actually, it's really only relevant to matplotlib. > However, after installing wx and matplotlib, various problems result: > > 1) warnings about fonts > 2) wx fails to work > > I've appended the warnings below. These only occur the first time > pylab is imported (does this make sense?). Yes. After the first time, a cache is built and the font manager doesn't go trawling through your fonts again. matplotlib's font library cannot parse some of the Mac fonts (damned resource forks), so it warns you. Personally, I think the warnings are a bit overzealous and should be silenced. It's not as if the user is explicitly telling the font manager to load those specific fonts. They are automatically and unavoidably attempted. > WX / MATPLOTLIB FAILURE > ------ > > 4 % python Try running with pythonw. -- Robert Kern "I have come to believe that the whole world is an enigma, a harmless enigma that is made terrible by our own mad attempt to interpret it as though it had an underlying truth." -- Umberto Eco - Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys - and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] How do I include the stop value in the array by using arrayrange?
[EMAIL PROTECTED] wrote: > Hi,all: > How do I include the stop value in the array by using arrayrange? > Say: > arrayrange(0,10,1.0,Float) > [ 0., 1., 2., 3., 4., 5., 6., 7., 8., 9.,] > but I want 10 to be included 1. arrayrange() is a deprecated name. arange() is the preferred name. 2. However, arange() with floating point numbers is unreliable. Because of floating point precision issues, it is often difficult to tell whether or not the endpoint will be included. Use linspace() instead. -- Robert Kern "I have come to believe that the whole world is an enigma, a harmless enigma that is made terrible by our own mad attempt to interpret it as though it had an underlying truth." -- Umberto Eco - Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys - and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] tex problem
[EMAIL PROTECTED] wrote:
> I tried:
>
> label='$\textrm{test}_2$
> xlabel(r label)
> xlabel(r+label)
>
> etc but it not working (like I expected). So I would like to know if there
> are
> a way to precise that the text is a raw string by another thing that the r
> character just before the string. Perhaps that will be good to have an option
> like raw=true or something similar?
There is no such thing as a raw string *object*. There are only raw string
*literals*. The r'' determines how the source code is parsed, not how the
contents of the object is treated.
label = r'$\textrm{test}_2$'
xlabel(label)
After the source code containing the string literal is parsed, the string is
simply a string.
--
Robert Kern
"I have come to believe that the whole world is an enigma, a harmless enigma
that is made terrible by our own mad attempt to interpret it as though it had
an underlying truth."
-- Umberto Eco
-
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Get stuff done quickly with pre-integrated technology to make your job easier
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Re: [Matplotlib-users] bug in numerix?
[EMAIL PROTECTED] wrote: > But why the compatibility function is used? Not the new one from numpy? I > didn't ask for a Numeric compatibility? > I don't understand the need to have the Numeric function when I'm using numpy. The numerix layer is also used internally by matplotlib such that it does not need to have three different implementations to support the three array packages. It serves to be a uniform layer over the three packages, not just serve as a common place to get array functions from. That it is also exposed by importing everything from pylab is a side effect. If you don't want this, then you can configure ipython to import everything you want from numpy *after* pylab. -- Robert Kern "I have come to believe that the whole world is an enigma, a harmless enigma that is made terrible by our own mad attempt to interpret it as though it had an underlying truth." -- Umberto Eco - Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys -- and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] can't get started
David S. wrote: > I have just installed numpy-0.9.8, scipy-0.4.9, and matplotlib-0.87.2 on a > Windows machine with Python 2.4.2. > > When I import pylab, I get some Windows message box indicating an error in > multiarray.pyd and am kicked out of interactive Python. Please paste the exact error message here. -- Robert Kern "I have come to believe that the whole world is an enigma, a harmless enigma that is made terrible by our own mad attempt to interpret it as though it had an underlying truth." -- Umberto Eco ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
