[Matplotlib-users] Update a contour plot
Hi, is there a way to update a contour plot? I need to display a series of contour plots from a directory with data files and want to view them consecutively, preferrably without building a gui for it. Is there an easy way out? Cheers, Ralph -- Come build with us! The BlackBerryreg; 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#45;12, 2009. Register now#33; http://p.sf.net/sfu/devconf ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
[Matplotlib-users] Building matplotlib 0.99.1.1: cannot find -ltk8.5
Hi, I'm having trouble building matplotlib 0.99.1.1 (transcript below). I'm using copies of Python (2.5.1) and Tcl/Tk (8.5.5) that I have built myself, and that are apparently working fine. Previously, I was using this exact procedure to build 0.91.4 without any problems. Any suggestions would be greatly appreciated - thanks! Chris $ cd matplotlib-0.99.1.1 $ env PREFIX=/a/b/ LD_LIBRARY_PATH=/a/b/lib /a/b/bin/python setup.py build BUILDING MATPLOTLIB matplotlib: 0.99.1.1 python: 2.5.1 (r251:54863, Feb 5 2009, 13:11:08) [GCC 4.1.2 20071124 (Red Hat 4.1.2-42)] platform: linux2 REQUIRED DEPENDENCIES numpy: 1.2.1 freetype2: 9.10.3 OPTIONAL BACKEND DEPENDENCIES libpng: 1.2.10 Tkinter: Tkinter: 50704, Tk: 8.5, Tcl: 8.5 Gtk+: no * Building for Gtk+ requires pygtk; you must be able * to import gtk in your build/install environment Mac OS X native: no Qt: no Qt4: no Cairo: no OPTIONAL DATE/TIMEZONE DEPENDENCIES datetime: present, version unknown dateutil: matplotlib will provide pytz: matplotlib will provide adding pytz OPTIONAL USETEX DEPENDENCIES dvipng: 1.5 ghostscript: 8.15.2 latex: 3.141592 pdftops: 3.00 [Edit setup.cfg to suppress the above messages] pymods ['pylab'] packages ['matplotlib', 'matplotlib.backends', 'matplotlib.projections', 'mpl_toolkits', 'mpl_toolkits.mplot3d', 'mpl_too\ lkits.axes_grid', 'matplotlib.sphinxext', 'matplotlib.numerix', 'matplotlib.numerix.mlab', 'matplotlib.numerix.ma', 'matp\ lotlib.numerix.linear_algebra', 'matplotlib.numerix.random_array', 'matplotlib.numerix.fft', 'matplotlib.delaunay', 'pytz\ ', 'dateutil', 'dateutil/zoneinfo'] running build running build_py copying lib/matplotlib/mpl-data/matplotlibrc - build/lib.linux-i686-2.5/matplotlib/mpl-data copying lib/matplotlib/mpl-data/matplotlib.conf - build/lib.linux-i686-2.5/matplotlib/mpl-data running build_ext building 'matplotlib.backends._tkagg' extension g++ -pthread -shared build/temp.linux-i686-2.5/src/agg_py_transforms.o build/temp.linux-i686-2.5/src/_tkagg.o build/temp.\ linux-i686-2.5/CXX/cxx_extensions.o build/temp.linux-i686-2.5/CXX/cxxsupport.o build/temp.linux-i686-2.5/CXX/IndirectPyth\ onInterface.o build/temp.linux-i686-2.5/CXX/cxxextensions.o -L/usr/lib -L/usr/lib -L/usr/local/lib -L/usr/lib -L/usr/lib6\ 4 -L/usr/local/lib -L/usr/lib -L/usr/lib64 -ltk8.5 -ltcl8.5 -lstdc++ -lm -lfreetype -lz -lstdc++ -lm -o build/lib.linux-i\ 686-2.5/matplotlib/backends/_tkagg.so /usr/bin/ld: cannot find -ltk8.5 collect2: ld returned 1 exit status error: command 'g++' failed with exit status 1 make: *** [matplotlib] Error 1 $ ls /a/b/lib/*tk* lib/libtk8.5.so lib/libtkstub8.5.a lib/tkConfig.sh ... -- Come build with us! The BlackBerryreg; 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#45;12, 2009. Register now#33; http://p.sf.net/sfu/devconf ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
[Matplotlib-users] Path object where different vertices use different transforms?
Is it possible to specify a path object that will use different transforms for different vertices? This is again related to plotting a box whose height is specified by data coords, but whose width is a constant in axes coords regardless of scale (so linear and log x-scales would produce a box of the same width). Ideally, I would draw a path like this: 1. the center of the box would be located at x and bottom and top would be y1, y2, all in data coords 2. I would move to (x,y1) at the bottom-center of the box. 3. The x value would now need to be converted to Axes coords, possibly by applying transData + transAxes.inverted 4. I would want to draw a line to (x-0.1, y1) where x is now in axes coords and y is still in data coords. Then up, then right, then down, and then close the polygon. How do I implement this? As I mentioned before, a blended transform would allow me to make the moves i am interested in. However, a change of scale would change the correspondence between data and axes coords, so the axes transform part of the blended axes would have to be recomputed everytime the scale changes based on where the (x,y1) point lands in the axes. Is this correct? Any suggestions are welcome...thanks! Uri -- Uri Laserson PhD Candidate, Biomedical Engineering Harvard Medical School (Genetics) Massachusetts Institute of Technology (Mathematics) phone +1 917 742 8019 laser...@mit.edu -- Come build with us! The BlackBerryreg; 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#45;12, 2009. Register now#33; http://p.sf.net/sfu/devconf ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
[Matplotlib-users] glumpy: fast OpenGL numpy visualization + matplotlib integration
Hi all, glumpy is a fast OpenGL visualization tool for numpy arrays coded on top of pyglet (http://www.pyglet.org/). The package contains many demos showing basic usage as well as integration with matplotlib. As a reference, the animation script available from matplotlib distribution runs at around 500 fps using glumpy instead of 30 fps on my machine. Package/screenshots/explanations at: http://www.loria.fr/~rougier/coding/glumpy.html (it does not require installation so you can run demos from within the glumpy directory). Nicolas -- Come build with us! The BlackBerryreg; 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#45;12, 2009. Register now#33; 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] Update a contour plot
Hi Ralph, I don't think there exists a function like the line-'set_data'-method for collections, which are generated by 'contour'. This particular method of lines only changes the data but leave anything else unchanged. I attached an easy approach of updating a contour plot (simply deleting old collections), but I'm not sure that this is the best solution. Kind regards, Matthias On Monday 28 September 2009 13:52:42 Ralph Kube wrote: Hi, is there a way to update a contour plot? I need to display a series of contour plots from a directory with data files and want to view them consecutively, preferrably without building a gui for it. Is there an easy way out? Cheers, Ralph update_contour_plot.py Description: application/python -- Come build with us! The BlackBerryreg; 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#45;12, 2009. Register now#33; 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] [Numpy-discussion] glumpy: fast OpenGL numpy visualization + matplotlib integration
On Mon, Sep 28, 2009 at 9:06 AM, Nicolas Rougier nicolas.roug...@loria.frwrote: Hi all, glumpy is a fast OpenGL visualization tool for numpy arrays coded on top of pyglet (http://www.pyglet.org/). The package contains many demos showing basic usage as well as integration with matplotlib. As a reference, the animation script available from matplotlib distribution runs at around 500 fps using glumpy instead of 30 fps on my machine. Package/screenshots/explanations at: http://www.loria.fr/~rougier/coding/glumpy.htmlhttp://www.loria.fr/%7Erougier/coding/glumpy.html (it does not require installation so you can run demos from within the glumpy directory). Nicolas ___ NumPy-Discussion mailing list numpy-discuss...@scipy.org http://mail.scipy.org/mailman/listinfo/numpy-discussion Hi Nicolas, This is technically called OpenGL backend, isn't it? It is nice that integrates with matplotlib, however 300 hundred lines of code indeed a lot of lines for an ordinary user. Do you think this could be further integrated into matplotlib with a wrapper to simplify its usage? -- Gökhan -- Come build with us! The BlackBerryreg; 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#45;12, 2009. Register now#33; 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] [Numpy-discussion] glumpy: fast OpenGL numpy visualization + matplotlib integration
Well, I've been starting working on a pyglet backend but it is currently painfully slow mainly because I do not know enough of the matplotlib internal machinery to really benefit from it. In the case of glumpy, the use of texture object for representing 2d arrays is a real speed boost since interpolation/colormap/heightmap is made on the GPU. Concerning matplotlib examples, the use of glumpy should be actually two lines of code: from pylab import * from glumpy import imshow, show but I did not package it this way yet (that is easy however). I guess the main question is whether people are interested in glumpy to have a quick dirty debug tool on top of matplotlib or whether they prefer a full fledged and fast pyglet/OpenGL backend (which is really harder). Nicolas On 28 Sep, 2009, at 18:05 , Gökhan Sever wrote: On Mon, Sep 28, 2009 at 9:06 AM, Nicolas Rougier nicolas.roug...@loria.fr wrote: Hi all, glumpy is a fast OpenGL visualization tool for numpy arrays coded on top of pyglet (http://www.pyglet.org/). The package contains many demos showing basic usage as well as integration with matplotlib. As a reference, the animation script available from matplotlib distribution runs at around 500 fps using glumpy instead of 30 fps on my machine. Package/screenshots/explanations at: http://www.loria.fr/~rougier/coding/glumpy.html (it does not require installation so you can run demos from within the glumpy directory). Nicolas ___ NumPy-Discussion mailing list numpy-discuss...@scipy.org http://mail.scipy.org/mailman/listinfo/numpy-discussion Hi Nicolas, This is technically called OpenGL backend, isn't it? It is nice that integrates with matplotlib, however 300 hundred lines of code indeed a lot of lines for an ordinary user. Do you think this could be further integrated into matplotlib with a wrapper to simplify its usage? -- Gökhan -- Come build with us! The BlackBerryreg; 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#45;12, 2009. Register now#33; http://p.sf.net/sfu/devconf___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users -- Come build with us! The BlackBerryreg; 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#45;12, 2009. Register now#33; http://p.sf.net/sfu/devconf___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
[Matplotlib-users] Update a contour plot
Hi, is there a way to update a contour plot? I need to display a series of contour plots from a directory with data files and want to view them consecutively, preferrably without building a gui for it. Is there an easy way out? Cheers, Ralph -- Come build with us! The BlackBerryreg; 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#45;12, 2009. Register now#33; http://p.sf.net/sfu/devconf ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
[Matplotlib-users] Plot Updating Strangeness
Hello,
I want to dynamically update a plot of the rate at which a neural network is
learning a function. Ideally, my python program would open up a window and
update the plot inside of it after every training epoch.
I have written the following code to do so:
pyplot.title('Learning Curve')
pyplot.xlabel('Epoch #')
pyplot.ylabel('Success rate (%)')
pyplot.plot(range(1, len(rates)+1), rates, 'r-')
pyplot.draw()
Note that I am also calling pyplot.ion() at the start of the program.
This *mostly* works. However, I run into a strange issue. If the figure
window is minimized/hidden, when I open it up, nothing shows up in it (the
content is only grey). The plot will appear only if the window is
maximized/visible when the plotting occurs. If I again minimize the window
after the plot was drawn, it goes back to being gray.
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[Matplotlib-users] trailing space in text string stripped, making it impossible to right-pad my text
Hello. My problem is as follows: (ipython --pylab) from pylab import * pp=plot([0,0],[1,1]) text(xlim()[0],1,'Need padding ',horizontalalignment='left') text(xlim()[1],1,'Need padding ',horizontalalignment='right') The second case does not do what I want, which is to pad the text on the right. Text strings are stripped on the right, but no on the left. How can I elegantly create a character of space? Thanks! c -- View this message in context: http://www.nabble.com/trailing-space-in-text-string-stripped%2C-making-it-impossible-to-right-pad-my-text-tp25639703p25639703.html Sent from the matplotlib - users mailing list archive at Nabble.com. -- Come build with us! The BlackBerryreg; 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#45;12, 2009. Register now#33; 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] Simplified version of double-axis time example (beta)
There is
On Sun, Sep 27, 2009 at 8:49 PM, Gökhan Sever gokhanse...@gmail.com wrote:
On Sun, Sep 27, 2009 at 7:44 PM, Jae-Joon Lee lee.j.j...@gmail.comwrote:
On Sun, Sep 27, 2009 at 4:18 PM, Gökhan Sever gokhanse...@gmail.com
wrote:
When I run this as it is, and zoom once the top x-axis ticklabels
disappear:
http://img2.imageshack.us/img2/5493/zoom1.png
After commenting these three lines:
#locator= MinuteLocator(interval=1)
#locator= SecondLocator(interval=30)
#par2.xaxis.set_major_locator(locator)
and running I get somewhat nice view after zooms:
http://img340.imageshack.us/img340/6632/zoom2.png
with a minute discrepancy; resulting with shifts on the top x-labels.
Any last thoughts?
I believe that this is due to wrong tick locations. As you easily
guess, the default tick locators are not suitable for datetime ticks
and this is why we have separate locators. Please take a look at
documentations.
http://matplotlib.sourceforge.net/api/dates_api.html
If you want to have locator that works for several zoom levels, you
may try AutoDateLocator.
from matplotlib.dates import DateFormatter, MinuteLocator,
SecondLocator, AutoDateLocator, AutoDateFormatter
locator= AutoDateLocator()
par2.xaxis.set_major_locator(locator)
formatter=AutoDateFormatter(locator)
par2.xaxis.set_major_formatter(formatter)
par2.axis[top].major_ticklabels.set(rotation=30,
ha=left,
va=bottom)
While the AutoLocator seems to give too may ticks in my opinion, I
think this is as far as I can help.
Regards,
-JJ
Yep, thanks. That gives so many ticks indeed. Would be nicer to see labels
in every other tick.
This said,
locator = SecondLocator(interval=20)
par2.xaxis.set_major_locator(locator)
par2.xaxis.set_major_formatter(DateFormatter('%H:%M:%S'))
satisfies my initial thoughts. With some pan and zoom I can achieve what I
want.
Attaching the final modified file. I think this is a good demonstrative
example. It is up to you further put the script into the axes_grid examples.
Thanks again for your efforts.
There is still issues with this approach. First and foremost it is very slow
when the arrays plotted are big (in my case ~8000 points.)
AutoDateLocator() works fast, however on some zoomings the top axis is
filled with labels. This needs to be addressed.
Could anyone help me to see the flow of the AutoDateLocator() class'
updates? It only behaves weird on some certain zooms, put how is this
updated on the screen is a mystery to me so far. I have Eclipse + PyDev, but
don't know where should I set the breakpoints to analyse this behaviour?
Thanks.
On Sun, Sep 27, 2009 at 2:12 PM, Jae-Joon Lee lee.j.j...@gmail.com
wrote:
Here it is.
-JJ
On Sun, Sep 27, 2009 at 3:09 PM, Gökhan Sever gokhanse...@gmail.com
wrote:
JJ,
Could you please re-attach the code? Apparently, it has been
forgotten
on
your reply.
Thanks.
On Sun, Sep 27, 2009 at 1:50 PM, Jae-Joon Lee lee.j.j...@gmail.com
wrote:
Here is the modified version of your code that works for me.
1) If you change trans_aux, you also need to plot your data in an
appropriate coordinate. Your original code did not work because you
scaled the xaxis of the second axes (par) but you were still
plotting
the original data, i.e., time need to be scaled if you want to
plot
it on par. The code below takes slightly different approach.
2) I fount that I was wrong with the factor of 3600. It needs to be
86400, i.e., a day in seconds. Also, The unit must be larger than 1.
Again, please take a look how datetime unit works.
Regards,
-JJ
import numpy as np
import matplotlib.pyplot as plt
import matplotlib.transforms as mtransforms
from mpl_toolkits.axes_grid.parasite_axes import SubplotHost
# Prepare some random data and time for seconds-from-midnight (sfm)
representation
ydata1 = np.random.random(100) * 1000
ydata2 = np.ones(100) / 2.
time = np.arange(3550, 3650)
fig = plt.figure()
host = SubplotHost(fig, 111)
fig.add_subplot(host)
# This is the heart of the example. We have to scale the axes
correctly.
aux_trans = mtransforms.Affine2D().translate(0., 0.).scale(3600,
ydata1.max())
par = host.twin(aux_trans)
host.set_xlabel(Time [sfm])
host.set_ylabel(Random Data 1)
par.set_ylabel(Random Data 2)
par.axis[right].label.set_visible(True)
p1, = host.plot(time, ydata1)
p2, = par.plot(time, ydata2)
host.axis[left].label.set_color(p1.get_color())
par.axis[right].label.set_color(p2.get_color())
host.axis[bottom].label.set_size(16)
host.axis[left].label.set_size(16)
par.axis[right].label.set_size(16)
# Move the title little upwards so it won't overlap with the
ticklabels
title = plt.title(Double time: SFM and HH:MM:SS,
[Matplotlib-users] basemap, transform_scalar question
I'm trying to 'automate' a few components within basemap. I have a pretty complicated, and assuredly poorly written, set of functions that allow me to 'dynamically' plot a grid of data (lon,lat). Here is one section where I try to deal with transforming the data based on the projection. 'data' is a grid, often of size 720x360 or 720x180, representing full globe or hemisphere at 0.5 degree resolution. 'outlon0', outlat0', and 'd*out' are the llcrnr coordinates and step. 'transform' is an option, that is set to True by default: 1680 ## set up transformations for the data array 1681 if m.projection not in ['cyl','merc','mill']: 1682 lats = np.arange( outlat0, ( outlat0 + ( numygrid*dyout ) ), dyout )[:-1] 1683 lons = np.arange( outlon0, ( outlon0 + ( numxgrid*dxout ) ), dxout )[:-1] 1684 data = data[:-1,:-1] 1685 else: 1686 lats = np.arange( outlat0, ( outlat0 + ( numygrid*dyout ) ), dyout ) 1687 lons = np.arange( outlon0, ( outlon0 + ( numxgrid*dxout ) ), dxout ) 1688 1689 ## transform to nx x ny regularly spaced native projection grid 1690 if transform: 1691 dx = 2.*np.pi*m.rmajor/len(lons) 1692 nx = int((m.xmax-m.xmin)/dx)+1; ny = int((m.ymax-m.ymin)/dx)+1 1693 if nx is 1: 1694 topodat = data 1695 else: 1696 topodat = m.transform_scalar(data,lons,lats,nx,ny) 1697 else: 1698 topodat = data The problem is, when I use the approach with a 'cyl' grid, then subsequently try to draw the lsmask, I get a failure. Is this approach incorrect? I had to use the if nx is 1 statement because it was crashing with zero division error in some cases. Thanks. -- View this message in context: http://www.nabble.com/basemap%2C-transform_scalar-question-tp25649437p25649437.html Sent from the matplotlib - users mailing list archive at Nabble.com. -- Come build with us! The BlackBerryreg; 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#45;12, 2009. Register now#33; 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] Path object where different vertices use different transforms?
I don't think the transformations framework is going to be of much help for automating this. You seem to be suggesting an x-axis where the center is in data coords and the width is in axes coords. Once you've added the two together, it will be impossible to separate them. I think the path of least resistance will be for you to create a new artist class and override the draw method, such that you can do all the necessary calculations based on the current values of the axes and data transforms on every draw. There's an example of creating a custom artist in api/line_with_text.py... Then it's just writing a draw method to do what you need to do -- you should be able to get at the axes transformations through self.axes.transAxes and self.axes.transData. I'm a bit busy today to really work that through, but hopefully that's enough to get you started. Mike Uri Laserson wrote: Is it possible to specify a path object that will use different transforms for different vertices? This is again related to plotting a box whose height is specified by data coords, but whose width is a constant in axes coords regardless of scale (so linear and log x-scales would produce a box of the same width). Ideally, I would draw a path like this: 1. the center of the box would be located at x and bottom and top would be y1, y2, all in data coords 2. I would move to (x,y1) at the bottom-center of the box. 3. The x value would now need to be converted to Axes coords, possibly by applying transData + transAxes.inverted 4. I would want to draw a line to (x-0.1, y1) where x is now in axes coords and y is still in data coords. Then up, then right, then down, and then close the polygon. How do I implement this? As I mentioned before, a blended transform would allow me to make the moves i am interested in. However, a change of scale would change the correspondence between data and axes coords, so the axes transform part of the blended axes would have to be recomputed everytime the scale changes based on where the (x,y1) point lands in the axes. Is this correct? Any suggestions are welcome...thanks! Uri -- Michael Droettboom Science Software Branch Operations and Engineering Division Space Telescope Science Institute Operated by AURA for NASA -- Come build with us! The BlackBerryreg; 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#45;12, 2009. Register now#33; 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] Path object where different vertices use different transforms?
Uri Laserson wrote: Is it possible to specify a path object that will use different transforms for different vertices? This is again related to plotting a box whose height is specified by data coords, but whose width is a constant in axes coords regardless of scale (so linear and log x-scales would produce a box of the same width). Ideally, I would draw a path like this: 1. the center of the box would be located at x and bottom and top would be y1, y2, all in data coords 2. I would move to (x,y1) at the bottom-center of the box. 3. The x value would now need to be converted to Axes coords, possibly by applying transData + transAxes.inverted 4. I would want to draw a line to (x-0.1, y1) where x is now in axes coords and y is still in data coords. Then up, then right, then down, and then close the polygon. How do I implement this? I must be missing something, because I still don't see why you can't do all this very simply by using a PolyCollection, with the vertices in axes coordinates and the offset in data coordinates. Eric As I mentioned before, a blended transform would allow me to make the moves i am interested in. However, a change of scale would change the correspondence between data and axes coords, so the axes transform part of the blended axes would have to be recomputed everytime the scale changes based on where the (x,y1) point lands in the axes. Is this correct? Any suggestions are welcome...thanks! Uri -- Come build with us! The BlackBerryreg; 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#45;12, 2009. Register now#33; 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] Path object where different vertices use different transforms?
If I understand correctly, the top and bottom of the box are in data coordinates, the x-center of the box is in data coordinates, only the width of the box is in axes coordinates. Is that correct? If so, a PolyCollection won't be able to do this (directly), since that would require both the width and height to be in axes coordinates. Mike Eric Firing wrote: Uri Laserson wrote: Is it possible to specify a path object that will use different transforms for different vertices? This is again related to plotting a box whose height is specified by data coords, but whose width is a constant in axes coords regardless of scale (so linear and log x-scales would produce a box of the same width). Ideally, I would draw a path like this: 1. the center of the box would be located at x and bottom and top would be y1, y2, all in data coords 2. I would move to (x,y1) at the bottom-center of the box. 3. The x value would now need to be converted to Axes coords, possibly by applying transData + transAxes.inverted 4. I would want to draw a line to (x-0.1, y1) where x is now in axes coords and y is still in data coords. Then up, then right, then down, and then close the polygon. How do I implement this? I must be missing something, because I still don't see why you can't do all this very simply by using a PolyCollection, with the vertices in axes coordinates and the offset in data coordinates. Eric As I mentioned before, a blended transform would allow me to make the moves i am interested in. However, a change of scale would change the correspondence between data and axes coords, so the axes transform part of the blended axes would have to be recomputed everytime the scale changes based on where the (x,y1) point lands in the axes. Is this correct? Any suggestions are welcome...thanks! Uri -- Come build with us! The BlackBerryreg; 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#45;12, 2009. Register now#33; http://p.sf.net/sfu/devconf ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users -- Michael Droettboom Science Software Branch Operations and Engineering Division Space Telescope Science Institute Operated by AURA for NASA -- Come build with us! The BlackBerryreg; 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#45;12, 2009. Register now#33; 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] Path object where different vertices use different transforms?
On Mon, Sep 28, 2009 at 16:03, Michael Droettboom md...@stsci.edu wrote: If I understand correctly, the top and bottom of the box are in data coordinates, the x-center of the box is in data coordinates, only the width of the box is in axes coordinates. Is that correct? If so, a That's exactly correct. PolyCollection won't be able to do this (directly), since that would require both the width and height to be in axes coordinates. In principle, could you use a blended tranform for that? Eitherway, I don't think it would work, because the patch objects would be drawn to specific Axes coords. If the scale is changed (e.g, by switching to log scale), then what would prompt the Axes coords to be recalculated? I was thinking earlier that I could compose the transData and transAxes.inverse transforms to recalculate where the new Axes coord should be, but Mike thought this approach would fail (though I'm still not exactly sure why, no doubt because of my own ignorance). Uri Mike Eric Firing wrote: Uri Laserson wrote: Is it possible to specify a path object that will use different transforms for different vertices? This is again related to plotting a box whose height is specified by data coords, but whose width is a constant in axes coords regardless of scale (so linear and log x-scales would produce a box of the same width). Ideally, I would draw a path like this: 1. the center of the box would be located at x and bottom and top would be y1, y2, all in data coords 2. I would move to (x,y1) at the bottom-center of the box. 3. The x value would now need to be converted to Axes coords, possibly by applying transData + transAxes.inverted 4. I would want to draw a line to (x-0.1, y1) where x is now in axes coords and y is still in data coords. Then up, then right, then down, and then close the polygon. How do I implement this? I must be missing something, because I still don't see why you can't do all this very simply by using a PolyCollection, with the vertices in axes coordinates and the offset in data coordinates. Eric As I mentioned before, a blended transform would allow me to make the moves i am interested in. However, a change of scale would change the correspondence between data and axes coords, so the axes transform part of the blended axes would have to be recomputed everytime the scale changes based on where the (x,y1) point lands in the axes. Is this correct? Any suggestions are welcome...thanks! Uri -- Come build with us! The BlackBerryreg; 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#45;12, 2009. Register now#33; http://p.sf.net/sfu/devconf ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users -- Michael Droettboom Science Software Branch Operations and Engineering Division Space Telescope Science Institute Operated by AURA for NASA -- Uri Laserson PhD Candidate, Biomedical Engineering Harvard Medical School (Genetics) Massachusetts Institute of Technology (Mathematics) phone +1 917 742 8019 laser...@mit.edu -- Come build with us! The BlackBerryreg; 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#45;12, 2009. Register now#33; 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] Path object where different vertices use different transforms?
On Mon, Sep 28, 2009 at 4:15 PM, Uri Laserson laser...@mit.edu wrote: On Mon, Sep 28, 2009 at 16:03, Michael Droettboom md...@stsci.edu wrote: If I understand correctly, the top and bottom of the box are in data coordinates, the x-center of the box is in data coordinates, only the width of the box is in axes coordinates. Is that correct? If so, a That's exactly correct. I personally think that a box, whose height has a physical meaning (in data coordinate) while its width does not, is not a good representation of your data. A vertical line or something like errorbar seems to be more suitable to me. PolyCollection won't be able to do this (directly), since that would require both the width and height to be in axes coordinates. In principle, could you use a blended tranform for that? Eitherway, I don't think it would work, because the patch objects would be drawn to specific Axes coords. If the scale is changed (e.g, by switching to log scale), then what would prompt the Axes coords to be recalculated? I was thinking earlier that I could compose the transData and transAxes.inverse transforms to recalculate where the new Axes coord should be, but Mike thought this approach would fail (though I'm still not exactly sure why, no doubt because of my own ignorance). As Mike has explained, the transform trick (blended or not) won't work. The width and y-center will be always transformed with the same transform, which is not what you want. I think you need to create a custom patch class for this to work. One option seems to subclass the Rectangle class and overide the _update_patch_transform method. The patch transform is used to transform a unit rectangle to a rectangle in data coordinate (or whatever coordinate the patch uses), i.e., you need to calculate the coordinate of the box in the data coordinate(or whatever coordinate the patch uses). -JJ Uri Mike Eric Firing wrote: Uri Laserson wrote: Is it possible to specify a path object that will use different transforms for different vertices? This is again related to plotting a box whose height is specified by data coords, but whose width is a constant in axes coords regardless of scale (so linear and log x-scales would produce a box of the same width). Ideally, I would draw a path like this: 1. the center of the box would be located at x and bottom and top would be y1, y2, all in data coords 2. I would move to (x,y1) at the bottom-center of the box. 3. The x value would now need to be converted to Axes coords, possibly by applying transData + transAxes.inverted 4. I would want to draw a line to (x-0.1, y1) where x is now in axes coords and y is still in data coords. Then up, then right, then down, and then close the polygon. How do I implement this? I must be missing something, because I still don't see why you can't do all this very simply by using a PolyCollection, with the vertices in axes coordinates and the offset in data coordinates. Eric As I mentioned before, a blended transform would allow me to make the moves i am interested in. However, a change of scale would change the correspondence between data and axes coords, so the axes transform part of the blended axes would have to be recomputed everytime the scale changes based on where the (x,y1) point lands in the axes. Is this correct? Any suggestions are welcome...thanks! Uri -- Come build with us! The BlackBerryreg; 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#45;12, 2009. Register now#33; http://p.sf.net/sfu/devconf ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users -- Michael Droettboom Science Software Branch Operations and Engineering Division Space Telescope Science Institute Operated by AURA for NASA -- Uri Laserson PhD Candidate, Biomedical Engineering Harvard Medical School (Genetics) Massachusetts Institute of Technology (Mathematics) phone +1 917 742 8019 laser...@mit.edu -- Come build with us! The BlackBerryreg; 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#45;12, 2009. Register now#33; 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] Path object where different vertices use different transforms?
Is the attached sort of what you want? It defines a custom rectangle by (x, w, y1, y2) and overrides the get_transform of the patch to update itself at draw time. Mike Uri Laserson wrote: On Mon, Sep 28, 2009 at 16:03, Michael Droettboom md...@stsci.edu wrote: If I understand correctly, the top and bottom of the box are in data coordinates, the x-center of the box is in data coordinates, only the width of the box is in axes coordinates. Is that correct? If so, a That's exactly correct. PolyCollection won't be able to do this (directly), since that would require both the width and height to be in axes coordinates. In principle, could you use a blended tranform for that? Eitherway, I don't think it would work, because the patch objects would be drawn to specific Axes coords. If the scale is changed (e.g, by switching to log scale), then what would prompt the Axes coords to be recalculated? I was thinking earlier that I could compose the transData and transAxes.inverse transforms to recalculate where the new Axes coord should be, but Mike thought this approach would fail (though I'm still not exactly sure why, no doubt because of my own ignorance). Uri Mike Eric Firing wrote: Uri Laserson wrote: Is it possible to specify a path object that will use different transforms for different vertices? This is again related to plotting a box whose height is specified by data coords, but whose width is a constant in axes coords regardless of scale (so linear and log x-scales would produce a box of the same width). Ideally, I would draw a path like this: 1. the center of the box would be located at x and bottom and top would be y1, y2, all in data coords 2. I would move to (x,y1) at the bottom-center of the box. 3. The x value would now need to be converted to Axes coords, possibly by applying transData + transAxes.inverted 4. I would want to draw a line to (x-0.1, y1) where x is now in axes coords and y is still in data coords. Then up, then right, then down, and then close the polygon. How do I implement this? I must be missing something, because I still don't see why you can't do all this very simply by using a PolyCollection, with the vertices in axes coordinates and the offset in data coordinates. Eric As I mentioned before, a blended transform would allow me to make the moves i am interested in. However, a change of scale would change the correspondence between data and axes coords, so the axes transform part of the blended axes would have to be recomputed everytime the scale changes based on where the (x,y1) point lands in the axes. Is this correct? Any suggestions are welcome...thanks! Uri -- Come build with us! The BlackBerryreg; 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#45;12, 2009. Register now#33; http://p.sf.net/sfu/devconf ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users -- Michael Droettboom Science Software Branch Operations and Engineering Division Space Telescope Science Institute Operated by AURA for NASA -- Michael Droettboom Science Software Branch Operations and Engineering Division Space Telescope Science Institute Operated by AURA for NASA import numpy as np import matplotlib.pyplot as plt import matplotlib.patches as mpatches import matplotlib.transforms as mtransforms import matplotlib.path as mpath class MyBox(mpatches.Patch): def __init__(self, x, w, y1, y2, **kwargs): self.x = x self.w = w self.y1 = y1 self.y2 = y2 mpatches.Patch.__init__(self, **kwargs) def get_path(self): return mpath.Path.unit_rectangle() def get_transform(self): # Transform the data-relative values box = [[self.x, self.y1], [self.x, self.y2]] box = self.axes.transData.transform(box) # Get the width as a fraction of the axes width w = self.w * self.axes.bbox.width / 2.0 # Add it to the data-transformed coordinates box[0][0] -= w box[1][0] += w return mtransforms.BboxTransformTo(mtransforms.Bbox(box)) fig = plt.figure() ax = fig.add_subplot(111) patch = MyBox(0, 0.1, 0.5, 1.5) ax.add_patch(patch) ax.set_xlim((-1, 1)) ax.set_ylim((0, 2)) plt.show() -- Come build with us! The BlackBerryreg; 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#45;12, 2009.
Re: [Matplotlib-users] trailing space in text string stripped, making it impossible to right-pad my text
Christopher Barrington-Leigh wrote: Hello. My problem is as follows: (ipython --pylab) from pylab import * pp=plot([0,0],[1,1]) text(xlim()[0],1,'Need padding ',horizontalalignment='left') text(xlim()[1],1,'Need padding ',horizontalalignment='right') The second case does not do what I want, which is to pad the text on the right. Text strings are stripped on the right, but no on the left. How can I elegantly create a character of space? Thanks! c Untested, but I think you could do this with just python builtin types: from pylab import * pp=plot([0,0],[1,1]) text(xlim()[0],1,'string'.ljust(10,' ')) text(xlim()[1],1,'string'.rjust(10,' ')) See the documention: http://docs.python.org/library/stdtypes.html str.ljust(width[, fillchar])¶ Return the string left justified in a string of length width. Padding is done using the specified fillchar (default is a space). The original string is returned if width is less than len(s). Changed in version 2.4: Support for the fillchar argument. -- View this message in context: http://www.nabble.com/trailing-space-in-text-string-stripped%2C-making-it-impossible-to-right-pad-my-text-tp25639703p25653102.html Sent from the matplotlib - users mailing list archive at Nabble.com. -- Come build with us! The BlackBerryreg; 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#45;12, 2009. Register now#33; 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] Update a contour plot
Ralph Kube-2 wrote: Is there an easy way out? Well, you could just script it and create .png files I do it all the time. -- View this message in context: http://www.nabble.com/Update-a-contour-plot-tp25648878p25653140.html Sent from the matplotlib - users mailing list archive at Nabble.com. -- Come build with us! The BlackBerryreg; 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#45;12, 2009. Register now#33; 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] trailing space in text string stripped, making it impossible to right-pad my text
I can confirm this with latest svn. I take a quick look at the code, but couldn't figure where the stripping happens and I hope other experts to step in. While I think you're not using usetex mode, you may use tex's own spacing command with usetex mode. Depending on your need, you may also use the annotate function with which you can provide a spacing in pixel coordinate (or other coordinate the annotate supports). Regards, -JJ On Sun, Sep 27, 2009 at 9:57 PM, Christopher Barrington-Leigh cpblpublic+nab...@gmail.com wrote: Hello. My problem is as follows: (ipython --pylab) from pylab import * pp=plot([0,0],[1,1]) text(xlim()[0],1,' Need padding ',horizontalalignment='left') text(xlim()[1],1,' Need padding ',horizontalalignment='right') The second case does not do what I want, which is to pad the text on the right. Text strings are stripped on the right, but no on the left. How can I elegantly create a character of space? Thanks! c -- View this message in context: http://www.nabble.com/trailing-space-in-text-string-stripped%2C-making-it-impossible-to-right-pad-my-text-tp25639703p25639703.html Sent from the matplotlib - users mailing list archive at Nabble.com. -- Come build with us! The BlackBerryreg; 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#45;12, 2009. Register now#33; http://p.sf.net/sfu/devconf ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users -- Come build with us! The BlackBerryreg; 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#45;12, 2009. Register now#33; 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] trailing space in text string stripped, making it impossible to right-pad my text
Thanks. Unfortunately this gives me the same results: no good. Something is stripping whatever filler is there on the right. text(xlim()[1],1.01,'string'.ljust(10,' '),horizontalalignment='right') John [H2O] wrote: Christopher Barrington-Leigh wrote: Hello. My problem is as follows: (ipython --pylab) from pylab import * pp=plot([0,0],[1,1]) text(xlim()[0],1,'Need padding ',horizontalalignment='left') text(xlim()[1],1,'Need padding ',horizontalalignment='right') The second case does not do what I want, which is to pad the text on the right. Text strings are stripped on the right, but no on the left. How can I elegantly create a character of space? Thanks! c Untested, but I think you could do this with just python builtin types: from pylab import * pp=plot([0,0],[1,1]) text(xlim()[0],1,'string'.ljust(10,' ')) text(xlim()[1],1,'string'.rjust(10,' ')) See the documention: http://docs.python.org/library/stdtypes.html str.ljust(width[, fillchar])¶ Return the string left justified in a string of length width. Padding is done using the specified fillchar (default is a space). The original string is returned if width is less than len(s). Changed in version 2.4: Support for the fillchar argument. -- View this message in context: http://www.nabble.com/trailing-space-in-text-string-stripped%2C-making-it-impossible-to-right-pad-my-text-tp25639703p25653331.html Sent from the matplotlib - users mailing list archive at Nabble.com. -- Come build with us! The BlackBerryreg; 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#45;12, 2009. Register now#33; 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] trailing space in text string stripped, making it impossible to right-pad my text
All my attempts at using TeX spacing failed too. What do you have in mind? e.g. text(xlim()[1],1.02,r'$r^\;2$~~~',horizontalalignment='right') Jae-Joon Lee wrote: While I think you're not using usetex mode, you may use tex's own spacing command with usetex mode. Depending on your need, you may also use the annotate function with which you can provide a spacing in pixel coordinate (or other coordinate the annotate supports). -- View this message in context: http://www.nabble.com/trailing-space-in-text-string-stripped%2C-making-it-impossible-to-right-pad-my-text-tp25639703p25653573.html Sent from the matplotlib - users mailing list archive at Nabble.com. -- Come build with us! The BlackBerryreg; 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#45;12, 2009. Register now#33; http://p.sf.net/sfu/devconf ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
[Matplotlib-users] Basemap calls to colorbar() failing
Jeff, Right now, for me, any Basemap example that uses colorbar() is broken for me. I think there's a problem with how Basemap sets the current 'image' so that a colorbar can be automatically generated for plots. The code currently does: plt.gci._current = ret I think the current image handling in matplotlib itself was reworked (at least according to SVN logs, r7494), so that now instead there's a setter function: plt.sci(ret) I'd be happy fix these myself if you're too busy. Ryan -- Ryan May Graduate Research Assistant School of Meteorology University of Oklahoma -- Come build with us! The BlackBerryreg; 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#45;12, 2009. Register now#33; 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] Basemap calls to colorbar() failing
Ryan May wrote: Jeff, Right now, for me, any Basemap example that uses colorbar() is broken for me. I think there's a problem with how Basemap sets the current 'image' so that a colorbar can be automatically generated for plots. The code currently does: plt.gci._current = ret I think the current image handling in matplotlib itself was reworked (at least according to SVN logs, r7494), so that now instead there's a setter function: plt.sci(ret) I'd be happy fix these myself if you're too busy. Ryan Ryan: I'm off to Australia for a conference tomorrow, so if you could fix that I'd be grateful. I wonder if we shouldn't wrap the old plt.gci._current = ret in a try/except, and use the new way if an Attribute Error is raised. That way, it will still work with old versions of matplotlib. Thanks for catching this. -Jeff -- Jeffrey S. Whitaker Phone : (303)497-6313 Meteorologist FAX: (303)497-6449 NOAA/OAR/PSD R/PSD1Email : jeffrey.s.whita...@noaa.gov 325 BroadwayOffice : Skaggs Research Cntr 1D-113 Boulder, CO, USA 80303-3328 Web: http://tinyurl.com/5telg -- Come build with us! The BlackBerryreg; 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#45;12, 2009. Register now#33; 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] Basemap calls to colorbar() failing
On Mon, Sep 28, 2009 at 4:54 PM, Jeff Whitaker jsw...@fastmail.fm wrote: Ryan May wrote: Jeff, Right now, for me, any Basemap example that uses colorbar() is broken for me. I think there's a problem with how Basemap sets the current 'image' so that a colorbar can be automatically generated for plots. The code currently does: plt.gci._current = ret I think the current image handling in matplotlib itself was reworked (at least according to SVN logs, r7494), so that now instead there's a setter function: plt.sci(ret) I'd be happy fix these myself if you're too busy. Ryan Ryan: I'm off to Australia for a conference tomorrow, so if you could fix that I'd be grateful. I wonder if we shouldn't wrap the old plt.gci._current = ret in a try/except, and use the new way if an Attribute Error is raised. That way, it will still work with old versions of matplotlib. Trying both sounds like a good idea, since I just noticed this change is only in SVN trunk, and not in the 0.99.x series (which is probably why no one noticed). However, no attribute error is raised when setting the attribute, it's just never used. I'll see if I can come up with something similar that will work. Ryan -- Ryan May Graduate Research Assistant School of Meteorology University of Oklahoma Sent from Norman, Oklahoma, United States -- Come build with us! The BlackBerryreg; 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#45;12, 2009. Register now#33; http://p.sf.net/sfu/devconf ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
[Matplotlib-users] Subplots, multiple bar3d plots + titling
Greetings,
I would like to plot to make a figure with 3 subplots
of the form (221) to (223):
- each subplot should show a bar3d plot of a matrix
- each subplot should have it's own title
The problems:
a) I don't see (nor did i find something) how i can
use subplots combined with bar3d (from the mpl_toolkits.mplot3d)
package.
b) I don't manage to give the 3d bar plot a title. In the attached
code you will see that a title is set, but it does not show
up in the figure
Could someone please help me out with these problems?
Thanks,
q
-
The code for the basic plot of the matrix:
from mpl_toolkits.mplot3d import Axes3D
import matplotlib.pyplot as plt
from matplotlib.ticker import FixedFormatter, LinearLocator, FixedLocator
from numpy import *
psi=1/sqrt(2)*array([1, 0, 0, 1])
rho=outer(psi,psi)
fig = plt.figure()
ax = Axes3D(fig)
elements = (len(rho) * len(rho))
xpos, ypos = meshgrid(array(range(len(rho)))+0.25, array(range(len(rho)))+0.25)
xpos = xpos.flatten()
ypos = ypos.flatten()
zpos = zeros(elements)
dx = 0.5 * ones_like(zpos)
dy = dx.copy()
dz = absolute(rho.flatten())
ax.set_title('absolute')
ax.bar3d(xpos, ypos, zpos, dx, dy, dz, color='#F8F800')
plt.show()
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Re: [Matplotlib-users] trailing space in text string stripped, making it impossible to right-pad my text
Hmm, I'm afraid that this only works if you use preview mode. I
haven't tested, but I guess it will fail without it. Check if
rcParams[text.latex.preview]==True.
-JJ
On Mon, Sep 28, 2009 at 6:26 PM, Jae-Joon Lee lee.j.j...@gmail.com wrote:
You need an empty mbox at the end of line (\mbox{}).
text(xlim()[1],1.02,r'$r^2$~~~\mbox{}',horizontalalignment='right')
If you did mean \; after ^, it requires {}.
Again, these only works if you use real TeX for text rendering (ie
usetex=True), not the mpl's mathtext mode.
Regards,
-JJ
On Mon, Sep 28, 2009 at 5:48 PM, Christopher Barrington-Leigh
cpblpublic+nab...@gmail.com wrote:
All my attempts at using TeX spacing failed too. What do you have in mind?
e.g.
text(xlim()[1],1.02,r'$r^\;2$~~~',horizontalalignment='right')
Jae-Joon Lee wrote:
While I think you're not using usetex mode, you may use tex's own
spacing command with usetex mode. Depending on your need, you may also
use the annotate function with which you can provide a spacing in
pixel coordinate (or other coordinate the annotate supports).
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Re: [Matplotlib-users] Path object where different vertices use different transforms?
Hi Mike,
This is definitely on the right track. Thanks a lot for writing it
out. When I change the view limits, indeed the width stays constant
while the height gets rescaled. However, when I try to change to a
logarithmic axis, I get the following errors. Again, excuse my
ignorance, but I am not sure where exactly the offense is and how to
fix it.
In [57]: ax.set_xscale('log')
In [58]: plt.draw()
ERROR: An unexpected error occurred while tokenizing input
The following traceback may be corrupted or invalid
The error message is: ('EOF in multi-line statement', (568, 0))
ERROR: An unexpected error occurred while tokenizing input
The following traceback may be corrupted or invalid
The error message is: ('EOF in multi-line statement', (568, 0))
ERROR: An unexpected error occurred while tokenizing input
The following traceback may be corrupted or invalid
The error message is: ('EOF in multi-line statement', (568, 0))
---
TypeError Traceback (most recent call last)
/Users/laserson/Desktop/ipython console in module()
/Library/Frameworks/Python.framework/Versions/4.3.0/lib/python2.5/site-packages/matplotlib/pyplot.pyc
in draw()
348 def draw():
349 'redraw the current figure'
-- 350 get_current_fig_manager().canvas.draw()
351
352 @docstring.copy_dedent(Figure.savefig)
/Library/Frameworks/Python.framework/Versions/4.3.0/lib/python2.5/site-packages/matplotlib/backends/backend_tkagg.pyc
in draw(self)
213
214 def draw(self):
-- 215 FigureCanvasAgg.draw(self)
216 tkagg.blit(self._tkphoto, self.renderer._renderer, colormode=2)
217 self._master.update_idletasks()
/Library/Frameworks/Python.framework/Versions/4.3.0/lib/python2.5/site-packages/matplotlib/backends/backend_agg.pyc
in draw(self)
376
377 self.renderer = self.get_renderer()
-- 378 self.figure.draw(self.renderer)
379
380 def get_renderer(self):
/Library/Frameworks/Python.framework/Versions/4.3.0/lib/python2.5/site-packages/matplotlib/artist.pyc
in draw_wrapper(artist, renderer, *kl)
53 def draw_wrapper(artist, renderer, *kl):
54 before(artist, renderer)
--- 55 draw(artist, renderer, *kl)
56 after(artist, renderer)
57
/Library/Frameworks/Python.framework/Versions/4.3.0/lib/python2.5/site-packages/matplotlib/figure.pyc
in draw(self, renderer)
770
771 # render the axes
-- 772 for a in self.axes: a.draw(renderer)
773
774 # render the figure text
/Library/Frameworks/Python.framework/Versions/4.3.0/lib/python2.5/site-packages/matplotlib/artist.pyc
in draw_wrapper(artist, renderer, *kl)
53 def draw_wrapper(artist, renderer, *kl):
54 before(artist, renderer)
--- 55 draw(artist, renderer, *kl)
56 after(artist, renderer)
57
/Library/Frameworks/Python.framework/Versions/4.3.0/lib/python2.5/site-packages/matplotlib/axes.pyc
in draw(self, renderer, inframe)
1743
1744 for zorder, i, a in dsu:
- 1745 a.draw(renderer)
1746
1747 renderer.close_group('axes')
/Library/Frameworks/Python.framework/Versions/4.3.0/lib/python2.5/site-packages/matplotlib/artist.pyc
in draw_wrapper(artist, renderer, *kl)
53 def draw_wrapper(artist, renderer, *kl):
54 before(artist, renderer)
--- 55 draw(artist, renderer, *kl)
56 after(artist, renderer)
57
/Library/Frameworks/Python.framework/Versions/4.3.0/lib/python2.5/site-packages/matplotlib/patches.pyc
in draw(self, renderer)
353
354 path = self.get_path()
-- 355 transform = self.get_transform()
356 tpath = transform.transform_path_non_affine(path)
357 affine = transform.get_affine()
/Users/laserson/Desktop/testMyPatch.py in get_transform(self)
22 box = [[self.x, self.y1],
23 [self.x, self.y2]]
--- 24 box = self.axes.transData.transform(box)
25
26 # Get the width as a fraction of the axes width
/Library/Frameworks/Python.framework/Versions/4.3.0/lib/python2.5/site-packages/matplotlib/transforms.pyc
in transform(self, points)
1893 def transform(self, points):
1894 return self._b.transform(
- 1895 self._a.transform(points))
1896 transform.__doc__ = Transform.transform.__doc__
1897
/Library/Frameworks/Python.framework/Versions/4.3.0/lib/python2.5/site-packages/matplotlib/transforms.pyc
in transform(self, points)
1721 x_points = x.transform(points)[:, 0:1]
1722 else:
- 1723 x_points = x.transform(points[:, 0])
1724 x_points = x_points.reshape((len(x_points), 1))
1725
TypeError: list indices must be integers
On Mon, Sep 28, 2009 at 16:56, Michael Droettboom md...@stsci.edu wrote:
Is the attached sort of what you
Re: [Matplotlib-users] Path object where different vertices use different transforms?
On Mon, Sep 28, 2009 at 16:53, Jae-Joon Lee lee.j.j...@gmail.com wrote: I personally think that a box, whose height has a physical meaning (in data coordinate) while its width does not, is not a good representation of your data. A vertical line or something like errorbar seems to be more suitable to me. I agree, and if you're a fan of Edward Tufte, then you definitely agree. In his book, he takes the simple Tukey-style boxplot and turns it into a 1-dimension object, in line with the type of data it's representing. However, I still want to implement something that's a bit more traditional, which is why I wanted to pick an arbitrary width for the boxes that stay invariant regardless of the scale that I use. As Mike has explained, the transform trick (blended or not) won't work. The width and y-center will be always transformed with the same transform, which is not what you want. I think you need to create a custom patch class for this to work. One option seems to subclass the Rectangle class and overide the _update_patch_transform method. The patch transform is used to transform a unit rectangle to a rectangle in data coordinate (or whatever coordinate the patch uses), i.e., you need to calculate the coordinate of the box in the data coordinate(or whatever coordinate the patch uses). Could you possibly explain exactly what is going on and how this structurally differs from the approach that Mike posted? In Mike's code, he uses BboxTransformTo using the box he created in display coords. So this takes a unit square and spits out the box that I specify when I instantiate the custom patch (using data coords for x and y and axes coords for w). What is called to actually draw the box (i.e., when I execute plt.draw())? Is that get_path()? So basically, whenever MPL wants to draw a patch, does it always call get_path() and then runs it through whatever is returned from get_transform() to get the final shape in display coords? So how does this relate to the strategy that you are advocating? Is _update_patch_transform somehow a synonym for what I described in the paragraph above? I don't know where that fits into the picture. It may be useful to add something to the Working With Tranformations section or the Transformation Tutorial about what is minimally necessary to override for a custom patch. I have been playing around with MPL for some time now (albeit I don't have much computer visualization/graphics experience) and still have only a fuzzy idea of what order things are called in and what the overall strategy/structure of the system is like. Uri -JJ Uri Mike Eric Firing wrote: Uri Laserson wrote: Is it possible to specify a path object that will use different transforms for different vertices? This is again related to plotting a box whose height is specified by data coords, but whose width is a constant in axes coords regardless of scale (so linear and log x-scales would produce a box of the same width). Ideally, I would draw a path like this: 1. the center of the box would be located at x and bottom and top would be y1, y2, all in data coords 2. I would move to (x,y1) at the bottom-center of the box. 3. The x value would now need to be converted to Axes coords, possibly by applying transData + transAxes.inverted 4. I would want to draw a line to (x-0.1, y1) where x is now in axes coords and y is still in data coords. Then up, then right, then down, and then close the polygon. How do I implement this? I must be missing something, because I still don't see why you can't do all this very simply by using a PolyCollection, with the vertices in axes coordinates and the offset in data coordinates. Eric As I mentioned before, a blended transform would allow me to make the moves i am interested in. However, a change of scale would change the correspondence between data and axes coords, so the axes transform part of the blended axes would have to be recomputed everytime the scale changes based on where the (x,y1) point lands in the axes. Is this correct? Any suggestions are welcome...thanks! Uri -- Come build with us! The BlackBerryreg; 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#45;12, 2009. Register now#33; http://p.sf.net/sfu/devconf ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users -- Michael Droettboom Science Software Branch Operations and Engineering Division Space Telescope Science Institute Operated by AURA for NASA -- Uri Laserson PhD Candidate, Biomedical Engineering Harvard Medical School (Genetics) Massachusetts
[Matplotlib-users] python script
Hello, my problem is described very quickly: The package is installed. In the interpreter the 'import matplotlib' does not throw an error. On the other hand I tried to use matplotlib in a python script and here the very same command provokes the following error message: Traceback (most recent call last): File ./account3.py, line 13, in module import matplotlib ImportError: No module named matplotlib I would be greatful for any help/explanaiton. Cheers, Felix $ uname -aDarwin mac-screening-1 9.8.0 Darwin Kernel Version 9.8.0: Wed Jul 15 16:55:01 PDT 2009; root:xnu-1228.15.4~1/RELEASE_I386 i386 $ python Python 2.5.4 (r254:67917, Dec 23 2008, 14:57:27) [GCC 4.0.1 (Apple Computer, Inc. build 5363)] on darwin $ python -c 'import matplotlib; print matplotlib.__version__, matplotlib.__file__' 0.99.0 /Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/ site-packages/matplotlib/__init__.pyc The Package was downloaded from the link: http://sourceforge.net/projects/matplotlib/files/matplotlib/matplotlib-0.99.1/matplotlib-0.99.1.1-py2.5-macosx10.5.dmg/download -- Come build with us! The BlackBerryreg; 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#45;12, 2009. Register now#33; 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] Subplots, multiple bar3d plots + titling
I'm not sure its possible right now to do subplots with 3D.
As for the title, I cannot either put titles on any 3D graphs...
2009/9/28 qu...@gmx.at
Greetings,
I would like to plot to make a figure with 3 subplots
of the form (221) to (223):
- each subplot should show a bar3d plot of a matrix
- each subplot should have it's own title
The problems:
a) I don't see (nor did i find something) how i can
use subplots combined with bar3d (from the mpl_toolkits.mplot3d)
package.
b) I don't manage to give the 3d bar plot a title. In the attached
code you will see that a title is set, but it does not show
up in the figure
Could someone please help me out with these problems?
Thanks,
q
-
The code for the basic plot of the matrix:
from mpl_toolkits.mplot3d import Axes3D
import matplotlib.pyplot as plt
from matplotlib.ticker import FixedFormatter, LinearLocator, FixedLocator
from numpy import *
psi=1/sqrt(2)*array([1, 0, 0, 1])
rho=outer(psi,psi)
fig = plt.figure()
ax = Axes3D(fig)
elements = (len(rho) * len(rho))
xpos, ypos = meshgrid(array(range(len(rho)))+0.25,
array(range(len(rho)))+0.25)
xpos = xpos.flatten()
ypos = ypos.flatten()
zpos = zeros(elements)
dx = 0.5 * ones_like(zpos)
dy = dx.copy()
dz = absolute(rho.flatten())
ax.set_title('absolute')
ax.bar3d(xpos, ypos, zpos, dx, dy, dz, color='#F8F800')
plt.show()
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Re: [Matplotlib-users] Path object where different vertices use different transforms?
Could you possibly explain exactly what is going on and how this structurally differs from the approach that Mike posted? In Mike's code, he uses BboxTransformTo using the box he created in display coords. So this takes a unit square and spits out the box that I specify when I instantiate the custom patch (using data coords for x and y and axes coords for w). What is called to actually draw the box (i.e., when I execute plt.draw())? Is that get_path()? So basically, whenever MPL wants to draw a patch, does it always call get_path() and then runs it through whatever is returned from get_transform() to get the final shape in display coords? Your understanding is basically right. When plt.draw(or any equivalent) is called, the draw methods of each artists are called. And the draw method of the Patch class, in general, calls the get_path and get_transform, while details can be different. So how does this relate to the strategy that you are advocating? Is _update_patch_transform somehow a synonym for what I described in the paragraph above? I don't know where that fits into the picture. Yes, for the Rectangle class, its get_transform method returns a combined transform of patch_transform + default_artist_transform, where the patch_transform is used to transform the unit rectangle to the data coordinate. So, the basic idea is very similar to Mike's implementation, while Mike's should be more efficient as it transforms the unit rectangle directly to the canvas coordinate. It may be useful to add something to the Working With Tranformations section or the Transformation Tutorial about what is minimally necessary to override for a custom patch. I have been playing around with MPL for some time now (albeit I don't have much computer visualization/graphics experience) and still have only a fuzzy idea of what order things are called in and what the overall strategy/structure of the system is like. Well, right now, I guess the source code is your best tutor (which was and still is for me). You may start with the mpatches.Patch that Mike's MyBox inherit from. And any contribution will be greatly appreciated! -JJ Uri -JJ Uri Mike Eric Firing wrote: Uri Laserson wrote: Is it possible to specify a path object that will use different transforms for different vertices? This is again related to plotting a box whose height is specified by data coords, but whose width is a constant in axes coords regardless of scale (so linear and log x-scales would produce a box of the same width). Ideally, I would draw a path like this: 1. the center of the box would be located at x and bottom and top would be y1, y2, all in data coords 2. I would move to (x,y1) at the bottom-center of the box. 3. The x value would now need to be converted to Axes coords, possibly by applying transData + transAxes.inverted 4. I would want to draw a line to (x-0.1, y1) where x is now in axes coords and y is still in data coords. Then up, then right, then down, and then close the polygon. How do I implement this? I must be missing something, because I still don't see why you can't do all this very simply by using a PolyCollection, with the vertices in axes coordinates and the offset in data coordinates. Eric As I mentioned before, a blended transform would allow me to make the moves i am interested in. However, a change of scale would change the correspondence between data and axes coords, so the axes transform part of the blended axes would have to be recomputed everytime the scale changes based on where the (x,y1) point lands in the axes. Is this correct? Any suggestions are welcome...thanks! Uri -- Come build with us! The BlackBerryreg; 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#45;12, 2009. Register now#33; http://p.sf.net/sfu/devconf ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users -- Michael Droettboom Science Software Branch Operations and Engineering Division Space Telescope Science Institute Operated by AURA for NASA -- Uri Laserson PhD Candidate, Biomedical Engineering Harvard Medical School (Genetics) Massachusetts Institute of Technology (Mathematics) phone +1 917 742 8019 laser...@mit.edu -- Come build with us! The BlackBerryreg; 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#45;12,
Re: [Matplotlib-users] Path object where different vertices use different transforms?
The exception will go away if you explicitly use np.array as below.
box = np.array([[self.x, self.y1],
[self.x, self.y2]])
However, note that Mike's example has x-center at 0.
-JJ
On Mon, Sep 28, 2009 at 6:41 PM, Uri Laserson laser...@mit.edu wrote:
Hi Mike,
This is definitely on the right track. Thanks a lot for writing it
out. When I change the view limits, indeed the width stays constant
while the height gets rescaled. However, when I try to change to a
logarithmic axis, I get the following errors. Again, excuse my
ignorance, but I am not sure where exactly the offense is and how to
fix it.
In [57]: ax.set_xscale('log')
In [58]: plt.draw()
ERROR: An unexpected error occurred while tokenizing input
The following traceback may be corrupted or invalid
The error message is: ('EOF in multi-line statement', (568, 0))
ERROR: An unexpected error occurred while tokenizing input
The following traceback may be corrupted or invalid
The error message is: ('EOF in multi-line statement', (568, 0))
ERROR: An unexpected error occurred while tokenizing input
The following traceback may be corrupted or invalid
The error message is: ('EOF in multi-line statement', (568, 0))
---
TypeError Traceback (most recent call last)
/Users/laserson/Desktop/ipython console in module()
/Library/Frameworks/Python.framework/Versions/4.3.0/lib/python2.5/site-packages/matplotlib/pyplot.pyc
in draw()
348 def draw():
349 'redraw the current figure'
-- 350 get_current_fig_manager().canvas.draw()
351
352 @docstring.copy_dedent(Figure.savefig)
/Library/Frameworks/Python.framework/Versions/4.3.0/lib/python2.5/site-packages/matplotlib/backends/backend_tkagg.pyc
in draw(self)
213
214 def draw(self):
-- 215 FigureCanvasAgg.draw(self)
216 tkagg.blit(self._tkphoto, self.renderer._renderer, colormode=2)
217 self._master.update_idletasks()
/Library/Frameworks/Python.framework/Versions/4.3.0/lib/python2.5/site-packages/matplotlib/backends/backend_agg.pyc
in draw(self)
376
377 self.renderer = self.get_renderer()
-- 378 self.figure.draw(self.renderer)
379
380 def get_renderer(self):
/Library/Frameworks/Python.framework/Versions/4.3.0/lib/python2.5/site-packages/matplotlib/artist.pyc
in draw_wrapper(artist, renderer, *kl)
53 def draw_wrapper(artist, renderer, *kl):
54 before(artist, renderer)
--- 55 draw(artist, renderer, *kl)
56 after(artist, renderer)
57
/Library/Frameworks/Python.framework/Versions/4.3.0/lib/python2.5/site-packages/matplotlib/figure.pyc
in draw(self, renderer)
770
771 # render the axes
-- 772 for a in self.axes: a.draw(renderer)
773
774 # render the figure text
/Library/Frameworks/Python.framework/Versions/4.3.0/lib/python2.5/site-packages/matplotlib/artist.pyc
in draw_wrapper(artist, renderer, *kl)
53 def draw_wrapper(artist, renderer, *kl):
54 before(artist, renderer)
--- 55 draw(artist, renderer, *kl)
56 after(artist, renderer)
57
/Library/Frameworks/Python.framework/Versions/4.3.0/lib/python2.5/site-packages/matplotlib/axes.pyc
in draw(self, renderer, inframe)
1743
1744 for zorder, i, a in dsu:
- 1745 a.draw(renderer)
1746
1747 renderer.close_group('axes')
/Library/Frameworks/Python.framework/Versions/4.3.0/lib/python2.5/site-packages/matplotlib/artist.pyc
in draw_wrapper(artist, renderer, *kl)
53 def draw_wrapper(artist, renderer, *kl):
54 before(artist, renderer)
--- 55 draw(artist, renderer, *kl)
56 after(artist, renderer)
57
/Library/Frameworks/Python.framework/Versions/4.3.0/lib/python2.5/site-packages/matplotlib/patches.pyc
in draw(self, renderer)
353
354 path = self.get_path()
-- 355 transform = self.get_transform()
356 tpath = transform.transform_path_non_affine(path)
357 affine = transform.get_affine()
/Users/laserson/Desktop/testMyPatch.py in get_transform(self)
22 box = [[self.x, self.y1],
23 [self.x, self.y2]]
--- 24 box = self.axes.transData.transform(box)
25
26 # Get the width as a fraction of the axes width
/Library/Frameworks/Python.framework/Versions/4.3.0/lib/python2.5/site-packages/matplotlib/transforms.pyc
in transform(self, points)
1893 def transform(self, points):
1894 return self._b.transform(
- 1895 self._a.transform(points))
1896 transform.__doc__ = Transform.transform.__doc__
1897
/Library/Frameworks/Python.framework/Versions/4.3.0/lib/python2.5/site-packages/matplotlib/transforms.pyc
in transform(self, points)
1721 x_points =
Re: [Matplotlib-users] Subplots, multiple bar3d plots + titling
Try below instead of Axes3D. Obviously, 131 is the geometry
parameter for subplot command. You don't need to add ax to fig
since Axes3D do that by itself.
from matplotlib.axes import subplot_class_factory
Subplot3D = subplot_class_factory(Axes3D)
ax = Subplot3D(fig, 131)
This will show you the title also. However, the 3d axes will occupy
smaller area than the area of the subplot.
Regards,
-JJ
On Mon, Sep 28, 2009 at 6:23 PM, qu...@gmx.at wrote:
Greetings,
I would like to plot to make a figure with 3 subplots
of the form (221) to (223):
- each subplot should show a bar3d plot of a matrix
- each subplot should have it's own title
The problems:
a) I don't see (nor did i find something) how i can
use subplots combined with bar3d (from the mpl_toolkits.mplot3d)
package.
b) I don't manage to give the 3d bar plot a title. In the attached
code you will see that a title is set, but it does not show
up in the figure
Could someone please help me out with these problems?
Thanks,
q
-
The code for the basic plot of the matrix:
from mpl_toolkits.mplot3d import Axes3D
import matplotlib.pyplot as plt
from matplotlib.ticker import FixedFormatter, LinearLocator, FixedLocator
from numpy import *
psi=1/sqrt(2)*array([1, 0, 0, 1])
rho=outer(psi,psi)
fig = plt.figure()
ax = Axes3D(fig)
elements = (len(rho) * len(rho))
xpos, ypos = meshgrid(array(range(len(rho)))+0.25,
array(range(len(rho)))+0.25)
xpos = xpos.flatten()
ypos = ypos.flatten()
zpos = zeros(elements)
dx = 0.5 * ones_like(zpos)
dy = dx.copy()
dz = absolute(rho.flatten())
ax.set_title('absolute')
ax.bar3d(xpos, ypos, zpos, dx, dy, dz, color='#F8F800')
plt.show()
--
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Re: [Matplotlib-users] trailing space in text string stripped, making it impossible to right-pad my text
Jae-Joon Lee wrote:
Hmm, I'm afraid that this only works if you use preview mode. I
haven't tested, but I guess it will fail without it. Check if
rcParams[text.latex.preview]==True.
Hm, I don't know about mpl's mathtext mode, but I'm actually always
working in usetex mode. Unfortunately, even so,
text.latex.preview does not exist in rcParams for me. However,... :
I think the following behaviour is definitely
buggy! Please try the following one at a time, in ion() mode (or just see
sequence of png's produced). None of these succeeds in getting the desired
alignment.
from matplotlib import rc
figure(1)
clf()
plot([0,0],[1,1])
rc('text', usetex=True)
text(xlim()[1],.96,r'$r^2$~~~\mbox{}',horizontalalignment='right')
savefig('t10.png')
rc('text', usetex=False)
show()
savefig('t20.png')
text(xlim()[1],.97,r'$r^2$~~~\mbox{}',horizontalalignment='right')
savefig('t30.png')
rc('text', usetex=True)
show()
savefig('t40.png')
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Sent from the matplotlib - users mailing list archive at Nabble.com.
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Re: [Matplotlib-users] python script
felix meyenhofer wrote: The package is installed. In the interpreter the 'import matplotlib' does not throw an error. On the other hand I tried to use matplotlib in a python script and here the very same command provokes the following error message: how are you running that script? I supect you are getting a different python. try: $ python TheNameOfTheScript that should get you the same python as you get typig python If you run the script directly: $ ./TheNameOfTheScript it will use the #! line at the top to tell it where to find python. If that line says #!/usr/bin/python you'll probably get a different one. the usual convention is: #!/usr/bin/env python which should get you the same one that you get when you start python at the command line. a few things to try to test all this: $ which python $ python -c import sys; print sys.path $ python -c import sys; print sys.executable putting import sys and print sys.path or print sys.executable at the top of your troublesome script. HTH, -Chris Traceback (most recent call last): File ./account3.py, line 13, in module import matplotlib ImportError: No module named matplotlib I would be greatful for any help/explanaiton. Cheers, Felix $ uname -aDarwin mac-screening-1 9.8.0 Darwin Kernel Version 9.8.0: Wed Jul 15 16:55:01 PDT 2009; root:xnu-1228.15.4~1/RELEASE_I386 i386 $ python Python 2.5.4 (r254:67917, Dec 23 2008, 14:57:27) [GCC 4.0.1 (Apple Computer, Inc. build 5363)] on darwin $ python -c 'import matplotlib; print matplotlib.__version__, matplotlib.__file__' 0.99.0 /Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/ site-packages/matplotlib/__init__.pyc The Package was downloaded from the link: http://sourceforge.net/projects/matplotlib/files/matplotlib/matplotlib-0.99.1/matplotlib-0.99.1.1-py2.5-macosx10.5.dmg/download -- Come build with us! The BlackBerryreg; 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#45;12, 2009. Register now#33; http://p.sf.net/sfu/devconf ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users -- Christopher Barker, Ph.D. Oceanographer Emergency Response Division NOAA/NOS/ORR(206) 526-6959 voice 7600 Sand Point Way NE (206) 526-6329 fax Seattle, WA 98115 (206) 526-6317 main reception chris.bar...@noaa.gov -- Come build with us! The BlackBerryreg; 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#45;12, 2009. Register now#33; http://p.sf.net/sfu/devconf ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
[Matplotlib-users] new interface functions for LinearSegmentedColormap
After experimenting with colormaps for a while, I was able to make both discrete (piecewise-constant) and continuous (piecewise-linear) colormaps work. Although colormaps can be created directly using LinearSegmentedColormap from the matplotlib.colors package, this is a tedious and error-prone process. So, I compiled a set of three interface functions. (I wrote two of these myself, and got one from the SciPy website). The two functions that I wrote permit one to define a discrete (piecewise-constant) and continuous (piecewise-linear) colormap directly via a sequence of colors and a set of thresholds specified as lists. Each color may be specified either via an RGB tuple or via an English color name known to webcolors.name_to_rgb. I'm going to submit all of this to the matplotlib developers forums in the hopes of getting it incorporated into matplotlib. -- View this message in context: http://www.nabble.com/new-interface-functions-for-LinearSegmentedColormap-tp25657187p25657187.html Sent from the matplotlib - users mailing list archive at Nabble.com. -- Come build with us! The BlackBerryreg; 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#45;12, 2009. Register now#33; http://p.sf.net/sfu/devconf ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
