[Matplotlib-users] Matplotlib 0.99.3 win32 py2.6 crashes on import
I just installed matplotlib-0.99.3.win32-py2.6.exe on this Win2000 PC. When I try: from matplotlib import pyplot as plt it crashes Python with an apparent NULL-pointer reference. If I run python -v then it crashes just after: # c:\python26\lib\site-packages\matplotlib\transforms.pyc matches c:\python26\li b\site-packages\matplotlib\transforms.py import matplotlib.transforms # precompiled from c:\python26\lib\site-packages\ma tplotlib\transforms.pyc matplotlib-0.99.1.win32-py2.6.exe worked fine on this PC. Regards, Craig McQueen -- ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Matplotlib 0.99.3 win32 py2.6 crashes on import
On 5/31/2010 1:53 AM, Craig McQueen wrote: I just installed matplotlib-0.99.3.win32-py2.6.exe on this Win2000 PC. When I try: from matplotlib import pyplot as plt it crashes Python with an apparent NULL-pointer reference. If I run python -v then it crashes just after: # c:\python26\lib\site-packages\matplotlib\transforms.pyc matches c:\python26\li b\site-packages\matplotlib\transforms.py import matplotlib.transforms # precompiled from c:\python26\lib\site-packages\ma tplotlib\transforms.pyc matplotlib-0.99.1.win32-py2.6.exe worked fine on this PC. Regards, Craig McQueen I can not reproduce the crash in a Virtual Machine with Windows 2000 SP4, Python 2.6.5, numpy 1.4.1, and matplotlib 0.99.3. Exactly which versions are you using, and how did you install Python (for all users?). What is your CPU? matplotlib-0.99.3.win32-py2.6 was built against numpy 1.4.1, libpng 1.4.2 and zlib 1.2.5, while matplotlib-0.99.1.win32-py2.6 was built against numpy 1.3.0, libpng 1.2.3x, and zlib 1.2.3. Christoph -- ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
[Matplotlib-users] setting scientific number notation on colorbar
Hi Guys,
I'm breaking my head how to use scientific numbering on color bar:
I use the following code to plot data from multiple files, would be great if
someone could direct me, becuase the numbers I have are 0.0013 et. and what
ever I do, the number just go over each other:
for i in xrange(len(data)):
x,z,som=data[i][x],data[i][z],data[i]['ch2o']
som=som*MwSOM
som=som*1000
x=N.unique(x)
z=N.unique(z)
p_w=N.unique(som)
fig = plt.figure(len(data)+1+i)
ax1 = fig.add_subplot(111)
som=resize(som,(z.size,x.size))
v=N.arange(1.15,1.18,0.002)
CS=contourf(x,z,som,cmap=cm.pink_r)
cb=colorbar(CS, orientation='horizontal', shrink=1.0,aspect=33)
ax1.set_title(SOM +titles[i])
savefig('Fig'+str(i)+'.png')
Thanks in advance !
--
Oz Nahum
Graduate Student
Zentrum für Angewandte Geologie
Universität Tübingen
---
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it isn't hard to do
Nothing to kill or die for
And no religion too
Imagine all the people
Living life in peace
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Re: [Matplotlib-users] Matplotlib 0.99.3 win32 py2.6 crashes on import
Christoph Gohlke wrote: On 5/31/2010 1:53 AM, Craig McQueen wrote: I just installed matplotlib-0.99.3.win32-py2.6.exe on this Win2000 PC. When I try: from matplotlib import pyplot as plt it crashes Python with an apparent NULL-pointer reference. If I run python -v then it crashes just after: # c:\python26\lib\site-packages\matplotlib\transforms.pyc matches c:\python26\li b\site-packages\matplotlib\transforms.py import matplotlib.transforms # precompiled from c:\python26\lib\site-packages\ma tplotlib\transforms.pyc matplotlib-0.99.1.win32-py2.6.exe worked fine on this PC. Regards, Craig McQueen I can not reproduce the crash in a Virtual Machine with Windows 2000 SP4, Python 2.6.5, numpy 1.4.1, and matplotlib 0.99.3. Exactly which versions are you using, and how did you install Python (for all users?). What is your CPU? matplotlib-0.99.3.win32-py2.6 was built against numpy 1.4.1, libpng 1.4.2 and zlib 1.2.5, while matplotlib-0.99.1.win32-py2.6 was built against numpy 1.3.0, libpng 1.2.3x, and zlib 1.2.3. Christoph Ah--installing numpy 1.4.1 fixed the issue. I had numpy 1.3.0 installed before that. Thanks for such a helpful response. I wasn't aware that matplotlib is built against a particular version of numpy (not quite sure what that means either, unless numpy provides a direct C API as well as the Python API; please excuse my ignorance). (To answer your questions in case that's still useful somehow... I'm using Windows 2000 SP4, Python 2.6.5, on a Pentium 4 PC. I installed Python for all users.) Thanks and regards, Craig McQueen -- ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] setting scientific number notation on colorbar
Hi, I wanted to be more clear: the numbers on my figure's color bar range from 0 to 1.7, but mpl writes the following numbers: 0., 0.000250,0.50,0.000750, etc. This is totally not somthing I can use, it looks horrible. I'm also attaching the image ... -- Oz Nahum Graduate Student Zentrum für Angewandte Geologie Universität Tübingen --- Imagine there's no countries it isn't hard to do Nothing to kill or die for And no religion too Imagine all the people Living life in peace attachment: Fig0.png-- ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] setting scientific number notation on colorbar
found a solution after 2 hours ... colorbar(ax=ax1, orientation='horizontal',format='%.3f') now, I need to know how to set up limits for all the images which are exactly the same limits. So far I'm failing with the use of boundaries Would be happy to know -- Oz Nahum Graduate Student Zentrum für Angewandte Geologie Universität Tübingen --- Imagine there's no countries it isn't hard to do Nothing to kill or die for And no religion too Imagine all the people Living life in peace -- ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] setting scientific number notation on colorbar
Oz, Some plotting functions like pcolor and imshow have keyword args for vmin/vmax where you can explicitly set the min and maximum values for the colorscale. There are some more complicated things you can do with the colormap that are more generic to all plotting functions as well, but I would see if using vmin and vmax does the trick for you. Ben Root On Mon, May 31, 2010 at 7:25 PM, Oz Nahum nahu...@gmail.com wrote: found a solution after 2 hours ... colorbar(ax=ax1, orientation='horizontal',format='%.3f') now, I need to know how to set up limits for all the images which are exactly the same limits. So far I'm failing with the use of boundaries Would be happy to know -- Oz Nahum Graduate Student Zentrum für Angewandte Geologie Universität Tübingen --- Imagine there's no countries it isn't hard to do Nothing to kill or die for And no religion too Imagine all the people Living life in peace -- ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users -- ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] setting scientific number notation on colorbar
Hi Thanks for the answer, actually, I always use show and plot, I have no clue how to use the functions you suggested ... I'll look into it. Do you have an idea where I can find a description of the keyword format '%.3f' is nice, but still not scientific format... is this like Fortran? On Mon, May 31, 2010 at 5:41 PM, Benjamin Root ben.r...@ou.edu wrote: Oz, Some plotting functions like pcolor and imshow have keyword args for vmin/vmax where you can explicitly set the min and maximum values for the colorscale. There are some more complicated things you can do with the colormap that are more generic to all plotting functions as well, but I would see if using vmin and vmax does the trick for you. Ben Root On Mon, May 31, 2010 at 7:25 PM, Oz Nahum nahu...@gmail.com wrote: found a solution after 2 hours ... colorbar(ax=ax1, orientation='horizontal',format='%.3f') now, I need to know how to set up limits for all the images which are exactly the same limits. So far I'm failing with the use of boundaries Would be happy to know -- Oz Nahum Graduate Student Zentrum für Angewandte Geologie Universität Tübingen --- Imagine there's no countries it isn't hard to do Nothing to kill or die for And no religion too Imagine all the people Living life in peace -- ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users -- Oz Nahum Graduate Student Zentrum für Angewandte Geologie Universität Tübingen --- Imagine there's no countries it isn't hard to do Nothing to kill or die for And no religion too Imagine all the people Living life in peace -- ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] setting scientific number notation on colorbar
Hi Thanks for the answer, actually, I always use show and plot, I have no clue how to use the functions you suggested ... I'll look into it. Do you have an idea where I can find a description of the keyword format '%.3f' is nice, but still not scientific format... you can use '%.3e' for scientific format. Cheers, Andre is this like Fortran? On Mon, May 31, 2010 at 5:41 PM, Benjamin Root ben.r...@ou.edu wrote: Oz, Some plotting functions like pcolor and imshow have keyword args for vmin/vmax where you can explicitly set the min and maximum values for the colorscale. There are some more complicated things you can do with the colormap that are more generic to all plotting functions as well, but I would see if using vmin and vmax does the trick for you. Ben Root On Mon, May 31, 2010 at 7:25 PM, Oz Nahum nahu...@gmail.com wrote: found a solution after 2 hours ... colorbar(ax=ax1, orientation='horizontal',format='%.3f') now, I need to know how to set up limits for all the images which are exactly the same limits. So far I'm failing with the use of boundaries Would be happy to know -- Oz Nahum Graduate Student Zentrum für Angewandte Geologie Universität Tübingen --- Imagine there's no countries it isn't hard to do Nothing to kill or die for And no religion too Imagine all the people Living life in peace -- ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users -- Oz Nahum Graduate Student Zentrum für Angewandte Geologie Universität Tübingen --- Imagine there's no countries it isn't hard to do Nothing to kill or die for And no religion too Imagine all the people Living life in peace -- ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users -- ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Matplotlib 0.99.3 win32 py2.6 crashes on import
On 5/31/2010 4:53 PM, Craig McQueen wrote: Christoph Gohlke wrote: On 5/31/2010 1:53 AM, Craig McQueen wrote: I just installed matplotlib-0.99.3.win32-py2.6.exe on this Win2000 PC. When I try: from matplotlib import pyplot as plt it crashes Python with an apparent NULL-pointer reference. If I run python -v then it crashes just after: # c:\python26\lib\site-packages\matplotlib\transforms.pyc matches c:\python26\li b\site-packages\matplotlib\transforms.py import matplotlib.transforms # precompiled from c:\python26\lib\site-packages\ma tplotlib\transforms.pyc matplotlib-0.99.1.win32-py2.6.exe worked fine on this PC. Regards, Craig McQueen I can not reproduce the crash in a Virtual Machine with Windows 2000 SP4, Python 2.6.5, numpy 1.4.1, and matplotlib 0.99.3. Exactly which versions are you using, and how did you install Python (for all users?). What is your CPU? matplotlib-0.99.3.win32-py2.6 was built against numpy 1.4.1, libpng 1.4.2 and zlib 1.2.5, while matplotlib-0.99.1.win32-py2.6 was built against numpy 1.3.0, libpng 1.2.3x, and zlib 1.2.3. Christoph Ah--installing numpy 1.4.1 fixed the issue. I had numpy 1.3.0 installed before that. Thanks for such a helpful response. I wasn't aware that matplotlib is built against a particular version of numpy (not quite sure what that means either, unless numpy provides a direct C API as well as the Python API; please excuse my ignorance). (To answer your questions in case that's still useful somehow... I'm using Windows 2000 SP4, Python 2.6.5, on a Pentium 4 PC. I installed Python for all users.) Thanks and regards, Craig McQueen Yes, numpy has a C API, which is used by MPL. I can confirm the crashes with numpy 1.3. John: I rebuilt the 32 bit binaries for Python 2.5 and 2.6 against numpy 1.3.0. They do also work with numpy 1.4.1. Please consider uploading these binaries to the SF site. I also noticced that the eggs on the SF download site are corrupted, showing only 1.6 KB. The updated files are at http://www.lfd.uci.edu/~gohlke/pythonlibs/#matplotlib. Thanks. -- Christoph -- ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] setting scientific number notation on colorbar
hi andre, thanks for your reply, do you know where I can find more documentation about this ? Thanks, On Mon, May 31, 2010 at 5:55 PM, Andre Walker-Loud walksl...@gmail.comwrote: Hi Thanks for the answer, actually, I always use show and plot, I have no clue how to use the functions you suggested ... I'll look into it. Do you have an idea where I can find a description of the keyword format '%.3f' is nice, but still not scientific format... you can use '%.3e' for scientific format. Cheers, Andre is this like Fortran? On Mon, May 31, 2010 at 5:41 PM, Benjamin Root ben.r...@ou.edu wrote: Oz, Some plotting functions like pcolor and imshow have keyword args for vmin/vmax where you can explicitly set the min and maximum values for the colorscale. There are some more complicated things you can do with the colormap that are more generic to all plotting functions as well, but I would see if using vmin and vmax does the trick for you. Ben Root On Mon, May 31, 2010 at 7:25 PM, Oz Nahum nahu...@gmail.com wrote: found a solution after 2 hours ... colorbar(ax=ax1, orientation='horizontal',format='%.3f') now, I need to know how to set up limits for all the images which are exactly the same limits. So far I'm failing with the use of boundaries Would be happy to know -- Oz Nahum Graduate Student Zentrum für Angewandte Geologie Universität Tübingen --- Imagine there's no countries it isn't hard to do Nothing to kill or die for And no religion too Imagine all the people Living life in peace -- ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users -- Oz Nahum Graduate Student Zentrum für Angewandte Geologie Universität Tübingen --- Imagine there's no countries it isn't hard to do Nothing to kill or die for And no religion too Imagine all the people Living life in peace -- ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users -- Oz Nahum Graduate Student Zentrum für Angewandte Geologie Universität Tübingen --- Imagine there's no countries it isn't hard to do Nothing to kill or die for And no religion too Imagine all the people Living life in peace -- ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] setting scientific number notation on colorbar
Hi Oz, Sorry, I am not familiar with what you are trying to do with your plots. Everything I have learned is from trial and error, the gallery page http://matplotlib.sourceforge.net/gallery.html and the user manual http://matplotlib.sourceforge.net/contents.html Good luck, Andre On May 31, 2010, at 8:56 PM, Oz Nahum wrote: hi andre, thanks for your reply, do you know where I can find more documentation about this ? Thanks, On Mon, May 31, 2010 at 5:55 PM, Andre Walker-Loud walksl...@gmail.com wrote: Hi Thanks for the answer, actually, I always use show and plot, I have no clue how to use the functions you suggested ... I'll look into it. Do you have an idea where I can find a description of the keyword format '%.3f' is nice, but still not scientific format... you can use '%.3e' for scientific format. Cheers, Andre is this like Fortran? On Mon, May 31, 2010 at 5:41 PM, Benjamin Root ben.r...@ou.edu wrote: Oz, Some plotting functions like pcolor and imshow have keyword args for vmin/vmax where you can explicitly set the min and maximum values for the colorscale. There are some more complicated things you can do with the colormap that are more generic to all plotting functions as well, but I would see if using vmin and vmax does the trick for you. Ben Root On Mon, May 31, 2010 at 7:25 PM, Oz Nahum nahu...@gmail.com wrote: found a solution after 2 hours ... colorbar(ax=ax1, orientation='horizontal',format='%.3f') now, I need to know how to set up limits for all the images which are exactly the same limits. So far I'm failing with the use of boundaries Would be happy to know -- Oz Nahum Graduate Student Zentrum für Angewandte Geologie Universität Tübingen --- Imagine there's no countries it isn't hard to do Nothing to kill or die for And no religion too Imagine all the people Living life in peace -- ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users -- Oz Nahum Graduate Student Zentrum für Angewandte Geologie Universität Tübingen --- Imagine there's no countries it isn't hard to do Nothing to kill or die for And no religion too Imagine all the people Living life in peace -- ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users -- Oz Nahum Graduate Student Zentrum für Angewandte Geologie Universität Tübingen --- Imagine there's no countries it isn't hard to do Nothing to kill or die for And no religion too Imagine all the people Living life in peace -- ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
[Matplotlib-users] accessing colorbar() list of values
Hi, I open another thread because I think this is not related. I have figured out how to create scientific notation in the color bar. However, by default Python creates really ugly values for printing: 1.165E+00, 1.167E+00... etc. I figure that they are stored somewhere in a list. I could do : cb=colorbar(ax=ax1, orientation='horizontal',format='%.e') and then with: cb.ax.get_xmajorticklabels i get: bound method Axes.get_xmajorticklabels of matplotlib.axes.Axes object at 0x5716210 But do I actually modify this list I have no clue... Would be happy to know if somebody knows -- Oz Nahum Graduate Student Zentrum für Angewandte Geologie Universität Tübingen --- Imagine there's no countries it isn't hard to do Nothing to kill or die for And no religion too Imagine all the people Living life in peace -- ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] accessing colorbar() list of values
Yeah, I don't think that is what you want. I believe the 'ax' you are referencing there is the figure axes. How do you want the numbers to appear? Ben Root On Mon, May 31, 2010 at 8:27 PM, Oz Nahum nahu...@gmail.com wrote: Hi, I open another thread because I think this is not related. I have figured out how to create scientific notation in the color bar. However, by default Python creates really ugly values for printing: 1.165E+00, 1.167E+00... etc. I figure that they are stored somewhere in a list. I could do : cb=colorbar(ax=ax1, orientation='horizontal',format='%.e') and then with: cb.ax.get_xmajorticklabels i get: bound method Axes.get_xmajorticklabels of matplotlib.axes.Axes object at 0x5716210 But do I actually modify this list I have no clue... Would be happy to know if somebody knows -- Oz Nahum Graduate Student Zentrum für Angewandte Geologie Universität Tübingen --- Imagine there's no countries it isn't hard to do Nothing to kill or die for And no religion too Imagine all the people Living life in peace -- ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users -- ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] setting scientific number notation on colorbar
On Mon, May 31, 2010 at 7:51 PM, Oz Nahum nahu...@gmail.com wrote: Hi Thanks for the answer, actually, I always use show and plot, I have no clue how to use the functions you suggested ... I'll look into it. Do you have an idea where I can find a description of the keyword format '%.3f' is nice, but still not scientific format... is this like Fortran? I believe so (I am not too familiar with fortran, but the ideas are similar in many languages like C's sprintf. You can do '%.3g' to pretty print the float numbers (in a sense), and '%.3e' to always do scientific notation. Ben Root -- ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
[Matplotlib-users] imshow, imsave to PIL image conversion
I have a small problem how to convert an image from matplotlib to PIL right now doing somthing like this: -- from scipy import * from pylab import * from PIL import Image a = arange(16384).reshape(128,128) imsave( test.png, a, cmap=cm.summer,vmin=0,vmax=16383) b = Image.open(test.png ) -- so I have a 128x128 array, get a 128x128 size png by making use of a colormap and get a 128x128 size PIL image. But so far I could figure out a way to do this directly without writing a temporary png and reading it again, which is quite slow. My important point here is to keep the the pixel resolution. I would be glad about some help Regards Hans -- View this message in context: http://old.nabble.com/imshow%2C-imsave-to-PIL-image-conversion-tp28736246p28736246.html Sent from the matplotlib - users mailing list archive at Nabble.com. -- ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Matplotlib 0.99.3 win32 py2.6 crashes on import
On Mon, May 31, 2010 at 7:56 PM, Christoph Gohlke cgoh...@uci.edu wrote: John: I rebuilt the 32 bit binaries for Python 2.5 and 2.6 against numpy 1.3.0. They do also work with numpy 1.4.1. Please consider uploading these binaries to the SF site. I also noticced that the eggs on the SF download site are corrupted, showing only 1.6 KB. The updated files are at http://www.lfd.uci.edu/~gohlke/pythonlibs/#matplotlib. Thanks. Hey Christoph -- I just updated the win32 binaries again. Thanks for the rebuild. The sf upload page is extremely fragile and flaky, so I'm not surprised a corrupted binary got uploaded. I made sure the uploads completed this time -- hopefully they are now good but take a look. JDH -- ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Matplotlib 0.99.3 win32 py2.6 crashes on import
On 5/31/2010 7:45 PM, John Hunter wrote: On Mon, May 31, 2010 at 7:56 PM, Christoph Gohlkecgoh...@uci.edu wrote: John: I rebuilt the 32 bit binaries for Python 2.5 and 2.6 against numpy 1.3.0. They do also work with numpy 1.4.1. Please consider uploading these binaries to the SF site. I also noticced that the eggs on the SF download site are corrupted, showing only 1.6 KB. The updated files are at http://www.lfd.uci.edu/~gohlke/pythonlibs/#matplotlib. Thanks. Hey Christoph -- I just updated the win32 binaries again. Thanks for the rebuild. The sf upload page is extremely fragile and flaky, so I'm not surprised a corrupted binary got uploaded. I made sure the uploads completed this time -- hopefully they are now good but take a look. looks good to me. -- ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] imshow, imsave to PIL image conversion
On 31 May 2010 19:49, rugspin piet_par...@web.de wrote: I have a small problem how to convert an image from matplotlib to PIL right now doing somthing like this: -- from scipy import * from pylab import * from PIL import Image a = arange(16384).reshape(128,128) imsave( test.png, a, cmap=cm.summer,vmin=0,vmax=16383) b = Image.open(test.png ) -- The Image.fromarray function should do what you want. For example, import numpy as np # note: use of from foo import * import Image # is discouraged where possible a = np.arange(128)[None,:] * np.ones(128)[:,None] b = Image.fromarray(a) c = np.asarray(b) np.all(c == a) - True I hope that helps, Angus. -- AJC McMorland Post-doctoral research fellow Neurobiology, University of Pittsburgh -- ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] imshow, imsave to PIL image conversion
On 31 May 2010 23:17, Angus McMorland amcm...@gmail.com wrote: On 31 May 2010 19:49, rugspin piet_par...@web.de wrote: I have a small problem how to convert an image from matplotlib to PIL right now doing somthing like this: -- from scipy import * from pylab import * from PIL import Image a = arange(16384).reshape(128,128) imsave( test.png, a, cmap=cm.summer,vmin=0,vmax=16383) b = Image.open(test.png ) -- The Image.fromarray function should do what you want. For example, import numpy as np # note: use of from foo import * import Image # is discouraged where possible a = np.arange(128)[None,:] * np.ones(128)[:,None] Sorry - I was playing around with a few iterations of this line, and didn't provide the most useful one. Your example: a = np.arange(128**2).reshape(128,128) should also work fine. b = Image.fromarray(a) c = np.asarray(b) np.all(c == a) - True I hope that helps, Angus. -- AJC McMorland Post-doctoral research fellow Neurobiology, University of Pittsburgh -- ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
