matplotlib-users Mailing List for matplotlib

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:
0.0000, 0.000250,0.000050,0.000750,
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

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

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
-- 
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Sent from the matplotlib - users mailing list archive at Nabble.com.

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
---
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

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

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