matplotlib-users Mailing List for matplotlib

Michael Droettboom wrote:
> I think what's going on there is a syntax error in the clabel docstring
> that is truncating it. I fixed this in SVN. I think there's a cron job
> running, so this should update in due time.
> 
> In general, the documentation is built directly from the docstrings in
> SVN so they should correspond, but let us know if you find anything else
> like this.
> 
Thanks. I think I would have found this, but unfortunately I couldn't
get the docs to build. Right now, the stix_fonts_demo.py is failing on
my box:
(0, '$\\mathcircled{123} \\mathrm{\\mathcircled{123}}
\\mathbf{\\mathcircled{123}}$')
(1, '$\\mathsf{Sans \\Omega} \\mathrm{\\mathsf{Sans \\Omega}}
\\mathbf{\\mathsf{Sans \\Omega}}$')
(2, '$\\mathtt{Monospace}$')
(3, '$\\mathcal{CALLIGRAPHIC}$')
(4, '$\\mathbb{Blackboard \\pi}$')
(5, '$\\mathrm{\\mathbb{Blackboard \\pi}}$')
(6, '$\\mathbf{\\mathbb{Blackboard \\pi}}$')
(7, '$\\mathfrak{Fraktur} \\mathbf{\\mathfrak{Fraktur}}$')
(8, '$\\mathscr{Script}$')
(9, 'Direct Unicode: $\\u23ce \\mathrm{\\ue0f2 \\U0001d538}$')
python: CXX/cxx_extensions.cxx:1128: virtual
Py::PythonExtensionBase::~PythonExtensionBase(): Assertion `ob_refcnt ==
0' failed.
[1] 1709 abort (core dumped) python
Here's the backtrace (though without debugging symbols):
#0 0x00007fa5c042c3c5 in raise () from /lib/libc.so.6
#1 0x00007fa5c042d73e in abort () from /lib/libc.so.6
#2 0x00007fa5c0425b1f in __assert_fail () from /lib/libc.so.6
#3 0x00007fa5b8f37e3e in Py::PythonExtensionBase::~PythonExtensionBase ()
 from
/home/rmay/.local/lib64/python2.5/site-packages/matplotlib/ft2font.so
#4 0x00007fa5b8f30f43 in Py::PythonExtension<FT2Font>::~PythonExtension ()
 from
/home/rmay/.local/lib64/python2.5/site-packages/matplotlib/ft2font.so
#5 0x00007fa5b8f20a35 in FT2Font::FT2Font ()
 from
/home/rmay/.local/lib64/python2.5/site-packages/matplotlib/ft2font.so
#6 0x00007fa5b8f20bd1 in ft2font_module::new_ft2font ()
 from
/home/rmay/.local/lib64/python2.5/site-packages/matplotlib/ft2font.so
#7 0x00007fa5b8f2dc5b in
Py::ExtensionModule<ft2font_module>::invoke_method_varargs ()
 from
/home/rmay/.local/lib64/python2.5/site-packages/matplotlib/ft2font.so
#8 0x00007fa5b8f34b62 in method_varargs_call_handler ()
 from
/home/rmay/.local/lib64/python2.5/site-packages/matplotlib/ft2font.so
I'm not sure if you care about the failed assertion. It could be a
reference leak, maybe not. Obviously, being an assertion, it only does
this when debugging is enabled (though I can't seem to see where my
system package on Gentoo turns this off).
Ryan
-- 
Ryan May
Graduate Research Assistant
School of Meteorology
University of Oklahoma

The problem was exposed by running python -c "import pylab" from the
command shell.
 
A message box indicated that msvcp71.dll was missing.
 
I copied this file to my python25 folder and it fixed the problem. Note
- it didn't help to copy the missing file to the windows\system32 folder
or even to regsvr32 it.
 
Andre de Fortier Smit
 
 

I think what's going on there is a syntax error in the clabel docstring 
that is truncating it. I fixed this in SVN. I think there's a cron job 
running, so this should update in due time.
In general, the documentation is built directly from the docstrings in 
SVN so they should correspond, but let us know if you find anything else 
like this.
Mike
Ryan May wrote:
> John Hunter wrote:
> 
>> On Thu, Oct 23, 2008 at 10:51 AM, Ryan May <rm...@gm...> wrote:
>>
>> 
>>> I've done it for barbs and I'll see if I notice anything else as time
>>> allows. Obviously I'm biased towards certain functionality. :) I'm
>>> guessing you guys have to do regenerate the docs and push them somewhere
>>> before any of this becomes live.
>>>
>>> 
>> Yes, but it's pretty easy. To build and update from the docs dir, I just do
>>
>> 
>>> python make.py html sf
>>> 
>> I've pushed your changes out -- thanks!
>> 
>
> Related to the barbs non-updating issue, I just noticed that the
> pyplot.clabel docs online are woefully out of date while the docstring
> is actually quite nice. I just had someone come by asking a question
> about clabel that would have been in the docs had the online ones been
> up to date. Do we have some kind of problem with getting these docs to
> update when we build them? Is there something I can help with here?
>
> Ryan
>
> 
-- 
Michael Droettboom
Science Software Branch
Operations and Engineering Division
Space Telescope Science Institute
Operated by AURA for NASA

FYI
 
pylab fails to import on Windows Server 2008. I'm using the latest
installs of numpy, scipy and matplotlib.
 
>>> from pylab import *
Traceback (most recent call last):
 File "<interactive input>", line 1, in <module>
 File "C:\Python25\Lib\site-packages\pylab.py", line 1, in <module>
 from matplotlib.pylab import *
 File "C:\Python25\Lib\site-packages\matplotlib\pylab.py", line 206, in
<module>
 from matplotlib import mpl # pulls in most modules
 File "C:\Python25\Lib\site-packages\matplotlib\mpl.py", line 1, in
<module>
 from matplotlib import artist
 File "C:\Python25\Lib\site-packages\matplotlib\artist.py", line 4, in
<module>
 from transforms import Bbox, IdentityTransform, TransformedBbox,
TransformedPath
 File "C:\Python25\lib\site-packages\matplotlib\transforms.py", line
34, in <module>
 from matplotlib._path import affine_transform
ImportError: DLL load failed: The specified module could not be found.
 
 
Andre de Fortier Smit
 

John Hunter wrote:
> On Thu, Oct 23, 2008 at 10:51 AM, Ryan May <rm...@gm...> wrote:
> 
>> I've done it for barbs and I'll see if I notice anything else as time
>> allows. Obviously I'm biased towards certain functionality. :) I'm
>> guessing you guys have to do regenerate the docs and push them somewhere
>> before any of this becomes live.
>>
> 
> Yes, but it's pretty easy. To build and update from the docs dir, I just do
> 
>> python make.py html sf
> 
> I've pushed your changes out -- thanks!
Related to the barbs non-updating issue, I just noticed that the
pyplot.clabel docs online are woefully out of date while the docstring
is actually quite nice. I just had someone come by asking a question
about clabel that would have been in the docs had the online ones been
up to date. Do we have some kind of problem with getting these docs to
update when we build them? Is there something I can help with here?
Ryan
-- 
Ryan May
Graduate Research Assistant
School of Meteorology
University of Oklahoma

imshow doesn't handle logarithmic data. You'll want to use pcolor or 
pcolormesh instead.
As for the graininess, unfortunately, pcolor and pcolormesh don't 
support any kind of interpolation. (imshow does, but it can only draw 
uniform data).
Mike
John [H2O] wrote:
> Hello,
>
> I'm trying to get imshow to plot logarithmic data. I'm having some problems
> with the colorbar or data??
>
> Note, I plot the max_dat value on the bottom of the figure, but it does not
> seem to correspond with the values in the plot??? Any ideas? Also, does
> anyone have some recommendations on how to better smooth the values, i.e.
> make the plume less 'grainy'? Thanks!
>
> My code is here:
> http://numpy.pastebin.com/m4ae6331a
>
> Example output is here:
> http://picasaweb.google.com/washakie/Temp#5260746894103850338
>
> 
-- 
Michael Droettboom
Science Software Branch
Operations and Engineering Division
Space Telescope Science Institute
Operated by AURA for NASA

Hello,
I'm trying to get imshow to plot logarithmic data. I'm having some problems
with the colorbar or data??
Note, I plot the max_dat value on the bottom of the figure, but it does not
seem to correspond with the values in the plot??? Any ideas? Also, does
anyone have some recommendations on how to better smooth the values, i.e.
make the plume less 'grainy'? Thanks!
My code is here:
http://numpy.pastebin.com/m4ae6331a
Example output is here:
http://picasaweb.google.com/washakie/Temp#5260746894103850338
-- 
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On Fri, Oct 24, 2008 at 13:43, Angus McMorland <am...@gm...> wrote:
> 2008年10月24日 Lorenzo Isella <lor...@gm...>:
>> I am running Debian testing on my box. I had not used Python for about
>> a couple of weeks (during which I updated my system regularly) only to
>> find out that today I have a trouble if I try to import pylab. See
>> below what happens
> I'm guessing this is because you've recently upgraded to the latest
> testing version of mpl... and it's broken. If that's the case you need
> to upgrade to the unstable version (0.98.3-3) and all will work again.
Alternatively, you can download the version targetted for testing,
0.98.1-1+lenny3, from [1] (by hand, sorry).
[1] http://ftp.debian.org/debian/pool/main/m/matplotlib/
-- 
Sandro Tosi (aka morph, Morpheus, matrixhasu)
My website: http://matrixhasu.altervista.org/
Me at Debian: http://wiki.debian.org/SandroTosi

Perfect; that saved my day.
Many thanks
Lorenzo
2008年10月24日 Angus McMorland <am...@gm...>:
> 2008年10月24日 Lorenzo Isella <lor...@gm...>:
>> Dear All,
>> I am running Debian testing on my box. I had not used Python for about
>> a couple of weeks (during which I updated my system regularly) only to
>> find out that today I have a trouble if I try to import pylab. See
>> below what happens
>>
>> In [1]: import pylab as p
>> ---------------------------------------------------------------------------
>> ImportError Traceback (most recent call last)
>>
>> /home/iselllo/<ipython console> in <module>()
>>
>> /usr/lib/python2.5/site-packages/pylab.py in <module>()
>> ----> 1 from matplotlib.pylab import *
>> 2 import matplotlib.pylab
>> 3 __doc__ = matplotlib.pylab.__doc__
>>
>> /usr/lib/python2.5/site-packages/matplotlib/pylab.py in <module>()
>> 202 from numpy import ma
>> 203
>> --> 204 from matplotlib import mpl # pulls in most modules
>> 205
>> 206 from matplotlib.dates import date2num, num2date,\
>>
>> /usr/lib/python2.5/site-packages/matplotlib/mpl.py in <module>()
>> ----> 2 from matplotlib import axis
>> 3 from matplotlib import axes
>> 4 from matplotlib import cbook
>> 5 from matplotlib import collections
>> 6 from matplotlib import colors
>>
>> /usr/lib/python2.5/site-packages/matplotlib/axis.py in <module>()
>> 11 import matplotlib.patches as mpatches
>> 12 import matplotlib.scale as mscale
>> ---> 13 import matplotlib.text as mtext
>> 14 import matplotlib.ticker as mticker
>> 15 import matplotlib.transforms as mtransforms
>>
>> /usr/lib/python2.5/site-packages/matplotlib/text.py in <module>()
>> 17 from lines import Line2D
>> 18
>> ---> 19 import matplotlib.nxutils as nxutils
>> 20
>> 21 def _process_text_args(override, fontdict=None, **kwargs):
>>
>> ImportError: /usr/lib/python2.5/site-packages/matplotlib/nxutils.so:
>> undefined symbol: __gxx_personality_v0
>>
>> I have no idea of what is going on; I do not remember doing anything
>> funny with my Python installation.
>> Any help is really appreciated now, since without pylab many of my
>> codes are unusable.
>> Many thank in advance
>
> I'm guessing this is because you've recently upgraded to the latest
> testing version of mpl... and it's broken. If that's the case you need
> to upgrade to the unstable version (0.98.3-3) and all will work again.
>
> HTH,
>
> Angus.
>
>>
>> Lorenzo
>>
>> --
>> Free will does not consist in inverting the river flow, but in being
>> the fish that leaps upstream.
>>
>> -------------------------------------------------------------------------
>> This SF.Net email is sponsored by the Moblin Your Move Developer's challenge
>> Build the coolest Linux based applications with Moblin SDK & win great prizes
>> Grand prize is a trip for two to an Open Source event anywhere in the world
>> http://moblin-contest.org/redirect.php?banner_id=100&url=/
>> _______________________________________________
>> Matplotlib-users mailing list
>> Mat...@li...
>> https://lists.sourceforge.net/lists/listinfo/matplotlib-users
>>
>
>
>
> --
> AJC McMorland
> Post-doctoral research fellow
> Neurobiology, University of Pittsburgh
>
-- 
Free will does not consist in inverting the river flow, but in being
the fish that leaps upstream.

2008年10月24日 Lorenzo Isella <lor...@gm...>:
> Dear All,
> I am running Debian testing on my box. I had not used Python for about
> a couple of weeks (during which I updated my system regularly) only to
> find out that today I have a trouble if I try to import pylab. See
> below what happens
>
> In [1]: import pylab as p
> ---------------------------------------------------------------------------
> ImportError Traceback (most recent call last)
>
> /home/iselllo/<ipython console> in <module>()
>
> /usr/lib/python2.5/site-packages/pylab.py in <module>()
> ----> 1 from matplotlib.pylab import *
> 2 import matplotlib.pylab
> 3 __doc__ = matplotlib.pylab.__doc__
>
> /usr/lib/python2.5/site-packages/matplotlib/pylab.py in <module>()
> 202 from numpy import ma
> 203
> --> 204 from matplotlib import mpl # pulls in most modules
> 205
> 206 from matplotlib.dates import date2num, num2date,\
>
> /usr/lib/python2.5/site-packages/matplotlib/mpl.py in <module>()
> ----> 2 from matplotlib import axis
> 3 from matplotlib import axes
> 4 from matplotlib import cbook
> 5 from matplotlib import collections
> 6 from matplotlib import colors
>
> /usr/lib/python2.5/site-packages/matplotlib/axis.py in <module>()
> 11 import matplotlib.patches as mpatches
> 12 import matplotlib.scale as mscale
> ---> 13 import matplotlib.text as mtext
> 14 import matplotlib.ticker as mticker
> 15 import matplotlib.transforms as mtransforms
>
> /usr/lib/python2.5/site-packages/matplotlib/text.py in <module>()
> 17 from lines import Line2D
> 18
> ---> 19 import matplotlib.nxutils as nxutils
> 20
> 21 def _process_text_args(override, fontdict=None, **kwargs):
>
> ImportError: /usr/lib/python2.5/site-packages/matplotlib/nxutils.so:
> undefined symbol: __gxx_personality_v0
>
> I have no idea of what is going on; I do not remember doing anything
> funny with my Python installation.
> Any help is really appreciated now, since without pylab many of my
> codes are unusable.
> Many thank in advance
>
I'm guessing this is because you've recently upgraded to the latest
testing version of mpl... and it's broken. If that's the case you need
to upgrade to the unstable version (0.98.3-3) and all will work again.
HTH,
Angus.
> Lorenzo
>
> --
> Free will does not consist in inverting the river flow, but in being
> the fish that leaps upstream.
>
> -------------------------------------------------------------------------
> This SF.Net email is sponsored by the Moblin Your Move Developer's challenge
> Build the coolest Linux based applications with Moblin SDK & win great prizes
> Grand prize is a trip for two to an Open Source event anywhere in the world
> http://moblin-contest.org/redirect.php?banner_id=100&url=/
> _______________________________________________
> Matplotlib-users mailing list
> Mat...@li...
> https://lists.sourceforge.net/lists/listinfo/matplotlib-users
>
-- 
AJC McMorland
Post-doctoral research fellow
Neurobiology, University of Pittsburgh

Dear All,
I am running Debian testing on my box. I had not used Python for about
a couple of weeks (during which I updated my system regularly) only to
find out that today I have a trouble if I try to import pylab. See
below what happens
In [1]: import pylab as p
---------------------------------------------------------------------------
ImportError Traceback (most recent call last)
/home/iselllo/<ipython console> in <module>()
/usr/lib/python2.5/site-packages/pylab.py in <module>()
----> 1 from matplotlib.pylab import *
 2 import matplotlib.pylab
 3 __doc__ = matplotlib.pylab.__doc__
/usr/lib/python2.5/site-packages/matplotlib/pylab.py in <module>()
 202 from numpy import ma
 203
--> 204 from matplotlib import mpl # pulls in most modules
 205
 206 from matplotlib.dates import date2num, num2date,\
/usr/lib/python2.5/site-packages/matplotlib/mpl.py in <module>()
----> 2 from matplotlib import axis
 3 from matplotlib import axes
 4 from matplotlib import cbook
 5 from matplotlib import collections
 6 from matplotlib import colors
/usr/lib/python2.5/site-packages/matplotlib/axis.py in <module>()
 11 import matplotlib.patches as mpatches
 12 import matplotlib.scale as mscale
---> 13 import matplotlib.text as mtext
 14 import matplotlib.ticker as mticker
 15 import matplotlib.transforms as mtransforms
/usr/lib/python2.5/site-packages/matplotlib/text.py in <module>()
 17 from lines import Line2D
 18
---> 19 import matplotlib.nxutils as nxutils
 20
 21 def _process_text_args(override, fontdict=None, **kwargs):
ImportError: /usr/lib/python2.5/site-packages/matplotlib/nxutils.so:
undefined symbol: __gxx_personality_v0
I have no idea of what is going on; I do not remember doing anything
funny with my Python installation.
Any help is really appreciated now, since without pylab many of my
codes are unusable.
Many thank in advance
Lorenzo
-- 
Free will does not consist in inverting the river flow, but in being
the fish that leaps upstream.

I wasn't aware of those examples. I tried the first one and again it didn't
refresh. 
I was able to get things working by switching my backend to Tcl. Previously
I was using wxpython, and I think there was a problem in the installation.
efiring wrote:
> 
> joschu wrote:
>> My program runs through a loop and is supposed to re-plot the graph after
>> each step (which includes a pause of 1 second). I can't get the plot to
>> refresh. I wrote the following simple program which has the same problem.
>> I
>> tried both draw() nor f.canvas.draw() works. I'm running it from ipython
>> -pylab
> 
> Animation in mpl is a bit tricky. Have you checked out the examples in 
> the examples/animation subdirectory of the current version? See also 
> http://www.scipy.org/Cookbook/Matplotlib/Animations
> 
> Eric
>> 
>> A similar problem was encountered here:
>> http://www.nabble.com/Plotting-loop-refuses-to-update-display-on-OS-X-td19818020.html
>> but I still don't know what to do.
>> 
>> ### teststuff.py
>> 
>> import pylab
>> import time
>> 
>> def testRef():
>> f = pylab.figure()
>> ax = pylab.gca()
>> pylab.show()
>> for x in range(10):
>> ax.axhline(x)
>> time.sleep(1)
>> # pylab.draw()
>> f.canvas.draw()
>> 
>> testRef()
> 
> 
> -------------------------------------------------------------------------
> This SF.Net email is sponsored by the Moblin Your Move Developer's
> challenge
> Build the coolest Linux based applications with Moblin SDK & win great
> prizes
> Grand prize is a trip for two to an Open Source event anywhere in the
> world
> http://moblin-contest.org/redirect.php?banner_id=100&url=/
> _______________________________________________
> Matplotlib-users mailing list
> Mat...@li...
> https://lists.sourceforge.net/lists/listinfo/matplotlib-users
> 
> 
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