Just from morbid curiosity, I installed networkx to see if I could see what
is going on. And the answer to your original question is that no,
matplotlib doesn't have problems with multiple wx panels; I do this all the
time.
Basically what is going on is that pylab is being used inside of networkx
to issue the plotting commands. That's a bad idea in general, because of
just this type of situation. Without getting in there and trying to fix
networkx, I can at least make your script work by inserting this line:
def my_plot(figure):
figure.clear()
plt.figure(figure.number) <-------------------------------
G = nx.star_graph(15)
axes = figure.add_subplot(1,1,1)
nx.draw_networkx(G, ax=axes)
to make sure that before nx.draw_networkx is invoked, the correct figure is
current. That's a kludge, but it does work. The proper solution is to
modify networkx to use the api's properly. In particular, the glaring one
is right at the top of
site-packages/networkx/drawing/nx_pylab.py, line 119; that
cf = pylab.gcf()
should at least be
if ax is None:
cf = pylab.gcf()
else:
cf = ax.get_figure()
[I think]
The above should be reported to the networkx authors.
On Wed, Jul 11, 2012 at 1:02 PM, Daniel Hyams <dhy...@gmail.com> wrote:
> To get rid of the networkx dependency, I just replaced my_plot() with this:
>
> def my_plot(figure):
> figure.clear()
> axes = figure.add_subplot(1,1,1)
> axes.plot([0,1,2],[2,3,4])
>
> and also added "self.panel2.update_display()" in the constructor for
> MyFrame, and everything worked fine. Could it be networkx caching a
> reference to a figure or axes that is really the problem? Can you post the
> full stack trace instead of just the last line?
>
>
>
> On Wed, Jul 11, 2012 at 12:45 PM, Joshua Koehler <jjkoehl...@gmail.com>wrote:
>
>> Hi all,
>>
>> I am currently trying to have two panels each with their own figure
>> instance so they can have separate plots.
>>
>> I can successfully update a plot if there is only one panel. As soon as I
>> add a second panel, I get the following error when I try to update (replot)
>> a plot (Showing last message only):
>>
>> File
>> "/Library/Frameworks/Python.framework/Versions/7.3/lib/python2.7/site-packages/matplotlib/axes.py",
>> line 1374, in _sci
>> "Argument must be an image, collection, or ContourSet in this Axes")
>> ValueError: Argument must be an image, collection, or ContourSet in this
>> Axes
>>
>> I looked online first and one site suggested it was because I was using
>> matplotlib.Figure instead of pylab.Figure. I switched and the problem still
>> occurs. I was curious to see if this problem had to do with how I set up my
>> program, not with matplotlib, so I wrote a little test program. The exact
>> same problem occurs. I have attached the test program. To see that it does
>> work with just one panel comment out lines 39, 41, and 49. When put back
>> in, I get the above error message.
>>
>> Any suggestions as to how to fix this?
>>
>> Thanks!
>>
>> Josh
>>
>>
>>
>>
>>
>>
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>
>
> --
> Daniel Hyams
> dhy...@gmail.com
>
--
Daniel Hyams
dhy...@gmail.com
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