On Wed, 22 Oct 2014 12:38:02 +0200, Peter Otten wrote:
> Peter Pearson wrote:
[snip]
>> def callback(event):
>> global n, first
>> fig = plt.figure(2)
>> fig.clear()
>> plt.plot([0,1],[0,n])
>> n += 1 # (Pretending something changes from one plot to the next.)
>> if first:
>> first = False
>> plt.show()
>> else:
>> fig.canvas.draw()
>>
>> Can someone tell me the right way?
[snip]
> def callback(event):
> global n, fig2
>
> if fig2 is None:
> fig2 = plt.figure(2)
>
> fig2.clear()
> fig2.gca().plot([0, .5, 1], [0, 1/n, 1])
> fig2.show()
Thank you for pointing out two useful things:
* I like fig2.gca().plot better than plt.plot, since it makes it
clear that I'm talking about fig2 and not some other part of the
vast and inscrutable plt kingdom.
* fig2.show is different from plt.show, and in fact this solves my
problem exactly, since fig2.show returns immediately.
By the way, I will dispense with your "if fig2 is None" test. In real
life, I say something like fig2 = plt.figure("Packet Sizes"). If a
figure named "Packet Sizes" doesn't exist, plt.figure creates it,
otherwise it returns a pointer to the existing figure -- *and* it titles
the figure's window with "Packet Sizes" rather than "2".
[snip]
> As I'm not an expert for matplotlib you might also post your question on the
> matplotlib mailing list.
Sound advice. Next time. Thanks again.
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