[Matplotlib-users] GUI neutral animation example doesn't work with WxAgg/Wx

[Tony S Yu <to...@MI...>]

The GUI neutral animation example from the SciPy cookbook doesn't seem  
to work for Wx or WxAgg backends. A plot window opens but nothing  
happens. It appears to be some weird problem with ion on wx.

For example, the following code will run and immediately close:
 >>> plt.ion()
 >>> plt.plot(x, y)
 >>> plt.show()
After removing plt.ion(), a plot window is opened and the program  
doesn't end until the window is closed (as expected).

If I use TkAgg or Qt4Agg (the only other GUI backends I have  
installed) the examples (above and below) work as expected.

-Tony

Full Example:
#~~~~
import matplotlib
matplotlib.use('WxAgg')
import matplotlib.pyplot as plt
import numpy as np

plt.ion()
x = np.arange(0, 2*np.pi, 0.01)
line, = plt.plot(x, np.sin(x))
for i in np.arange(1, 20):
     line.set_ydata(np.sin(x + i/10.0))
     plt.draw()
#~~~~

PS. This seems to work the same on both trunk and 0.98.3.