Oops; my sentence should have read "is *not* derived from an artist".
On Sun, Nov 13, 2011 at 1:24 PM, Benjamin Root <ben.r...@ou.edu> wrote:
>
>
> On Sunday, November 13, 2011, Daniel Hyams <dhy...@gmail.com> wrote:
>> This looks like a bug in matplotlib to me; I get the same thing.
>>
>> The basic issue is that QuadContourSet is derived from an artist, and
>> so does not have all of the artist methods; the animation framework
>> depends on the things that it is animating being artists.
>>
>> The following monkey patch fixes it in the example script (obviously,
>> it does not fix the underlying problem; for QuadContourSet to be
>> usable in this context, it needs to obey the artist interface).
>> Hopefully, it will be enough to get you up and running. Just add the
>> four lines between contour call and the appending of the output of
>> contour() into the list "ims", and also put an "import types" at the
>> top.
>>
>>
>> #!/usr/bin/env python
>> """
>> An animated image
>> """
>> import numpy as np
>> import matplotlib.pyplot as plt
>> import matplotlib.animation as animation
>> import types
>> fig = plt.figure()
>> def f(x, y):
>> return np.sin(x) + np.cos(y)
>> x = np.linspace(0, 2 * np.pi, 120)
>> y = np.linspace(0, 2 * np.pi, 100).reshape(-1, 1)
>> # ims is a list of lists, each row is a list of artists to draw in the
>> # current frame; here we are just animating one artist, the image, in
>> # each frame
>> ims = []
>> for i in range(60):
>> x += np.pi / 15.
>> y += np.pi / 20.
>> im = plt.contour(f(x, y))
>> def setvisible(self,vis):
>> for c in self.collections: c.set_visible(vis)
>> im.set_visible = types.MethodType(setvisible,im,None)
>> im.axes = plt.gca()
>> ims.append([im])
>> ani = animation.ArtistAnimation(fig, ims, interval=50, blit=True,
>> repeat_delay=1000)
>> ani.save('dynamic_images.mp4')
>>
>> plt.show()
>>
>
> Technically speaking, it is derived from ScalarMappable, not Artist. It is
> counter-intuitive, though.
>
> Ben Root
--
Daniel Hyams
dhy...@gmail.com
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