Hi,
I have taken the blit example and modified it such that it runs on my mac.
The function is called blit_ex.py. It works well when I paste the code in
ipython, but it doesn't when I do "run blit_ex.py" from ipython.
I am using EPD Py25 4.1.30001_beta1 and Mac OS 10.5.
The error message is:
In [1]: run blit_ex.py
---------------------------------------------------------------------------
AssertionError Traceback (most recent call last)
/Users/pierre/Desktop/blit_ex.py in <module>()
24 canvas.restore_region(background)
25 line.set_ydata(np.sin(x+i/10.))
---> 26 ax.draw_artist(line)
27 canvas.blit(ax.bbox)
28
/Library/Frameworks/Python.framework/Versions/4.1.30001/lib/python2.5/site-packages/matplotlib-0.98.3.0001-py2.5-macosx-10.3-fat.egg/matplotlib/axes.pyc
in draw_artist(self, a)
1532 data (axis ticks, labels, etc are not updated)
1533 """
-> 1534 assert self._cachedRenderer is not None
1535 a.draw(self._cachedRenderer)
1536
AssertionError:
WARNING: Failure executing file: <blit_ex.py>
And the code is
import matplotlib.pyplot as plt
import numpy as np
import time
plt.figure(1)
plt.clf()
ax = plt.subplot(111)
canvas = ax.figure.canvas
# for profiling
tstart = time.time()
# create the initial line
x = np.linspace(-3, 3, 1000)
line, = plt.plot(x, np.sin(x), animated=True)
# save the clean slate background -- everything but the animated line
# is drawn and saved in the pixel buffer background
background = canvas.copy_from_bbox(ax.bbox)
for i in range(100):
canvas.restore_region(background)
line.set_ydata(np.sin(x+i/10.))
ax.draw_artist(line)
canvas.blit(ax.bbox)
Thanks!
Pierre
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