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Nov 25, 2017
+18 −21
Merged

Simplify the pyplot animation demo. #9852

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39 changes: 18 additions & 21 deletions examples/animation/animation_demo.py
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Original file line number Diff line number Diff line change
@@ -1,31 +1,28 @@
"""
==============
Animation Demo
==============
================
pyplot animation
================

Pyplot animation example.
Generating an animation by calling `~.pyplot.pause` between plotting commands.

The method shown here is only for very simple, low-performance
use. For more demanding applications, look at the animation
module and the examples that use it.
The method shown here is only suitable for simple, low-performance use. For
more demanding applications, look at the :mod:`animation` module and the
examples that use it.

Note that calling `time.sleep` instead of `~.pyplot.pause` would *not* work.
"""

import matplotlib.pyplot as plt
import numpy as np

x = np.arange(6)
y = np.arange(5)
z = x * y[:, np.newaxis]
np.random.seed(19680801)
data = np.random.random((50, 50, 50))

for i in range(5):
if i == 0:
p = plt.imshow(z)
fig = plt.gcf()
plt.clim() # clamp the color limits
plt.title("Boring slide show")
else:
z = z + 2
p.set_data(z)
fig, ax = plt.subplots()

print("step", i)
plt.pause(0.5)
for i in range(len(data)):
ax.cla()
ax.imshow(data[i])
ax.set_title("frame {}".format(i))
# Note that using time.sleep does *not* work here!
plt.pause(0.1)