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"""
=============================
Pause and resume an animation
=============================
This example showcases:
- using the Animation.pause() method to pause an animation.
- using the Animation.resume() method to resume an animation.
.. note::
This example exercises the interactive capabilities of Matplotlib, and this
will not appear in the static documentation. Please run this code on your
machine to see the interactivity.
You can copy and paste individual parts, or download the entire example
using the link at the bottom of the page.
Output generated via `matplotlib.animation.Animation.to_jshtml`.
"""
import matplotlib.pyplot as plt
import numpy as np
import matplotlib.animation as animation
class PauseAnimation:
def __init__(self):
fig, ax = plt.subplots()
ax.set_title('Click to pause/resume the animation')
x = np.linspace(-0.1, 0.1, 1000)
# Start with a normal distribution
self.n0 = (1.0 / ((4 * np.pi * 2e-4 * 0.1) ** 0.5)
* np.exp(-x ** 2 / (4 * 2e-4 * 0.1)))
self.p, = ax.plot(x, self.n0)
self.animation = animation.FuncAnimation(
fig, self.update, frames=200, interval=50, blit=True)
self.paused = False
fig.canvas.mpl_connect('button_press_event', self.toggle_pause)
def toggle_pause(self, *args, **kwargs):
if self.paused:
self.animation.resume()
else:
self.animation.pause()
self.paused = not self.paused
def update(self, i):
self.n0 += i / 100 % 5
self.p.set_ydata(self.n0 % 20)
return (self.p,)
pa = PauseAnimation()
plt.show()
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