In [1]:
%matplotlib inline
import numpy as np
import matplotlib.pyplot as plt
from matplotlib import animation
from IPython.display import HTML
In [2]:
dn = np.random.choice([-1,1], size=100)
swalk = np.cumsum(dn)
# First set up the figure, the axis, and the plot element we want to animate
fig, ax = plt.subplots()
ax.set_xlim(( 0, 100))
ax.set_ylim((-10, 10))
line, = ax.plot([], [], lw=2)
plt.close()
# initialization function: plot the background of each frame
def init():
line.set_data([], [])
return (line,)
# animation function. This is called sequentially
def animate(i):
x = np.arange(i)
y = swalk[:i]
line.set_data(x, y)
return (line,)
# equivalent to rcParams['animation.html'] = 'html5'
plt.rcParams['animation.html'] = 'html5'
# call the animator. blit=True means only re-draw the parts that have changed.
anim = animation.FuncAnimation(fig, animate, init_func=init,
frames=100, interval=50, blit=True)
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anim
Out[3]:
In [4]:
anim.save('demoanimation.gif', writer='imagemagick',fps=1000/50);