You will need to update the axes’ dataLim, then subsequently update the axes’ viewLim based on the dataLim. The approrpiate methods are axes.relim()
and ax.autoscale_view()
method.
Your example then looks like:
import random
import matplotlib.pyplot as pyplot
pyplot.ion()
x = range(10)
y = lambda m: [m*random.random() for i in range(10)]
pLine, = pyplot.plot(x, y(1))
for i in range(10):
pLine.set_ydata(y(i+1))
ax = pyplot.gca()
# recompute the ax.dataLim
ax.relim()
# update ax.viewLim using the new dataLim
ax.autoscale_view()
pyplot.draw()