matplotlib. How do I switch between subplots, rather than replotting them from scratch?

Question

I create a figure and fill it with a couple of subplots.

As new data arrives, I'd like to draw it on a given subplot.

How do I switch between subplots so that I don't have to create new subplot objects each time?

Example:

from matplotlib.pyplot import figure,

figure()
subplot(2,1,1)
subplot(2,1,2)

# now go back and plot something on subplot 1 ...?

Answer 1

Assign subplot to a variable:

fig = matplotlib.pyplot.figure()

plt1 = fig.add_subplot(2,1,1)
plt2 = fig.add_subplot(2,1,2)

Then you can draw lines and points and whatever else you want with references to plt1 and plt2

Take a look at the reference for everything you can do with the plot.