How to change text of y-axes on a matplotlib generated picture

Question

The page is "http://matplotlib.sourceforge.net/examples/pylab_examples/histogram_demo_extended.html"

Let's look at the y-axis, the numbers there do not make any sense, could we change it to something else that is meaningful?

Answer 1

You can use yticks(), see this example.

Answer 2

Except the cumulative distribution plot, and the last one, the rest of the y-axes data show normalized histogram values with normed=1 keyword set (i.e., the are underneath the histogram equals to 1 as in the definition of a probability density function (PDF))