Is there a parameter in matplotlib/pandas to have the Y axis of a histogram as percentage?

Question

I would like to compare two histograms by having the Y axis show the percentage of each column from the overall dataset size instead of an absolute value. Is that possible?

Answer 1

Looks like @CarstenKönig found the right way:

df.hist(bins=20, weights=np.ones_like(df[df.columns[0]]) * 100. / len(df))