Hi,

Given normed=True, stacked=True, hist will first normalize each histogram to 1, then stack them all. While not technically incorrect, I can't think of a situation in which one would use this.

I think it would be more useful for the function to stack the histograms, then normalize such that the sum of all of the histograms is one.

I can implement this when I get time, I'm mostly wondering if anyone sees a good reason to leave it as is.