How to do 2-variable (n-variable?) histograms?

[Mark A Ohrenschall <Mark.A.Ohrenschall@xxxxxxxx>]

Hi,

I'm using the frequency_histogram go script to produce two separate
histograms, but I'd like to combine them so that I can see the
distributions of my two variables at the same time. Is there any way to
do this?

Thanks,

Mark