Easiest way to change a histogram from one type to another?

I have some root files into which I have written TH2C type histograms, to save disk space, as I have many of them that I’m generating as part of a monte carlo.

I need to do some manipulations to each histogram as part of my analysis, and this includes rebinning, which will take the bin contents out of the capacity of a char.

What’s the easiest way to turn a TH2C that I have loaded into memory into a TH2I (or any other TH2 type?) I was thinking that adding the TH2C histogram to a TH2I histogram might work, but I would appreciate any other comments on the issue.

Yes use the Add function. We do not have copy constructors supporting all possible cases.