Use a histogram as a weight for other histograms

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Hi everybody,

I have a histogram, containing a ratio of data and MC pileup distributions , which is needed to reweight several other histograms. How can this weighting be done? Should I make an array of numbers from this histogram somehow and use it in a Fill() function or are there other methods?

Thanks in advance

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See “Operations on histograms” in the TH1 Class Reference.

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Thanks for the reply,
Yep,I looked at the references, but it seems these operations are not what is needed for using the histogram as a weight. As far as I’ve understood, I need to extract values of Data/MC PU ratio from my hist to use them in a Fill function. I’ve tried to GetBinContent from each bin and to write these contents to a TBranch (since it can be used as a weight), but this doesn’t work.
So the question remains…

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