Hi Emily,
You have two possibilities:
- make a TH1 histogram hw with your weights and do myhisto.Multiply(hw)
- loop explicitly on the bins, multiplying the bins in the range by a weight
for (int i=from;i<to;i++) {
double c = myhisto.GetBinContent(i)*weight;
myhisto.SetBinContent(c);
}
Rene Brun
Emily Nurse wrote:
>
> Hi,
> Is it possible to weight a histogram in certain bins only?
> I don't want to do this when filling the histogram.
> I extract the histogram from a root file then re-draw itand I'd like to
> make a correction to some bins only.
> Thanks,
> Emily.
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