I am sorry for this very simple question.
I would like drawing a TH1F with the OptStat, having the integral (or the entries number) in the corresponding x-range of the histogram, the mean value and the rms.
I used the option:
but I see the Entries number in the OptStat that is indipendent by the TH1F x-range.
How can I see the number of entries according to the x-range?
Thank you for any kind of help