Well, in this case, you have to -create a new histogram with the right limits in X_t - loop on the original histogram bins - getting the bin content - computing the new bin in the new histogram - call SetBinContent(newbin,bincontent) You must be careful with bin edge effects. A reason to start from the original data (Tree or..) instead of the above procedure. Rene Brun Anufriev Sergey Valentinovich wrote: > > But, in fact E_t is the XAxis. And I need XAxis will be X_t. I need not > to normalize my histogram. > > > Hi Sergey, > > > > Having TH1D* h, do > > h->Scale(2/sqrt(s)); > > > > see also TH1::DrawNormalized > > > > Rene Brun > > > > Anufriev Sergey Valentinovich wrote: > > > > > > Dear ROOTers! > > > > > > I have the next problem: I can draw TH1D which shows dependense CROSS > > > SECTION (E_transeverse), but in fact I need histogram CROSS > > > SECTION(X_transeverse), where X_transeverse=2*E_transeverse/SQRT(s) (just > > > one can say X_t=f(E_t)). Question is: how can I get it? > > > > > > Thank you in advance, Sergey. > >
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