Dividing TH1F bin by a number

ROOT
#1

Dear all,
I have this problem:
I have a TH1F object: the x-axis contains 100 bin in the range 0-10.
I have to divide all the bin from 0 to 1 by a number, from 1 to 2 by another one number, etc.
Is there a simple way to perform this task?
thank you,
Marco

#2

Nobody can help me?

#3

Hi,

I think you can do this very easily with few lines (maybe even 3) of code:

double a[] = { c1, c2, c3,.....};
for (int i = 1; i < h1->GetNbinsX(); ++i) 
  h1->SetBinContent(i , h1->GetBinContent( i) / a [ int(i /10) ] );

If needed , you might want also to scale the errors
Cheers,
Lorenzo

#4

Ciao Lorenzo,
thank you very much, I’ll try this method.