Substract two histograms in different root file

ROOT
1

Hi,

I’m trying to subtract two histogram which have the same name in two different root file. Is there any idea?

Thanks.

2

do:

TFile *f1 = TFile::Open("file1.root"); TH1 *h1 = (TH1*)f1->Get"Name of hist"); TFile *f2 = TFile::Open("file2.root"); TH1 *h2 = (TH1*)f2->Get"Name of hist"); h1->Add(h2,-1);

Rene