Hi Root support members,
I tried to calculate the efficiency from weighted merged histograms.
But the result seems wrong.
I did like
TH1D *pass1; TH1D *pass2; TH1D *total1; TH1D *total2; //read all histograms from root file pass2->Scale(scale2); //scale pass2 histo. total2->Scale(scale2); //scale total2 histo. pass1->Add(pass2); total1->Add(total2); TGraphAsymmErrros *eff = new TGraphAsymmErrors; eff->Divide(pass1, total1);
In this case, does divide function return correct efficiency and errors ?