double countTotal(process &process) { // Create temporary histogram TH1D* tmp = new TH1D("tmp", "tmp", 30, 0, 1000); double Total = 0; process.GetChain()->Draw("Njet>>tmp", "XS*5000/Nevt", "goff"); Total = int(tmp->Integral()); delete tmp; process.SetNevt_nosel(Total); return Total; }