Dear All,
I am trying to make a plot of dsigma/dInvMass, however I am getting error even though I just used same algorithm to plot dsigma/deta.
Part Code:
TH1F * InHist = new TH1F("InvMass","Histogram of InvMass", 100, -10, 10);
TH1F *Inv = 0;
{
eta = -log(tan(theta/2));
InHist->Fill(InvMass);
}
Float_t binwidth = InHist->GetBinWidth(1); // plot of dsigma/dInvariant Mass
Float_t norm = sigma/(nevents*binwidth);
dInv = (TH1F*)InHist->Clone("dInv");
dInv->SetTitle("gen_dSigma_Mass/InvMass");
dInv->Scale(norm);
dInv->Draw();
Error
error: use of undeclared identifier 'dInv'dInv = (TH1F*)InHist->Clone("dInv");
^
error: use of undeclared identifier 'dInv' dInv->SetTitle("gen_dSigma_Mass/InvMass");
^
error: use of undeclared identifier 'dInv'dInv->Scale(norm);
^
error: use of undeclared identifier 'dInv'dInv->Draw();
Please help thank you.