Potential Memory leak?

Newbie
,
1

I’m trying to create a 1D histogram but getting this error “Replacing existing TH1: Energy (Potential memory leak)”. Some ideas would be highly appreciated.

GENIAnalysis.C (1.9 KB)

ROOT Version:6.24
Platform:_ Not Provided
Compiler:_ Not Provided

2

You need:

   // ...
   TH1D *h = new TH1D("Energy", "Final Energy; Protons; Frequency", 50, 0., 2.);
   for (Long64_t jentry = 0; jentry < nentries; jentry++) {
   // ...
		      if (pdgf[pdgindex] == 2212) {
		      	  h->Fill(Your_Particle_Final_Energy_Value); // maybe (Ef[pdgindex])
		      }
   // ...
   }
   h->Draw();
   // ...

BTW. If this is the same tree as in the “InteractionsII.root” file, instead of:
for (Long64_t pdgindex=0; pdgindex<28;pdgindex++)
you need:
for (Int_t pdgindex = 0; pdgindex < nf; pdgindex++) // if you use the "pdgf[nf]/I " branch inside
or:
for (Int_t pdgindex = 0; pdgindex < ni; pdgindex++) // if you use the "pdgi[ni]/I " branch inside

1 Like
4

Thanks Wile! It worked. I really appreciate it.
Hany

Screenshot from 2022-11-01 10-40-43