Hi experts.
I got a problem when i make a new tree from existed ntp.
I take two leaf qc5 and fmax from 3 each Am_test.ntp, Ba_test.ntp, Cd_test.ntp.
And I also make a branch for qc5 , fmax.
So here is the problem. I want to make a new branch for energy.
The energy is just qc5*calibration factor.
But it doesn’t show the correct histogram.
How can i solve this?
void makeTree()
{
TChain * chain1 = new TChain("ntp");
TChain * chain2 = new TChain("ntp");
TChain * chain3 = new TChain("ntp");
chain1->Add("data/Am_test.ntp.root.00000");
chain2->Add("data/Ba_test.ntp.root.00000");
chain3->Add("data/Cd_test.ntp.root.00000");
float qc5, fmax;
float energy = qc5 * 4.2807603e-3;
chain1->GetLeaf("pmt11", "qc5")->SetAddress(&qc5);
chain2->GetLeaf("pmt11", "qc5")->SetAddress(&qc5);
chain3->GetLeaf("pmt11", "qc5")->SetAddress(&qc5);
chain1->GetLeaf("pmt11", "fmax")->SetAddress(&fmax);
chain2->GetLeaf("pmt11", "fmax")->SetAddress(&fmax);
chain3->GetLeaf("pmt11", "fmax")->SetAddress(&fmax);
chain1->GetLeaf("pmt11", "energy")->SetAddress(&energy);
chain2->GetLeaf("pmt11", "energy")->SetAddress(&energy);
chain3->GetLeaf("pmt11", "energy")->SetAddress(&energy);
TFile fout("data/tree.root", "recreate");
TTree * tree1 = new TTree("t1", "t1");
TTree * tree2 = new TTree("t2", "t2");
TTree * tree3 = new TTree("t3", "t3");
tree1->Branch("qc5" , &qc5 );
tree1->Branch("fmax" , &fmax);
tree1->Branch("energy", &energy);
tree2->Branch("qc5" , &qc5 );
tree2->Branch("fmax" , &fmax);
tree2->Branch("energy", &energy);
tree3->Branch("qc5" , &qc5 );
tree3->Branch("fmax" , &fmax);
tree3->Branch("energy", &energy);
int nent1 = chain1->GetEntries();
for(int i = 0; i < nent1; i++){
chain1->GetEntry(i);
tree1->Fill();
}
int nent2 = chain2->GetEntries();
for(int i = 0; i < nent2; i++){
chain2->GetEntry(i);
tree2->Fill();
}
tree3->Fill();
}
tree1->Write();
tree2->Write();
tree3->Write();
fout.Close();
}
This is what i use the code.
int nent3 = chain3->GetEntries();
for(int i = 0; i < nent3; i++){
chain3->GetEntry(i);
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