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jueugste |
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#define rootNtupleClass_cxx
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#include "rootNtupleClass.h"
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#include <TH2.h>
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#include <TStyle.h>
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#include <TCanvas.h>
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void rootNtupleClass::Loop()
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{
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// In a ROOT session, you can do:
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// Root > .L rootNtupleClass.C
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// Root > rootNtupleClass t
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// Root > t.GetEntry(12); // Fill t data members with entry number 12
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// Root > t.Show(); // Show values of entry 12
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// Root > t.Show(16); // Read and show values of entry 16
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// Root > t.Loop(); // Loop on all entries
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//
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// This is the loop skeleton where:
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// jentry is the global entry number in the chain
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// ientry is the entry number in the current Tree
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// Note that the argument to GetEntry must be:
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// jentry for TChain::GetEntry
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// ientry for TTree::GetEntry and TBranch::GetEntry
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//
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// To read only selected branches, Insert statements like:
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// METHOD1:
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// fChain->SetBranchStatus("*",0); // disable all branches
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// fChain->SetBranchStatus("branchname",1); // activate branchname
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// METHOD2: replace line
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// fChain->GetEntry(jentry); //read all branches
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//by b_branchname->GetEntry(ientry); //read only this branch
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if (fChain == 0) return;
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Long64_t nentries = fChain->GetEntriesFast();
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Long64_t nbytes = 0, nb = 0;
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for (Long64_t jentry=0; jentry<nentries;jentry++) {
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Long64_t ientry = LoadTree(jentry);
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if (ientry < 0) break;
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nb = fChain->GetEntry(jentry); nbytes += nb;
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// if (Cut(ientry) < 0) continue;
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}
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}
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