00001 #define H1K0S_cxx 00002 #include "H1K0S.h" 00003 #include "TH2.h" 00004 #include "TStyle.h" 00005 #include "TCanvas.h" 00006 00007 void H1K0S::Loop() 00008 { 00009 // In a ROOT session, you can do: 00010 // Root > .L H1K0S.C 00011 // Root > H1K0S t 00012 // Root > t.GetEntry(12); // Fill t data members with entry number 12 00013 // Root > t.Show(); // Show values of entry 12 00014 // Root > t.Show(16); // Read and show values of entry 16 00015 // Root > t.Loop(); // Loop on all entries 00016 // 00017 00018 // This is the loop skeleton where: 00019 // jentry is the global entry number in the chain 00020 // ientry is the entry number in the current Tree 00021 // Note that the argument to GetEntry must be: 00022 // jentry for TChain::GetEntry 00023 // ientry for TTree::GetEntry and TBranch::GetEntry 00024 // 00025 // To read only selected branches, Insert statements like: 00026 // METHOD1: 00027 // fChain->SetBranchStatus("*",0); // disable all branches 00028 // fChain->SetBranchStatus("branchname",1); // activate branchname 00029 // METHOD2: replace line 00030 // fChain->GetEntry(jentry); //read all branches 00031 //by b_branchname->GetEntry(ientry); //read only this branch 00032 if (fChain == 0) return; 00033 00034 Int_t nentries = Int_t(fChain->GetEntriesFast()); 00035 00036 Int_t nbytes = 0, nb = 0; 00037 for (Int_t jentry=0; jentry<nentries;jentry++) { 00038 Int_t ientry = LoadTree(jentry); 00039 if (ientry < 0) break; 00040 nb = fChain->GetEntry(jentry); nbytes += nb; 00041 // if (Cut(ientry) < 0) continue; 00042 } 00043 }