| 1 |
#define rootNtupleClass_cxx
|
| 2 |
#include "rootNtupleClass.h"
|
| 3 |
#include <TH2.h>
|
| 4 |
#include <TStyle.h>
|
| 5 |
#include <TCanvas.h>
|
| 6 |
|
| 7 |
void rootNtupleClass::Loop()
|
| 8 |
{
|
| 9 |
// In a ROOT session, you can do:
|
| 10 |
// Root > .L rootNtupleClass.C
|
| 11 |
// Root > rootNtupleClass t
|
| 12 |
// Root > t.GetEntry(12); // Fill t data members with entry number 12
|
| 13 |
// Root > t.Show(); // Show values of entry 12
|
| 14 |
// Root > t.Show(16); // Read and show values of entry 16
|
| 15 |
// Root > t.Loop(); // Loop on all entries
|
| 16 |
//
|
| 17 |
|
| 18 |
// This is the loop skeleton where:
|
| 19 |
// jentry is the global entry number in the chain
|
| 20 |
// ientry is the entry number in the current Tree
|
| 21 |
// Note that the argument to GetEntry must be:
|
| 22 |
// jentry for TChain::GetEntry
|
| 23 |
// ientry for TTree::GetEntry and TBranch::GetEntry
|
| 24 |
//
|
| 25 |
// To read only selected branches, Insert statements like:
|
| 26 |
// METHOD1:
|
| 27 |
// fChain->SetBranchStatus("*",0); // disable all branches
|
| 28 |
// fChain->SetBranchStatus("branchname",1); // activate branchname
|
| 29 |
// METHOD2: replace line
|
| 30 |
// fChain->GetEntry(jentry); //read all branches
|
| 31 |
//by b_branchname->GetEntry(ientry); //read only this branch
|
| 32 |
if (fChain == 0) return;
|
| 33 |
|
| 34 |
Long64_t nentries = fChain->GetEntriesFast();
|
| 35 |
|
| 36 |
Long64_t nbytes = 0, nb = 0;
|
| 37 |
for (Long64_t jentry=0; jentry<nentries;jentry++) {
|
| 38 |
Long64_t ientry = LoadTree(jentry);
|
| 39 |
if (ientry < 0) break;
|
| 40 |
nb = fChain->GetEntry(jentry); nbytes += nb;
|
| 41 |
// if (Cut(ientry) < 0) continue;
|
| 42 |
}
|
| 43 |
}
|
