00001 #include <iostream>
00002 #include <cmath>
00003 #include <string>
00004
00005 #include "TChain.h"
00006 #include "TFile.h"
00007 #include "TString.h"
00008
00009 void merge_ntuples(){
00010
00011 TString energy[13]={"715695","715692","715699","715702","715747","715748","715750","715752","715754","715756","715757","715758","715759"};
00012
00013 TChain *chain = new TChain("Pions");
00014
00015 for (int i=0; i<13; i++){
00016 TString filename ="/home1/karyotak/MyData/rootfiles/DSTPions"+energy[i]+"EM.root";
00017 cout << i << " " << filename << endl;
00018 chain->Add(filename);
00019 }
00020 chain->Draw("Ebeam");
00021 TFile *f1=new TFile("DSTPionsAllEM.root","recreate");
00022 f1->cd();
00023 chain->Write();
00024 }
