void pl1()
{
  gROOT->SetStyle("Plain");
  gStyle->SetTitle(0);


  char buf[256];

  TFile* f1 = new TFile("/data0/asircar/Slims/ZtautauNp0.root");
  TTree *t1=(TTree*)f1->Get("physics");
  TFile* f2 = new TFile("/data0/asircar/Slims/ZtautauNp1.root");
  TTree *t2=(TTree*)f2->Get("physics");
  TFile* f3 = new TFile("/data0/asircar/Slims/ZtautauNp2.root");
  TTree *t3=(TTree*)f3->Get("physics");
  TFile* f4 = new TFile("/data0/asircar/Slims/ZtautauNp3.root");
  TTree *t4=(TTree*)f4->Get("physics");
  TFile* f5 = new TFile("/data0/asircar/Slims/ZtautauNp4.root");
  TTree *t5=(TTree*)f5->Get("physics");
  TFile* f6 = new TFile("/data0/asircar/Slims/ZtautauNp5.root");
  TTree *t6=(TTree*)f6->Get("physics");

  cout<<"test"<<endl;
  TFile *f9 = new TFile("background.root" , "recreate");

 f9->Close();


   const int nvar = 9;

    //const


char*chvar[nvar]={"tau_seedCalo_EMRadius","tau_seedCalo_centFrac","tau_seedCalo_isolFrac","tau_seedCalo_trkAvgDist","tau_etOverPtLeadTrk","tau_massTrkSys","$
//char str[]="tau_seedCalo_EMRadius";

//string mac = chvar[ivar];



//for (int ivar = 0; ivar<nvar; ++ivar) {


  //  strcpy(buf,chvar[ivar]);
    //strcat(buf,"_1");
    //strcpy(buf,str);
    //TH1F* h1 =(TH1F*)t1->GetBranch("tau_seedCalo_EMRadius")->TBranchClone();
// strcpy(buf,str);
    //TH1F* h2 =(TH1F*)t2->GetBranch("tau_seedCalo_EMRadius")->TBranchClone();
 //strcpy(buf,str);

// TH1F* h3 =(TH1F*)t3->GetBranch("tau_seedCalo_EMRadius")->TBranchClone();
 //strcpy(buf,str);
   // TH1F* h4 =(TH1F*)t4->GetBranch("tau_seedCalo_EMRadius")->TBranchClone();
// strcpy(buf,str);
  //  TH1F* h5 =(TH1F*)t5->GetBranch("tau_seedCalo_EMRadius")->TBranchClone();
 //strcpy(buf,str);
 // TH1F* h6 =(TH1F*)t6->GetBranch("tau_seedCalo_EMRadius")->TBranchClone();




   for (int ivar = 0; ivar<nvar; ++ivar) {
   strcpy(buf,chvar[ivar]);
   strcat(buf,"");
   cout<<"test1"<<endl;
   TH1F* h1 =(TH1F*)t1->GetBranch(chvar[ivar])->Clone(buf);
   strcpy(buf,chvar[ivar]);
   strcat(buf,"");
   TH1F* h2 = (TH1F*)t2->GetBranch(chvar[ivar])->Clone(buf);
   strcpy(buf,chvar[ivar]);
   strcat(buf,"");
   TH1F* h3 = (TH1F*)t3->GetBranch(chvar[ivar])->Clone(buf);
   strcpy(buf,chvar[ivar]);
   strcat(buf,"");
   TH1F* h4 = (TH1F*)t4->GetBranch(chvar[ivar])->Clone(buf);
   strcpy(buf,chvar[ivar]);
   strcat(buf,"");
   TH1F* h5 = (TH1F*)t5->GetBranch(chvar[ivar])->Clone(buf);
   strcpy(buf,chvar[ivar]);
   strcat(buf,"");
   TH1F* h6 = (TH1F*)t6->GetBranch(chvar[ivar])->Clone(buf);



cout<<"test2"<<endl;

    //Normalization **********



 //    h1->Add(h1, h2,0.173553,0.497252);
//     h1->Add(h3, h1,0.9333333,1);
//     h1->Add(h1, h4,1,0.930676);


  //    h1->Add(h1, h2,0.116071429,0.578125);
//      h1->Add(h1, h3,1,0.568888889);
//      h1->Add(h1, h4,1,0.566724437);


     h1->Add(h1, h2,1,1);
     h1->Add(h1, h3,1,1);
     h1->Add(h1, h4,1,1);
     h1->Add(h1, h5,1,1);
     h1->Add(h1, h6,1,1);
      cout<<"test3"<<endl;

    //  h1->Add(h1, h7,1,1);
    // h1->Add(h1, h8,1,1);
   //  h1->Add(h1, h9,1,1);


        h1->SetLineColor(3);
         cout<<"test4"<<endl;



    sprintf(buf,"c%d",ivar+1);

    TCanvas* c1 = new TCanvas(buf,buf);

    //    h1->Draw();
    //    h1->Write();
    //    f3->Close();
    //    c1->Update();




    TFile *f9 = new TFile("background.root" , "UPDATE");


    // h2->Draw("e");
    //h1->Draw();
    h1->Write();
    //    h2->Draw("same");
    c1->Update();
    //c1->Modified();
    f9->Close();