void modeadz()
{
  TChain *t1 = new TChain();
  t1->Add("/home/souvik/new_belle_analysis/muon_mode/generic_mc/mu_charm_*.root/h1");
  Float_t modedz ;

  t1->SetBranchAddress("modedz",&modedz);

  TH1F *hist1 = new TH1F("hist1","modeadz",80, 0,200);

  for (Int_t i=0; i < t1->GetEntries(); ++i)
    {
      t1->GetEntry(i);
      {
	hist1->Fill(modedz);	
      }
    }
      
  hist1->GetBinContent(100);
  hist1->Draw();

}