void compareplot()
{
  TCanvas *c1 = new TCanvas("c1","multigraph",600,400);
  
   TFile *f = new TFile ("pthat2_0.root","READ");

  TH1F *h1 = (TH1F*)(f->Get("pTJPsi"));
        h1->Draw();
        c1->Update();
	
  TFile *g = new TFile ("expdata13tev.root","READ");

   TH1F *h2 = (TH1F*)(g->Get("Graph1D_y1"));
  //   h2->SetMarkerStyle(30);
   //	 h2->SetMarkerSize(1.2);
   //	 h2->SetMarkerColor(kBlue);
    h2->SetLineColor(kRed);
   // h2->Scale(scale);
       h2->Draw("SAME");


}
}