nslices_potspill.C

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{

   TFile *file=new TFile("data_ideal.root");
   TH1F *h1=(TH1F*)file->Get("nslices_potspill");
   h1->SetMarkerStyle(8);
   h1->SetLineColor(4);
   h1->SetMarkerColor(4);

   gStyle->SetOptStat(0);

   TCanvas *c1=new TCanvas("nslices_potspill","",700,600);
   c1->cd();

   h1->SetXTitle("POT/spill (#times 10^{12})");
   h1->SetYTitle("No. of slices");
   h1->Draw();
}