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plot2.C
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1 {
2  gROOT->Reset();
3 
4  // Draw histos filled by Geant4 simulation
5  //
6  TCanvas* c1 = new TCanvas("c1", " ");
7 
8  c1->SetLogy(1);
9  c1->cd();
10  c1->Update();
11 
12  TFile fa("Li7.root");
13  TFile fb("Li6.root");
14 
15  TH1D* ha1 = (TH1D*)fa.Get("6");
16  ha1->SetStats(kFALSE);
17  ha1->SetLineColor(kBlue);
18  ha1->Draw("HIST");
19  TH1D* hb1 = (TH1D*)fb.Get("6");
20  hb1->SetLineColor(kRed);
21  hb1->Draw("HIST SAME");
22 
23  // Print the histograms legend
24  TLegend *le = new TLegend(0.6,0.6,0.8,0.8);
25  le->AddEntry(ha1,"Li7","l");
26  le->AddEntry(hb1,"Li6","l");
27  le->Draw();
28 }