hadronic/Hadr07/plot2.C

0001 {
0002   gROOT->Reset();
0003
0004   // Draw histos filled by Geant4 simulation
0005   //
0006   TCanvas* c1 = new TCanvas("c1", "  ");
0007
0008   c1->SetLogy(0);
0009   c1->cd();
0010   c1->Update();
0011
0012   TFile fa("water_opt3.root");
0013   TFile fb("water_100um.root");
0014
0015   TH1D* ha1 = (TH1D*)fa.Get("10");
0016   ha1->SetStats(kFALSE);
0017   ha1->SetLineColor(kBlue);
0018   ha1->Draw("HIST");
0019   TH1D* hb1 = (TH1D*)fb.Get("10");
0020   hb1->SetLineColor(kRed);
0021   hb1->Draw("HIST SAME");
0022
0023   // Print the histograms legend
0024   TLegend *le = new TLegend(0.6,0.6,0.8,0.8);
0025   le->AddEntry(ha1,"opt3","l");
0026   le->AddEntry(hb1,"100um","l");
0027   le->Draw();
0028 }