ch01_marathon.C

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//                                //
//   	@visionlib.postach.io     //
//                                //
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void titleStyle(TH1* h1){
    h1->GetYaxis()->CenterTitle();
    h1->GetXaxis()->CenterTitle();
    h1->GetXaxis()->SetLabelSize(h1->GetXaxis()->GetTitleSize()*1.2);
    h1->GetYaxis()->SetLabelSize(h1->GetYaxis()->GetTitleSize()*1.2);
    h1->GetXaxis()->SetTitleSize(h1->GetXaxis()->GetLabelSize()*1.2);
    h1->GetYaxis()->SetTitleSize(h1->GetYaxis()->GetLabelSize()*1.2);
    h1->GetYaxis()->SetTitleOffset(0.9);
}
void ch01_marathon(){
    int minute;
    int finisher;
    ifstream cfile("ch01_marathon.txt");
    string dummyline;
    getline(cfile,dummyline);
    TH1F* hminute = new TH1F( "hminute", " " ,90,120,240);
    while (!cfile.eof()){
        cfile >> minute >> finisher;
        hminute->Fill(minute,finisher);
    }
    
    new TCanvas;
    hminute->GetXaxis()->SetTitle("Time to complete (in minute)");
    hminute->GetYaxis()->SetTitle("Number of finishers");
    hminute->SetLineWidth(3);
    Int_t ci;
    ci = TColor::GetColor("#B45F04");
    hminute->SetLineColor(ci);
    hminute->SetFillColor(36);
    titleStyle(hminute);
    hminute->Draw();
    gPad->Print("plots/ch01_marathon.png");
    
}