PS_eff.C

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// The following are special comments used by RootSpy to know
// which histograms to fetch for the macro.
//

// hnamepath: /PSPair/PSC/PSC_PSCIDLeftVsIDRight
// hnamepath: /PSPair/PSC_PS/PS_PSCIDLeftVsIDRight

{
    TDirectory *dir = (TDirectory*)gDirectory->FindObjectAny("PSPair");
    if(dir) dir->cd();

    TH2F *id_LR_D =(TH2F*)gDirectory->Get("PSC/PSC_PSCIDLeftVsIDRight");
    TH2F *id_LR_N =(TH2F*)gDirectory->Get("PSC_PS/PS_PSCIDLeftVsIDRight");

    TH2F *eff = (TH2F*)id_LR_N->Clone();
    eff->Sumw2();
    eff->Divide(id_LR_N,id_LR_D);

    if(gPad == NULL){
        TCanvas *c1 = new TCanvas("c1","Fine PS Efficiency",150,10,990,660);
        c1->cd(0);
        c1->Draw();
        c1->Update();
    }

    if(!gPad) return;
    TCanvas* c1 = gPad->GetCanvas();

    double tsize = 0.045;
    gStyle->SetOptStat("");
    eff->SetTitle("Fine PS Efficiency: N(PSC,PS) / N(PSC)");
    eff->SetTitleSize(tsize);
    eff->SetTitleSize(tsize,"xy");
    eff->Draw("colz");

}