Issue with 2D histogram plotting

[lata]

Dear experts,

I am trying to produce a similar plot given at [1]. Although I am able to plot 2D histogram with colz option, I am not able to understand that how the highlighted histogram with red lines, in this plot, should be drawn over this 2D histogram. Could you please give me a hint or an example?

Thanks,

Lata

[1] http://cms-results.web.cern.ch/cms-results/public-results/publications/HIG-20-014/CMS-HIG-20-014_Figure_006.png

---

Please read tips for efficient and successful posting and posting code

ROOT Version: Not Provided
Platform: Not Provided
Compiler: Not Provided

---

[dastudillo]

Use a TCutG.

{
   TCanvas *c = new TCanvas("c1","c1",800,800);
   TH2F *hcol1 = new TH2F("hcol1","",40,-4,4,40,-20,20);
   float px, py;
   for (Int_t i = 0; i < 25000; i++) {
      gRandom->Rannor(px,py);
      hcol1->Fill(px,5*py);
   }
   hcol1->Draw("COLZ");

   TCutG *cutg = new TCutG("mycut",4);
   cutg->SetVarX("x");
   cutg->SetVarY("y");
   cutg->SetFillColor(2);
   cutg->SetFillStyle(3004);
   cutg->SetLineColor(2);
   cutg->SetLineWidth(3);
   cutg->SetPoint(0,-2.575251,4.411765);
   cutg->SetPoint(1,-1.220736,10.16043);
   cutg->SetPoint(2,-0.735786,-3.877005);
   cutg->SetPoint(3,-2.575251,4.411765);
   cutg->Draw("L F");  // Line (perimeter), Fill
   return;
}
![c1|514x500](upload://biaFaPGnwec9eniuJUPWxSnlVlN.png)

[dastudillo]

[lata]

Thanks, @dastudillo for the quick response. It worked perfectly.

[Gary896]

I have also same issue any suggestion for this so please reply.