graphpolar2.C File Reference

Detailed Description

Create and draw a polar graph with PI axis

 
void graphpolar2()
{
   TCanvas * CPol = new TCanvas("CPol","TGraphPolar Example",500,500);
 
   Double_t theta[8];
   Double_t radius[8];
   Double_t etheta[8];
   Double_t eradius[8];
 
   for (int i=0; i<8; i++) {
      theta[i]   = (i+1)*(TMath::Pi()/4.);
      radius[i]  = (i+1)*0.05;
      etheta[i]  = TMath::Pi()/8.;
      eradius[i] = 0.05;
   }
 
   TGraphPolar * grP1 = new TGraphPolar(8, theta, radius, etheta, eradius);
   grP1->SetTitle("");
 
   grP1->SetMarkerStyle(20);
   grP1->SetMarkerSize(2.);
   grP1->SetMarkerColor(4);
   grP1->SetLineColor(2);
   grP1->SetLineWidth(3);
   grP1->Draw("PE");
 
   CPol->Update();
 
   if (grP1->GetPolargram())
      grP1->GetPolargram()->SetToRadian();
}

Author

Olivier Couet

Definition in file graphpolar2.C.