Create and draw a polar graph with PI axis
Author: Olivier Couet
This notebook tutorial was automatically generated with ROOTBOOK-izer from the macro found in the ROOT repository on Tuesday, March 19, 2024 at 07:10 PM.
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();
Draw all canvases
gROOT->GetListOfCanvases()->Draw()