th2polyHoneycomb.C File Reference

Detailed Description

This tutorial illustrates how to create an histogram with hexagonal bins (TH2Poly).

The method TH2Poly::Honeycomb allows to build automatically an honeycomb binning.

 
void th2polyHoneycomb(){
   TCanvas *C = new TCanvas("C", "C", 1200, 600);
   C->Divide(2,1);
 
   TH2Poly *hc1 = new TH2Poly();
   hc1->Honeycomb(0, 0, .1, 5, 5);
   hc1->SetTitle("Option V (default)");
   hc1->SetStats(0);
   hc1->Fill(.1, .1, 15.);
   hc1->Fill(.4, .4, 10.);
   hc1->Fill(.5, .5, 20.);
 
   TH2Poly *hc2 = new TH2Poly();
   hc2->Honeycomb(0, 0, .1, 5, 5, "h");
   hc2->SetTitle("Option H");
   hc2->SetStats(0);
   hc2->Fill(.1, .1, 15.);
   hc2->Fill(.4, .4, 10.);
   hc2->Fill(.5, .5, 20.);
 
   C->cd(1)->SetGrid();
   hc1->Draw("colz L");
   C->cd(2)->SetGrid();
   hc2->Draw("colz L");
}

Author

Olivier Couet

Definition in file th2polyHoneycomb.C.