doc/v606/piechart_8C.html

void piechart()

{

   Float_t vals[] = {.2,1.1,.6,.9,2.3};

   Int_t colors[] = {2,3,4,5,6};

   Int_t nvals = sizeof(vals)/sizeof(vals[0]);


   TCanvas *cpie = new TCanvas("cpie","TPie test",700,700);

   cpie->Divide(2,2);


   TPie *pie1 = new TPie("pie1",

      "Pie with offset and no colors",nvals,vals);

   TPie *pie2 = new TPie("pie2",

      "Pie with radial labels",nvals,vals,colors);

   TPie *pie3 = new TPie("pie3",

      "Pie with tangential labels",nvals,vals,colors);

   TPie *pie4 = new TPie("pie4",

      "Pie with verbose labels",nvals,vals,colors);


   cpie->cd(1);

   pie1->SetAngularOffset(30.);

   pie1->SetEntryRadiusOffset( 4, 0.1);

   pie1->SetRadius(.35);

   pie1->Draw("3d");


   cpie->cd(2);

   pie2->SetEntryRadiusOffset(2,.05);

   pie2->SetEntryLineColor(2,2);

   pie2->SetEntryLineWidth(2,5);

   pie2->SetEntryLineStyle(2,2);

   pie2->SetEntryFillStyle(1,3030);

   pie2->SetCircle(.5,.45,.3);

   pie2->Draw("rsc");


   cpie->cd(3);

   pie3->SetY(.32);

   pie3->GetSlice(0)->SetValue(.8);

   pie3->GetSlice(1)->SetFillStyle(3031);

   pie3->SetLabelsOffset(-.1);

   pie3->Draw("3d t nol");

   TLegend *pieleg = pie3->MakeLegend();

   pieleg->SetY1(.56); pieleg->SetY2(.86);


   cpie->cd(4);

   pie4->SetRadius(.2);

   pie4->SetLabelsOffset(.01);

   pie4->SetLabelFormat("#splitline{%val (%perc)}{%txt}");

   pie4->Draw("nol <");

}