doc/v634/graphpolar3_8C.html

void graphpolar3()

{

   TCanvas *CPol = new TCanvas("CPol","TGraphPolar Examples",500,500);


   Double_t rmin = 0;

   Double_t rmax = TMath::Pi()*2;

   Double_t r[1000];

   Double_t theta[1000];


   TF1 *fp1 = new TF1("fplot","cos(x)",rmin,rmax);

   for (Int_t ipt = 0; ipt < 1000; ipt++) {

      r[ipt] = ipt*(rmax-rmin)/1000+rmin;

      theta[ipt] = fp1->Eval(r[ipt]);

   }


   TGraphPolar *grP1 = new TGraphPolar(1000, r, theta);

   grP1->SetTitle("");

   grP1->SetLineColor(2);

   grP1->Draw("AOL");

}

Int_t
int Int_t
Definition RtypesCore.h:45

Double_t
double Double_t
Definition RtypesCore.h:59

TRangeDynCast
ROOT::Detail::TRangeCast< T, true > TRangeDynCast
TRangeDynCast is an adapter class that allows the typed iteration through a TCollection.
Definition TCollection.h:358

r
Option_t Option_t TPoint TPoint const char GetTextMagnitude GetFillStyle GetLineColor GetLineWidth GetMarkerStyle GetTextAlign GetTextColor GetTextSize void char Point_t Rectangle_t WindowAttributes_t Float_t r
Definition TGWin32VirtualXProxy.cxx:168

ROOT::Detail::TRangeCast
Definition TCollection.h:311

TCanvas
The Canvas class.
Definition TCanvas.h:23

TF1
1-Dim function class
Definition TF1.h:233

TGraphPolar
To draw a polar graph.
Definition TGraphPolar.h:23

TMath::Pi
constexpr Double_t Pi()
Definition TMath.h:37