doc/v620/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");

}

r
ROOT::R::TRInterface & r
Definition: Object.C:4

Int_t
int Int_t
Definition: RtypesCore.h:41

Double_t
double Double_t
Definition: RtypesCore.h:55

TAttLine::SetLineColor
virtual void SetLineColor(Color_t lcolor)
Set the line color.
Definition: TAttLine.h:40

TCanvas
The Canvas class.
Definition: TCanvas.h:31

TF1
1-Dim function class
Definition: TF1.h:211

TF1::Eval
virtual Double_t Eval(Double_t x, Double_t y=0, Double_t z=0, Double_t t=0) const
Evaluate this function.
Definition: TF1.cxx:1429

TGraphPolar
To draw a polar graph.
Definition: TGraphPolar.h:22

TGraphPolar::Draw
void Draw(Option_t *options="")
Draw TGraphPolar.
Definition: TGraphPolar.cxx:102

TGraph::SetTitle
virtual void SetTitle(const char *title="")
Change (i.e.
Definition: TGraph.cxx:2312

TMath::Pi
constexpr Double_t Pi()
Definition: TMath.h:38