doc/hackathon/gr014__polar3_8C.html

void gr014_polar3()

{

   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
Signed integer 4 bytes (int).
Definition RtypesCore.h:59

Double_t
double Double_t
Double 8 bytes.
Definition RtypesCore.h:73

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

TAttLine::SetLineColor
virtual void SetLineColor(Color_t lcolor)
Set the line color.
Definition TAttLine.h:44

TCanvas
The Canvas class.
Definition TCanvas.h:23

TF1
Definition TF1.h:182

TF1::Eval
virtual Double_t Eval(Double_t x, Double_t y=0, Double_t z=0, Double_t t=0) const

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

TGraphPolar::Draw
void Draw(Option_t *options="") override
Draw TGraphPolar.
Definition TGraphPolar.cxx:99

TGraph::SetTitle
void SetTitle(const char *title="") override
Set the title of the TNamed.

TMath::Pi
constexpr Double_t Pi()
Definition TMath.h:40

gr014_polar3
Definition gr014_polar3.py:1