doc/v626/graphpolar_8C.html

void graphpolar()

{

   // Illustrates how to use TGraphPolar


   TCanvas * CPol = new TCanvas("CPol","TGraphPolar Examples",1200,600);

   CPol->Divide(2,1);

   CPol->cd(1);


   Double_t xmin=0;

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


   Double_t x[1000];

   Double_t y[1000];

   Double_t xval1[20];

   Double_t yval1[20];


   TF1 * fplot = new TF1("fplot","cos(2*x)*cos(20*x)",xmin,xmax);


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

      x[ipt] = ipt*(xmax-xmin)/1000+xmin;

      y[ipt] = fplot->Eval(x[ipt]);

   }


   TGraphPolar * grP = new TGraphPolar(1000,x,y);

   grP->SetLineColor(2);

   grP->SetLineWidth(2);

   grP->SetFillStyle(3012);

   grP->SetFillColor(2);

   grP->Draw("AFL");


   for (Int_t ipt = 0; ipt < 20; ipt++){

      xval1[ipt] = x[1000/20*ipt];

      yval1[ipt] = y[1000/20*ipt];

   }


   TGraphPolar * grP1 = new TGraphPolar(20,xval1,yval1);

   grP1->SetMarkerStyle(29);

   grP1->SetMarkerSize(2);

   grP1->SetMarkerColor(4);

   grP1->SetLineColor(4);

   grP1->Draw("CP");


   // Update, otherwise GetPolargram returns 0

   CPol->Update();

   grP1->GetPolargram()->SetTextColor(8);

   grP1->GetPolargram()->SetRangePolar(-TMath::Pi(),TMath::Pi());

   grP1->GetPolargram()->SetNdivPolar(703);

   grP1->GetPolargram()->SetToRadian();


   CPol->cd(2);

   Double_t x2[30];

   Double_t y2[30];

   Double_t ex[30];

   Double_t ey[30];

   for (Int_t ipt = 0; ipt < 30; ipt++){

      x2[ipt] = x[1000/30*ipt];

      y2[ipt] = 1.2 + 0.4*sin(TMath::Pi()*2*ipt/30);

      ex[ipt] = 0.2+0.1*cos(2*TMath::Pi()/30*ipt);

      ey[ipt] = 0.2;

   }


   TGraphPolar * grPE = new TGraphPolar(30,x2,y2,ex,ey);

   grPE->SetMarkerStyle(22);

   grPE->SetMarkerSize(1.5);

   grPE->SetMarkerColor(5);

   grPE->SetLineColor(6);

   grPE->SetLineWidth(2);

   grPE->Draw("EP");

   CPol->Update();

   grPE->GetPolargram()->SetTextSize(0.03);

   grPE->GetPolargram()->SetTwoPi();

   grPE->GetPolargram()->SetToRadian();

}

x2
static const double x2[5]
Definition RooGaussKronrodIntegrator1D.cxx:364

Int_t
int Int_t
Definition RtypesCore.h:45

Double_t
double Double_t
Definition RtypesCore.h:59

xmin
float xmin
Definition THbookFile.cxx:95

xmax
float xmax
Definition THbookFile.cxx:95

TAttFill::SetFillColor
virtual void SetFillColor(Color_t fcolor)
Set the fill area color.
Definition TAttFill.h:37

TAttFill::SetFillStyle
virtual void SetFillStyle(Style_t fstyle)
Set the fill area style.
Definition TAttFill.h:39

TAttLine::SetLineWidth
virtual void SetLineWidth(Width_t lwidth)
Set the line width.
Definition TAttLine.h:43

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

TAttMarker::SetMarkerColor
virtual void SetMarkerColor(Color_t mcolor=1)
Set the marker color.
Definition TAttMarker.h:38

TAttMarker::SetMarkerStyle
virtual void SetMarkerStyle(Style_t mstyle=1)
Set the marker style.
Definition TAttMarker.h:40

TAttMarker::SetMarkerSize
virtual void SetMarkerSize(Size_t msize=1)
Set the marker size.
Definition TAttMarker.h:41

TAttText::SetTextColor
virtual void SetTextColor(Color_t tcolor=1)
Set the text color.
Definition TAttText.h:44

TAttText::SetTextSize
virtual void SetTextSize(Float_t tsize=1)
Set the text size.
Definition TAttText.h:47

TCanvas
The Canvas class.
Definition TCanvas.h:23

TCanvas::cd
TVirtualPad * cd(Int_t subpadnumber=0) override
Set current canvas & pad.
Definition TCanvas.cxx:706

TCanvas::Update
void Update() override
Update canvas pad buffers.
Definition TCanvas.cxx:2502

TF1
1-Dim function class
Definition TF1.h:213

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:1440

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

TGraphPolar::GetPolargram
TGraphPolargram * GetPolargram()
Definition TGraphPolar.h:40

TGraphPolar::Draw
void Draw(Option_t *options="")
Draw TGraphPolar.
Definition TGraphPolar.cxx:100

TGraphPolargram::SetRangePolar
void SetRangePolar(Double_t tmin, Double_t tmax)
Allows to change range Polar.
Definition TGraphPolargram.cxx:874

TGraphPolargram::SetTwoPi
void SetTwoPi()
Set range from 0 to 2*pi.
Definition TGraphPolargram.cxx:945

TGraphPolargram::SetNdivPolar
void SetNdivPolar(Int_t Ndiv=508)
Set the number of Polar divisions: enter a number ij with 0<i<99 and 0<j<99.
Definition TGraphPolargram.cxx:773

TGraphPolargram::SetToRadian
void SetToRadian()
The Polar circle is labelled using radian.
Definition TGraphPolargram.cxx:934

TPad::Divide
void Divide(Int_t nx=1, Int_t ny=1, Float_t xmargin=0.01, Float_t ymargin=0.01, Int_t color=0) override
Automatic pad generation by division.
Definition TPad.cxx:1178

y
Double_t y[n]
Definition legend1.C:17

x
Double_t x[n]
Definition legend1.C:17

ey
Double_t ey[n]
Definition legend1.C:17

ex
Double_t ex[n]
Definition legend1.C:17

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