CoCalc Public Filesroot.ipynbOpen with one click!
Author: Harald Schilly
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Compute Environment: Ubuntu 20.04 (Default)

ROOT on CoCalc in Ubuntu 20.04

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TCanvas *c1 = new TCanvas("c1","test",600,700);
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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");
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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();
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gROOT->GetListOfCanvases()->Draw()
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