72 lines
1.8 KiB
C++
72 lines
1.8 KiB
C++
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void PID_paper(double gamma, int start= 1){
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TFile * f1 = new TFile("pid_total.root");
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TH2F * hPID = (TH2F*) f1->Get("hPID2");
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gStyle->SetOptStat(""); /// no state
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gStyle->SetOptTitle(0); /// no title
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TCanvas * ccc = new TCanvas("ccc", "ccc", 1000, 1000);
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///ccc->Divide(2,1);
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///========= set Z-color
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///---- custom color
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///Int_t colors[] = {0, 1, 2, 3, 4, 5, 6};
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///gStyle->SetPalette((sizeof(colors)/sizeof(Int_t)), colors);
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///----- build-in color
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int color = kBeach;
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//int color = kGreenBrownTerrain;
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//int color = kColorPrintableOnGrey;
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//int color = kSunset;
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///gStyle->SetPalette(kBlueRedYellow);
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///gStyle->SetPalette(kRainBow);
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gStyle->SetPalette(color);TColor::InvertPalette();
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///======== set contours
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TGraph * ggg = new TGraph(); /// this is for displaying the gamma correction
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const int nCon = 200; /// number of contours
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double contours[nCon];
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double zMax = hPID->GetMaximum();
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for( int i = 0; i < nCon; i++){
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double xpos = i*1.0/nCon;
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double ypos = TMath::Power(xpos, gamma) *0.95;
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contours[i] = start + ypos*(zMax - start);
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ggg->AddPoint(xpos, ypos);
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}
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ccc->cd();ccc->cd()->SetGrid(0,0);
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hPID->GetYaxis()->SetRangeUser(1.5, 16);
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hPID->SetContour(nCon, contours);
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hPID->Draw("col");
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TEllipse * si42 = new TEllipse(3.01, 14, 0.05, 0.55);
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si42->SetFillStyle(0);
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si42->SetLineColor(2);
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si42->SetLineWidth(3);
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si42->Draw("same");
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TLatex text;
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text.SetTextColor(2);
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text.SetTextSize(0.05);
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text.DrawLatex(3.05, 14.2, "^{42}Si");
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///------ in case want to see the gamma correction
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///ccc->cd(2);
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///ggg->Draw("AP*");
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///====== save as pdf
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ccc->SaveAs(Form("haha_%3.1f_%d_%d.pdf", gamma, start, color));
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}
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