sparsehist.C: Evaluate the performance of THnSparse vs THnF (or Float_t arrays) | Histograms | th2polyEurope.C: This tutorial illustrates how to create an histogram with polygonal |
//This tutorial illustrates how to create an histogram with polygonal //bins (TH2Poly). The bins are boxes. // //Author: Olivier Couet { TCanvas *ch2p2 = new TCanvas("ch2p2","ch2p2",600,400); TH2Poly *h2p = new TH2Poly(); h2p->SetName("Boxes"); h2p->SetTitle("Boxes"); gStyle->SetPalette(1); Int_t i,j; Int_t nx = 40; Int_t ny = 40; Double_t x1,y1,x2,y2; Double_t dx=0.2, dy=0.1; x1 = 0.; x2 = dx; for (i = 0; i<nx; i++) { y1 = 0.; y2 = dy; for (j = 0; j<ny; j++) { h2p->AddBin(x1, y1, x2, y2); y1 = y2; y2 = y2+y2*dy; } x1 = x2; x2 = x2+x2*dx; } TRandom ran; for (i = 0; i<300000; i++) { h2p->Fill(50*ran.Gaus(2.,1), ran.Gaus(2.,1)); } h2p->Draw("COLZ"); return ch2p2; } th2polyBoxes.C:1 th2polyBoxes.C:2 th2polyBoxes.C:3 th2polyBoxes.C:4 th2polyBoxes.C:5 th2polyBoxes.C:6 th2polyBoxes.C:7 th2polyBoxes.C:8 th2polyBoxes.C:9 th2polyBoxes.C:10 th2polyBoxes.C:11 th2polyBoxes.C:12 th2polyBoxes.C:13 th2polyBoxes.C:14 th2polyBoxes.C:15 th2polyBoxes.C:16 th2polyBoxes.C:17 th2polyBoxes.C:18 th2polyBoxes.C:19 th2polyBoxes.C:20 th2polyBoxes.C:21 th2polyBoxes.C:22 th2polyBoxes.C:23 th2polyBoxes.C:24 th2polyBoxes.C:25 th2polyBoxes.C:26 th2polyBoxes.C:27 th2polyBoxes.C:28 th2polyBoxes.C:29 th2polyBoxes.C:30 th2polyBoxes.C:31 th2polyBoxes.C:32 th2polyBoxes.C:33 th2polyBoxes.C:34 th2polyBoxes.C:35 th2polyBoxes.C:36 th2polyBoxes.C:37 th2polyBoxes.C:38 th2polyBoxes.C:39 th2polyBoxes.C:40 th2polyBoxes.C:41 |
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