本文整理汇总了C++中TH2::GetEntries方法的典型用法代码示例。如果您正苦于以下问题：C++ TH2::GetEntries方法的具体用法？C++ TH2::GetEntries怎么用？C++ TH2::GetEntries使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类TH2的用法示例。
在下文中一共展示了TH2::GetEntries方法的2个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: root_hist_test
void root_hist_test()
{
// Project3D uses overflows?
TH3* h3D = new TH3D("h3D", "h3D", 2,0,2, 2,0,2, 2,0,2);
for(int i=0; i<=h3D->GetNbinsX()+1; i++) {
for(int j=0; j<=h3D->GetNbinsY()+1; j++) {
for(int k=0; k<=h3D->GetNbinsZ()+1; k++) {
h3D->SetBinContent(i,j,k, 1);
}
}
}
printf("h3D integral = %d\tentries = %d\n", h3D->Integral(), h3D->GetEntries());
h3D->GetZaxis()->SetRange(3,3);
TH2* hYX = (TH2*) h3D->Project3D("yx");
printf("hYX integral = %d\tentries = %d\n", hYX->Integral(), hYX->GetEntries());
hYX->Draw("colz");
}示例2: QAtracklets
void QAtracklets(const Char_t *fdata, const Char_t *fmc)
{
style();
TFile *fdtin = TFile::Open(fdata);
TList *ldtin = (TList *)fdtin->Get("clist");
TH2 *hdtin = (TH2 *)ldtin->FindObject("etaphiTracklets");
TH1 *pdtin = (TH1 *)hdtin->ProjectionY("pdtin_tracklets");
pdtin->SetMarkerStyle(20);
pdtin->SetMarkerSize(1.);
pdtin->SetMarkerColor(kAzure-3);
hdtin->Scale(1. / hdtin->GetEntries());
pdtin->Scale(1. / hdtin->GetEntries());
TFile *fmcin = TFile::Open(fmc);
TList *lmcin = (TList *)fmcin->Get("clist");
if(!lmcin) {
std::cout << "NOLIST" << std::endl;
}
lmcin->ls();
TH2 *hmcin = (TH2 *)lmcin->FindObject("etaphiTracklets");
if(!hmcin) {
std::cout << "NO H!! etaphiTracklets" << std::endl;
}
TH1 *pmcin = (TH1 *)hmcin->ProjectionY("pmcin_tracklets");
pmcin->SetLineColor(kRed+1);
pmcin->SetFillStyle(1001);
pmcin->SetFillColorAlpha(kRed+1, 0.1);
hmcin->Scale(1. / hmcin->GetEntries());
pmcin->Scale(1. / hmcin->GetEntries());
/*
pdtin->Scale(pmcin->Integral(pmcin->FindBin(0. + 0.001),
pmcin->FindBin(1. - 0.001))
/ pdtin->Integral(pdtin->FindBin(0. + 0.001),
pdtin->FindBin(1. - 0.001)));
*/
TCanvas *cData = new TCanvas("cTrackletData", "cTrackletData", 800, 800);
// cData->SetLogz();
TH1 * hfr = cData->DrawFrame(-2.5, 0., 2.5, 2. * TMath::Pi());
hfr->SetTitle(";#eta;#varphi");
hdtin->Draw("same,col");
cData->SaveAs(canvasPrefix+"trackletData.pdf");
TCanvas *cMC = new TCanvas("cTrackletMC", "cTrackletMC", 800, 800);
// cMC->SetLogz();
hfr = cMC->DrawFrame(-2.5, 0., 2.5, 2. * TMath::Pi());
hfr->SetTitle(";#eta;#varphi");
hmcin->Draw("same,col");
cMC->SaveAs(canvasPrefix+"trackletMC.pdf");
TCanvas *cPhi = new TCanvas("cTrackletPhi", "cTrackletPhi", 800, 800);
// cPhi->SetLogy();
hfr = cPhi->DrawFrame(0., 0., 2. * TMath::Pi(), 0.01);
hfr->SetTitle(";#varphi;");
pdtin->DrawCopy("same");
pmcin->DrawCopy("same,histo");
TLegend *legend = new TLegend(0.20, 0.18+0.63, 0.50, 0.30+0.63);
legend->SetFillColor(0);
legend->SetBorderSize(0);
legend->SetTextFont(42);
legend->SetTextSize(0.04);
legend->AddEntry(pdtin, "data", "pl");
legend->AddEntry(pmcin, "Monte Carlo", "l");
legend->Draw("same");
cPhi->SaveAs(canvasPrefix+"trackletPhi.pdf");
TCanvas *cPhir = new TCanvas("cTrackletPhir", "cTrackletPhir", 800, 800);
// cPhi->SetLogy();
hfr = cPhir->DrawFrame(0., 0.5, 2. * TMath::Pi(), 1.5);
hfr->SetTitle(";#varphi;data / Monte Carlo");
pdtin->Divide(pmcin);
pdtin->Draw("same");
cPhir->SaveAs(canvasPrefix+"trackletPhir.pdf");
}