C++ THStack::DrawClone方法代码示例

void compareWeights(const char* fileName, const std::string plotTitle,
                    const std::string plotType, const std::string plot,
                    const std::string xlabel, const float xMin, const float xMax) {
    gStyle->SetOptStat(0);
    gROOT->ForceStyle();
 
    THStack* histStack = new THStack("histStack", plotTitle.c_str());
    TLegend* legend = new TLegend(.55 ,.55 ,.885 ,.875);
    legend->SetFillColor(kWhite);
     
    std::vector<std::string> weightNames = {"unit wgt = 0.000001"};
                                            //{"f_{T1} = 5e-12 ", "f_{T1} = 4e-12 ", 
                                            //"f_{T1} = 1.5e-12 ", "Standard Model"};
    std::vector<int> colors = {kRed-7, kAzure-3, kGreen-6, kBlack, kBlue-4};

    TFile signal_file(fileName);
    TCanvas* canvas = new TCanvas("canvas","Weight Comparison",150,10,990,660);
    canvas->cd();

    int numBins = 13;
    float rebinPoint = 0;
    double variableBins[numBins+1];
    for (int i = 0; i <= numBins; i++)
    {
        if (i < 10)
            rebinPoint += 75.;
        else if (i < 11)
            rebinPoint += 150.;
        else
            rebinPoint += 200;
        variableBins[i] = rebinPoint;
    }

    std::string bg_path = "/nfs_scratch/kdlong/wpz_zg_qcdbkgd/Events/run_01/";
    bg_path += fileName; 
    addBackground(histStack, bg_path, plotType, plot, legend, "WZ EWK + QCD",
                  variableBins, numBins);

    for (unsigned int i = 0; i < weightNames.size(); i++)
    {
        std::string path = weightNames[i] + "/" + plotType + "/" + plot;
        TH1F* hist = static_cast<TH1F*>(signal_file.GetObjectChecked(path.c_str(), 
                                                                     "TH1F"));
        //hist->SetFillColor(colors[i]);
        hist->SetLineColor(colors[i]);
        hist->SetLineWidth(2);
        TH1* histRebin = hist->Rebin(numBins, "histRebin", variableBins);
        histRebin->Sumw2();
        histStack->Add(histRebin, "hist E1");
        std::string legendName = "WZ EWK (" + weightNames[i] + ")";
        legend->AddEntry(hist, legendName.c_str(), "l");
    }
    
    histStack->Draw("nostack");
    histStack->GetXaxis()->SetTitle(xlabel.c_str());
    histStack->GetYaxis()->SetTitle("Events");
    //histStack->GetXaxis()->SetRangeUser(xMin, xMax); 
    //histStack->SetMaximum(125); 
    histStack->DrawClone("nostack");
    legend->DrawClone("same");
    canvas->Update();
    canvas->Print("WZTMassComp_zg_bg_cuts.pdf");
}

void plot_bgnd(int ch=4) {
  vector<fileInfo> files;
  files.push_back(fileInfo("u#bar{u}", TFile::Open(Form("Histo_ch%d_uubar.root"  ,ch)), kRed));
  files.push_back(fileInfo("d#bar{d}", TFile::Open(Form("Histo_ch%d_ddbar.root"  ,ch)), kGreen));
  files.push_back(fileInfo("s#bar{s}", TFile::Open(Form("Histo_ch%d_ssbar.root"  ,ch)), kBlue));
  files.push_back(fileInfo("c#bar{c}", TFile::Open(Form("Histo_ch%d_ccbar.root"  ,ch)), kOrange));
  // files.push_back(fileInfo("mixed",    TFile::Open(Form("Histo_ch%d_mixed.root"  ,ch)), kViolet));
  // files.push_back(fileInfo("charged",  TFile::Open(Form("Histo_ch%d_charged.root",ch)), kGray));

  gStyle->SetPadTopMargin(0.10);
  gStyle->SetOptStat(0);
  gStyle->SetTitleSize(.5,"XYZ");

  TLatex* tt=new TLatex();
  tt->SetTextSize(0.05);

  vector<plotInfo> plotInfos;
  getWhatToPlot(ch, plotInfos);

  if (plotAllDistributions) {
    TLine* tl=new TLine();
    tl->SetLineWidth(2);
    tl->SetLineColor(kRed+2);
    int nHisto=plotInfos.size();

    int nX=3, nY=1;
    float sizeX=900,sizeY=300;
    const int nCanvas(nHisto/(nX*nY)+1);

    TLegend* tleg=new TLegend(0.8,0.6,0.96,0.89);
    tleg->SetFillStyle(0);

    TCanvas* c0[nCanvas];
    int iCan=0;
    c0[iCan]=new TCanvas(Form("c0%d",iCan),"Before Cuts",sizeX,sizeY);
    c0[iCan]->Divide(nX,nY);
    int i=0;
    for (vector<plotInfo>::const_iterator h=plotInfos.begin(); h!=plotInfos.end(); ++h) {
      THStack hs;
      TString xTitle;
      for (vector<fileInfo>::const_iterator f=files.begin(); f!=files.end(); ++f) {
        c0[iCan]->cd(i+1);
        (f->file)->cd("AllCandidates");
        TH1* htmp=(TH1F*)gDirectory->Get(h->name);
        float ymin=0;
        if (h->log) {
          gPad->SetLogy();
          ymin=10;
        }
        if (htmp) {
          htmp->GetXaxis()->SetTitleOffset(.7);
          htmp->GetXaxis()->SetTitleSize(0.08);
          htmp->SetFillColor(f->color);
          htmp->SetMinimum(ymin);
          hs.Add(htmp);
          xTitle=htmp->GetXaxis()->GetTitle();
          if (i==0) {
            tleg->AddEntry(htmp,f->name,"f");
          }
        }
      }
      hs.DrawClone();
      tt->SetTextAlign(32);
      tt->DrawLatexNDC(0.95,.03,xTitle);

      tl->DrawLine(h->cutLow,ymin,h->cutLow,htmp->GetMaximum()*1.05);
      tl->DrawLine(h->cutHigh,ymin,h->cutHigh,htmp->GetMaximum()*1.05);
      if (i==0) tleg->Draw();
      ++i;

      // Check if I need a new canvas
      if (i>nX*nY) {
        channel(ch,c0[iCan]);
        c0[iCan]->Print(Form("Ch%d_all_distr%d_bgnd.pdf",ch,iCan));
        c0[iCan]->Print(Form("Ch%d_all_distr%d_bgnd.png",ch,iCan));
        iCan++;
        c0[iCan]=new TCanvas(Form("c0%d",iCan),"Before Cuts",sizeX,sizeY);
        c0[iCan]->Divide(nX,nY);
        tleg->Clear();
        i=0;
      }
    }
    channel(ch,c0[iCan]);
    c0[iCan]->Print(Form("Ch%d_all_distr%d_bgnd.pdf",ch,iCan));
    c0[iCan]->Print(Form("Ch%d_all_distr%d_bgnd.png",ch,iCan));
  }


  if(plotGoldDistributions) {

    TLine* tl=new TLine();
    tl->SetLineWidth(2);
    tl->SetLineColor(kRed+2);
    TCanvas* c1=new TCanvas("c1","Before Cuts",900,600);
    c1->Divide(3,2);
    TLegend* tleg=new TLegend(0.8,0.6,0.96,0.89);
    tleg->SetFillStyle(0);
    int i=0;
    for (vector<plotInfo>::const_iterator h=plotInfos.begin(); h!=plotInfos.end(); ++h) {
      if (!h->gold) continue;
//.........这里部分代码省略.........

void Interpolate(const TString& trigger="INEL")
{
  if (gSystem->Getenv("FWD"))
    fwd = gSystem->Getenv("FWD");
  else 
    fwd = gSystem->ExpandPathName("$ALICE_PHYSICS/PWGLF/FORWARD/analysis2");
  gROOT->SetMacroPath(Form("%s/dndeta:%s", gROOT->GetMacroPath(),fwd));

  if (!gROOT->GetClass("Drawer"))  gROOT->LoadMacro("Drawer.C+");

  TH1* h0900 = GetOne( 900, trigger);
  TH1* h2760 = GetOne(2760, trigger);
  TH1* h7000 = GetOne(7000, trigger);
  TH1* h8000 = GetOne(8000, trigger);
  Info("","900: %p 2760: %p 7000: %p 8000: %p", 
       h0900, h2760, h7000, h8000);
  Double_t e8000 = (trigger.EqualTo("INEL") ? 0.852 : 0.93);
  h8000->Scale(e8000);

  TFile* out = TFile::Open("trends.root", "RECREATE");
  THStack* sOrig = new THStack("orig", Form("pp - %s", trigger.Data()));
  sOrig->Add(h8000);
  sOrig->Add(h7000);
  sOrig->Add(h2760);
  sOrig->Add(h0900);

  TCanvas* cOrig = new TCanvas("cOrig", "Original", 1200, 1200);
  cOrig->SetTopMargin(0.01);
  cOrig->SetRightMargin(0.01);
  sOrig->Draw("nostack");
  sOrig->GetHistogram()->SetYTitle("1/#it{N} d#it{N}_{ch}/d#it{#eta}");
  sOrig->GetHistogram()->SetXTitle("#it{#eta}");
  sOrig->DrawClone("nostack");
  sOrig->Write();
  
  TLegend* l = cOrig->BuildLegend(.35, .2, .55, .6, "#sqrt{s}");
  l->SetFillColor(0);
  l->SetFillStyle(0);
  l->SetBorderSize(0);

  cOrig->Modified();
  cOrig->Update();
  cOrig->cd();
  cOrig->Write();
  Info("", "Wrote original"); 

  TCanvas* cG = new TCanvas("cG", "one", 1200, 1200);
  cG->SetTopMargin(0.01);
  cG->SetRightMargin(0.01);
  
  Info("","Creating tuple");
  TNtuple* tuple = new TNtuple("tuple", "Tuple", 
			       "eta:deta:"
			       "v0900:e0900:v2760:e2760:"
			       "v7000:e7000:v8000:e8000");
  TMultiGraph* mg = new TMultiGraph;
  Int_t n = h0900->GetNbinsX();
  Info("","Loop over bins %d", n);

  for (Int_t i = 1; i <= n; i++) {
    Info("", "Getting one bin %d,%p,%p,%p,%p,%p,%p",
	 i, h0900,h2760,h7000,h8000,mg,tuple);
    OneBin(i, h0900, h2760, h7000, h8000, mg, tuple);
  }
  mg->Draw("alp");

  cG->Modified();
  cG->Update();
  cG->cd();

  TPrincipal* p =tuple->Principal("v0900:v2760:v7000:v8000","eta<0", "npdhc");
}