Dear Experts
I have a problem regarding stacking of histograms. I want to stack histograms for signals and backgrounds. I am getting my variables (Histograms) from muminus_plotter.root. When i try to draw it give me blank plots with no data. The code as well as the result is given below. Kindly if you can help me to figure it out.
Code
{
{
TString path = "/root/from_Qamar/";
TFile *file1 = new TFile(path+"muminus_plotter.root");
THStack hs("hs"," stacked histograms");
TH1F *h_0 = new TH1F("h_0","h_0",100,-100,100);
TH1F *h_1 = new TH1F("h_1","h_1",100,-100,100);
TH1F *h_3 = new TH1F("h_3","h_3",100,-100,100);
TH1F *h_4 = new TH1F("h_4","h_4",100,-100,100);
TH1F *h_5 = new TH1F("h_5","h_5",100,-100,100);
TH1F* h_0 = (TH1F*)file1->Get("nbtags_4j/nbtags_4j_W");
TH1F* h_1 = (TH1F*)file1->Get("nbtags_4j/nbtags_4j_DY");
TH1F* h_3 = (TH1F*)file1->Get("nbtags_4j/nbtags_4j_Single top");
TH1F* h_4 = (TH1F*)file1->Get("nbtags_4j/nbtags_4j_Multiboson");
TH1F* h_5 = (TH1F*)file1->Get("nbtags_4j/nbtags_4j_t#bar{t}+V");
//signal
TH1F* h_2 = (TH1F*)file1->Get("nbtags_4j/nbtags_4j_t#bar{t}");
TH1F *h_2 = new TH1F("h_2","h_2",100,-100,100);
h_0->Fill("nbtags_4j/nbtags_4j_W",1000);
h_0->SetFillColor(kRed);
h_0->GetYaxis()->SetRange(0,100);
h_0->GetXaxis()->SetRange(0,100);
h_0->Draw();
hs->Add(h_0);
h_1->Fill("nbtags_4j/nbtags_4j_DY",1000);
h_1->SetFillColor(kBlue);
hs->Add(h_1);
h_3->FillRandom("nbtags_4j/nbtags_4j_Single top",2000);
h_3->SetFillColor(kGreen);
hs->Add(h_3);
h_4->FillRandom("nbtags_4j/nbtags_4j_Multiboson",3000);
h_4->SetFillColor(kBlack);
hs->Add(h_4);
h_5->FillRandom("nbtags_4j/nbtags_4j_t#bar{t}+V",7000);
h_5->SetFillColor(kYellow);
hs->Add(h_5);
hs->Draw("stack");
TCanvas*c1=new TCanvas("c1","stacked hists",700,900);
c1->Divide (1,2);
c1->cd(1);
hs->Draw();
c1->cd(2);
hs->Draw("stack");
}
Waiting for your kind answer.
Faiza Naveed