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#include "Riostream.h"
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#include <fstream>
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#include <iomanip>
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#include <vector>
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#include <string>
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void MakeHLT(){
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gROOT->Reset();
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gStyle->SetOptStat(0);
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ifstream data;
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float value;
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string name = "HLT"; //name withtout .txt
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data.open((name+".txt").c_str());
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string label;
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float eff;
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float err;
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float exp;
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float obs;
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const int N = 101;
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TH1F * histo = new TH1F("histo",name.c_str(),91,0.5,91+0.5);
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int bin = 0;
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while(!data.eof() && bin<90){
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bin++;
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data >>label>>obs>>exp;
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histo->GetXaxis()->SetBinLabel(bin,label.c_str());
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cout<<label<<" "<<obs<<" "<<exp<<endl;
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if(exp!=0){
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eff = obs/exp;
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err = sqrt(eff*(1-eff)/exp);
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histo->SetBinContent(bin,eff);
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histo->SetBinError(bin,err);
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}
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}
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TCanvas * Ca0 = new TCanvas("Ca0","Canvas",1200,800);
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Ca0->SetBottomMargin(0.45);
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histo->Draw();
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histo->SetMaximum(1.1);
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histo->SetMinimum(0.);
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histo->GetXaxis()->LabelsOption("v");
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histo->SetLabelSize(0.02);
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histo->GetYaxis()->SetTitle("Efficiency(%)");
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Ca0->SaveAs((name+".png").c_str());
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exit(0);
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}
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