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plotEfficiency.C
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plotEfficiency.C
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/* ************************************************** *
* Not so simple macro for plotting of invarant mass *
* of the Lambda_c baryon from an ntuple *
* ************************************************** */
#include <iostream>
#include <cmath>
#include "TStyle.h"
#include "TCanvas.h"
#include "TH1D.h"
#include "TFile.h"
#include "TNtuple.h"
#include "TCut.h"
#include "TF1.h"
#include "TLegend.h"
#include "TColor.h"
#include "TROOT.h"
#include "TText.h"
#include "TString.h"
#include "TGraph.h"
#include "TGraphAsymmErrors.h"
#include "TVectorD.h"
using std::cout;
using std::endl;
// -- binning
const int nBin = 1;
float ptBin[nBin+1] = {3., 6.};
const float firstCent = 0;
const float lastCent = 6;
//--------------------------------------------------
float addErrors(float first, float second)
{
return sqrt(first*first + second*second);
}
//--------------------------------------------------
void plotEfficiency()
{
// -- style
gStyle->SetOptStat(0);
gStyle->SetLabelFont(132, "x");
gStyle->SetLabelFont(132, "y");
gStyle->SetTitleFont(132, "x");
gStyle->SetTitleFont(132, "y");
gStyle->SetLegendFont(132);
string outFileName = "efficiency_result_10-60cent.root";
TFile *outFile = new TFile(outFileName.c_str(), "recreate");
TCanvas *Ceff = new TCanvas("Ceff", "Efficiency", 400, 600);
TCanvas *CtpcRatio = new TCanvas("CtpcRatio", "TPC ratio", 400, 600);
TCanvas *ChftRatio = new TCanvas("ChftRatio", "HFT ratio", 400, 600);
// -- efficiencies
double effX[nBin], effY[nBin], effXL[nBin], effXH[nBin], effYL[nBin], effYH[nBin];
double tpcRatioX[nBin], tpcRatioY[nBin], tpcRatioXL[nBin], tpcRatioXH[nBin], tpcRatioYL[nBin], tpcRatioYH[nBin];
double hftRatioX[nBin], hftRatioY[nBin], hftRatioXL[nBin], hftRatioXH[nBin], hftRatioYL[nBin], hftRatioYH[nBin];
for(int iBin = 0; iBin < nBin; ++iBin)
{
effY[iBin] = 0;
effYL[iBin] = 0;
effYH[iBin] = 0;
tpcRatioY[iBin] = 0;
tpcRatioYL[iBin] = 0;
tpcRatioYH[iBin] = 0;
hftRatioY[iBin] = 0;
hftRatioYL[iBin] = 0;
hftRatioYH[iBin] = 0;
}
float Ncoll[9] = {13.7, 30.6, 64., 124., 222.6, 375.9, 606.9, 852.8, 1066.5};
for(int iBin = 0; iBin < nBin; ++iBin)
{
float NcollTotal = 0;
for(int iCent = firstCent; iCent <= lastCent; ++iCent)
{
TFile *f = new TFile(Form("efficiencies/efficiency_cent%d.root", iCent));
TGraphAsymmErrors *effInc = static_cast<TGraphAsymmErrors*>(f->Get("Graph;1"));
TGraphAsymmErrors *tpcRatioInc = static_cast<TGraphAsymmErrors*>(f->Get("Graph;2"));
TGraphAsymmErrors *hftRatioInc = static_cast<TGraphAsymmErrors*>(f->Get("Graph;3"));
NcollTotal+=Ncoll[iCent];
int start = ptBin[iBin] - 2;
for(int iX = 0; iX < ptBin[iBin+1]-ptBin[iBin]; ++iX)
{
const int i = start + iX;
const float normalization = Ncoll[iCent]/(ptBin[iBin+1]-ptBin[iBin]);
double x, y;
effInc->GetPoint(i, x, y);
effY[iBin] += y * normalization;
tpcRatioInc->GetPoint(i, x, y);
tpcRatioY[iBin] += y * normalization;
hftRatioInc->GetPoint(i, x, y);
hftRatioY[iBin] += y * normalization;
effYL[iBin] = addErrors(effYL[iBin], effInc->GetErrorYlow(i)*normalization);
effYH[iBin] = addErrors(effYH[iBin], effInc->GetErrorYhigh(i)*normalization);
tpcRatioYL[iBin] = addErrors(tpcRatioYL[iBin], tpcRatioInc->GetErrorYlow(i)*normalization);
tpcRatioYH[iBin] = addErrors(tpcRatioYH[iBin], tpcRatioInc->GetErrorYhigh(i)*normalization);
hftRatioYL[iBin] = addErrors(hftRatioYL[iBin], hftRatioInc->GetErrorYlow(i)*normalization);
hftRatioYH[iBin] = addErrors(hftRatioYH[iBin], hftRatioInc->GetErrorYhigh(i)*normalization);
}
f->Close();
}
effY[iBin] *= 1./NcollTotal;
effYL[iBin] *= 1./NcollTotal;
effYH[iBin] *= 1./NcollTotal;
tpcRatioY[iBin] *= 1./NcollTotal;
tpcRatioYL[iBin] *= 1./NcollTotal;
tpcRatioYH[iBin] *= 1./NcollTotal;
hftRatioY[iBin] *= 1./NcollTotal;
hftRatioYL[iBin] *= 1./NcollTotal;
hftRatioYH[iBin] *= 1./NcollTotal;
}
// -- set x bins
for(int i = 0; i < nBin; ++i)
{
float halfBinWidth = (ptBin[i+1] - ptBin[i])/2.;
float binMean = ptBin[i] + halfBinWidth;
effX[i] = binMean;
tpcRatioX[i] = binMean;
hftRatioX[i] = binMean;
effXL[i] = halfBinWidth;
effXH[i] = halfBinWidth;
tpcRatioXL[i] = halfBinWidth;
tpcRatioXH[i] = halfBinWidth;
hftRatioXL[i] = halfBinWidth;
hftRatioXH[i] = halfBinWidth;
}
// -- Make TGraphAsymmErrors
TGraphAsymmErrors* eff = new TGraphAsymmErrors(nBin, effX, effY, effXL, effXH, effYL, effYH);
TGraphAsymmErrors* tpcRatio = new TGraphAsymmErrors(nBin, tpcRatioX, tpcRatioY, tpcRatioXL, tpcRatioXH, tpcRatioYL, tpcRatioYH);
TGraphAsymmErrors* hftRatio = new TGraphAsymmErrors(nBin, hftRatioX, hftRatioY, hftRatioXL, hftRatioXH, hftRatioYL, hftRatioYH);
// -- Drawing
string centralityMarker = " 10-60%";
eff->SetTitle(Form("efficiency%s", centralityMarker.c_str()));
tpcRatio->SetTitle(Form("TPC efficiency%s", centralityMarker.c_str()));
hftRatio->SetTitle(Form("HFT efficiency%s", centralityMarker.c_str()));
eff->GetXaxis()->SetTitle("#font[12]{p}_{T} (GeV/#font[12]{c})");
tpcRatio->GetXaxis()->SetTitle("#font[12]{p}_{T} (GeV/#font[12]{c})");
hftRatio->GetXaxis()->SetTitle("#font[12]{p}_{T} (GeV/#font[12]{c})");
Ceff->cd();
// Ceff->SetLogy();
eff->SetMarkerStyle(20);
eff->Draw("ap");
CtpcRatio->cd();
// CtpcRatio->SetLogy();
tpcRatio->SetMarkerStyle(20);
tpcRatio->Draw("ap");
ChftRatio->cd();
// ChftRatio->SetLogy();
hftRatio->SetMarkerStyle(20);
hftRatio->Draw("ap");
// saving
cout << "Writing into file " << outFileName << endl;
outFile->cd();
eff->Write();
tpcRatio->Write();
hftRatio->Write();
}