3 #include "AlidNdEtaCorrection.h"
9 //____________________________________________________________________
10 ClassImp(AlidNdEtaCorrection)
12 //____________________________________________________________________
13 AlidNdEtaCorrection::AlidNdEtaCorrection(Char_t* name)
21 fTrack2ParticleCorrection = new AliCorrectionMatrix3D("nTrackToNPart", "nTrackToNPart",80,-20,20,120,-6,6, 100, 0, 10);
23 Float_t binLimitsN[] = {-0.5, 0.5, 1.5, 2.5, 3.5, 4.5, 5.5, 6.5, 7.5, 8.5, 9.5,
24 10.5, 12.5, 14.5, 16.5, 18.5, 20.5, 25.5, 30.5, 40.5, 50.5, 100.5, 300.5};
25 Float_t binLimitsVtx[] = {-20,-15,-10,-6,-3,0,3,6,10,15,20};
27 fVertexRecoCorrection = new AliCorrectionMatrix2D("vtxReco", "vtxReco",10,binLimitsVtx ,22,binLimitsN);
29 fTriggerBiasCorrection = new AliCorrectionMatrix2D("triggerBias", "triggerBias",120,-6,6,100, 0, 10);
31 fTrack2ParticleCorrection ->SetAxisTitles("vtx z [cm]", "#eta", "p_{T}");
32 fVertexRecoCorrection ->SetAxisTitles("vtx z [cm]", "n particles/tracks/tracklets?");
34 fTriggerBiasCorrection ->SetAxisTitles("#eta", "p_{T} [GeV/c]");
37 //____________________________________________________________________
39 AlidNdEtaCorrection::Finish() {
43 // divide the histograms in the AliCorrectionMatrix2D objects to get the corrections
46 fTrack2ParticleCorrection->Divide();
48 fVertexRecoCorrection->Divide();
50 fTriggerBiasCorrection->GetMeasuredHistogram()->Scale(Double_t(fNTriggeredEvents)/Double_t(fNEvents));
51 fTriggerBiasCorrection->Divide();
55 //____________________________________________________________________
57 AlidNdEtaCorrection::Merge(TCollection* list) {
58 // Merge a list of dNdEtaCorrection objects with this (needed for
60 // Returns the number of merged objects (including this).
68 TIterator* iter = list->MakeIterator();
71 // collections of measured and generated histograms
72 TList* collectionNtrackToNparticle = new TList;
73 TList* collectionVertexReco = new TList;
74 TList* collectionTriggerBias = new TList;
77 while ((obj = iter->Next())) {
79 AlidNdEtaCorrection* entry = dynamic_cast<AlidNdEtaCorrection*> (obj);
83 collectionNtrackToNparticle ->Add(entry->GetTrack2ParticleCorrection());
84 collectionVertexReco ->Add(entry->GetVertexRecoCorrection());
85 collectionTriggerBias ->Add(entry->GetTriggerBiasCorrection());
89 fTrack2ParticleCorrection ->Merge(collectionNtrackToNparticle);
90 fVertexRecoCorrection ->Merge(collectionVertexReco);
91 fTriggerBiasCorrection ->Merge(collectionTriggerBias);
93 delete collectionNtrackToNparticle;
94 delete collectionVertexReco;
95 delete collectionTriggerBias;
101 //____________________________________________________________________
103 AlidNdEtaCorrection::LoadHistograms(Char_t* fileName, Char_t* dir) {
105 // loads the histograms
108 fTrack2ParticleCorrection ->LoadHistograms(fileName, dir);
109 fVertexRecoCorrection ->LoadHistograms(fileName, dir);
110 fTriggerBiasCorrection ->LoadHistograms(fileName, dir);
116 //____________________________________________________________________
118 AlidNdEtaCorrection::SaveHistograms() {
120 // save the histograms
123 gDirectory->mkdir(fName.Data());
124 gDirectory->cd(fName.Data());
126 fTrack2ParticleCorrection ->SaveHistograms();
127 fVertexRecoCorrection ->SaveHistograms();
128 fTriggerBiasCorrection ->SaveHistograms();
130 gDirectory->cd("../");
133 //____________________________________________________________________
134 void AlidNdEtaCorrection::DrawHistograms()
137 // call the draw histogram method of the two AliCorrectionMatrix2D objects
139 fTrack2ParticleCorrection ->DrawHistograms();
140 fVertexRecoCorrection ->DrawHistograms();
141 fTriggerBiasCorrection ->DrawHistograms();
145 //____________________________________________________________________
146 Float_t AlidNdEtaCorrection::GetMeasuredFraction(Float_t ptCutOff, Float_t eta, Bool_t debug)
148 // calculates the fraction of particles measured (some are missed due to the pt cut off)
149 // uses the generated particle histogram from fTrack2ParticleCorrection
151 TH3F* generated = fTrack2ParticleCorrection->GetGeneratedHistogram();
153 // find eta borders, if eta is negative assume -0.8 ... 0.8
158 etaBegin = generated->GetYaxis()->FindBin(-0.8);
159 etaEnd = generated->GetYaxis()->FindBin(0.8);
163 etaBegin = generated->GetYaxis()->FindBin(eta);
167 Int_t vertexBegin = generated->GetXaxis()->FindBin(-10);
168 Int_t vertexEnd = generated->GetXaxis()->FindBin(10);
170 TH1D* ptProj = dynamic_cast<TH1D*> (generated->ProjectionZ(Form("%s_pt", GetName()), vertexBegin, vertexEnd, etaBegin, etaEnd));
172 Int_t ptBin = ptProj->FindBin(ptCutOff);
173 Float_t abovePtCut = ptProj->Integral(ptBin, ptProj->GetNbinsX());
174 Float_t all = ptProj->Integral();
179 Float_t fraction = abovePtCut / all;