3 #include "dNdEtaAnalysis.h"
10 #include <TCollection.h>
11 #include <TIterator.h>
15 #include "dNdEtaCorrection.h"
17 //____________________________________________________________________
18 ClassImp(dNdEtaAnalysis)
20 //____________________________________________________________________
21 dNdEtaAnalysis::dNdEtaAnalysis(Char_t* name, Char_t* title) :
24 fEtaVsVtxUncorrected(0),
29 fEtaVsVtx = new TH2F(Form("%s_eta_vs_vtx", name),"",80,-20,20,120,-6,6);
30 fEtaVsVtx->SetXTitle("vtx z [cm]");
31 fEtaVsVtx->SetYTitle("#eta");
33 fEtaVsVtxUncorrected = dynamic_cast<TH2F*> (fEtaVsVtx->Clone(Form("%s_eta_vs_vtx_uncorrected", name)));
34 fVtx = fEtaVsVtx->ProjectionX(Form("%s_vtx", name));
35 for (Int_t i=0; i<kVertexBinning; ++i)
37 fdNdEta[i] = fEtaVsVtx->ProjectionY(Form("%s_dNdEta_%d", name, i));
38 fdNdEta[i]->SetYTitle("dN/d#eta");
45 //____________________________________________________________________
46 dNdEtaAnalysis::~dNdEtaAnalysis()
53 delete fEtaVsVtxUncorrected;
54 fEtaVsVtxUncorrected = 0;
59 for (Int_t i=0; i<kVertexBinning; ++i)
66 //_____________________________________________________________________________
67 dNdEtaAnalysis::dNdEtaAnalysis(const dNdEtaAnalysis &c) :
70 fEtaVsVtxUncorrected(0),
74 // dNdEtaAnalysis copy constructor
77 ((dNdEtaAnalysis &) c).Copy(*this);
80 //_____________________________________________________________________________
81 dNdEtaAnalysis &dNdEtaAnalysis::operator=(const dNdEtaAnalysis &c)
84 // Assignment operator
87 if (this != &c) ((dNdEtaAnalysis &) c).Copy(*this);
91 //_____________________________________________________________________________
92 void dNdEtaAnalysis::Copy(TObject &c) const
98 dNdEtaAnalysis& target = (dNdEtaAnalysis &) c;
100 target.fEtaVsVtx = dynamic_cast<TH2F*> (fEtaVsVtx->Clone());
101 target.fEtaVsVtxUncorrected = dynamic_cast<TH2F*> (fEtaVsVtxUncorrected->Clone());
102 target.fVtx = dynamic_cast<TH1D*> (fVtx->Clone());
104 for (Int_t i=0; i<kVertexBinning; ++i)
105 target.fdNdEta[i] = dynamic_cast<TH1D*> (fdNdEta[i]->Clone());
107 TNamed::Copy((TNamed &) c);
110 //____________________________________________________________________
111 void dNdEtaAnalysis::FillTrack(Float_t vtx, Float_t eta)
113 // fills a track into the histograms
115 fEtaVsVtxUncorrected->Fill(vtx,eta);
118 //____________________________________________________________________
119 void dNdEtaAnalysis::FillEvent(Float_t vtx)
121 // fills an event into the histograms
126 //____________________________________________________________________
127 void dNdEtaAnalysis::Finish(dNdEtaCorrection* correction)
129 // correct with correction values if available
131 // TODO what do we do with the error?
133 printf("INFO: No correction applied\n");
135 // this can be replaced by TH2F::Divide if we agree that the binning will be always the same
136 for (Int_t iVtx=0; iVtx<=fEtaVsVtxUncorrected->GetNbinsX(); iVtx++)
138 for (Int_t iEta=0; iEta<=fEtaVsVtxUncorrected->GetNbinsY(); iEta++)
140 Float_t correctionValue = 1;
142 correctionValue = correction->GetCorrection(fEtaVsVtxUncorrected->GetXaxis()->GetBinCenter(iVtx), fEtaVsVtxUncorrected->GetYaxis()->GetBinCenter(iEta));
144 Float_t value = fEtaVsVtxUncorrected->GetBinContent(iVtx, iEta);
145 Float_t error = fEtaVsVtxUncorrected->GetBinError(iVtx, iEta);
147 Float_t correctedValue = value * correctionValue;
148 Float_t correctedError = error * correctionValue;
150 if (correctedValue != 0)
152 fEtaVsVtx->SetBinContent(iVtx, iEta, correctedValue);
153 fEtaVsVtx->SetBinError(iVtx, iEta, correctedError);
158 for (Int_t iEta=0; iEta<=fEtaVsVtx->GetNbinsY(); iEta++)
160 // do we have several histograms for different vertex positions?
161 Int_t vertexBinWidth = fVtx->GetNbinsX() / (kVertexBinning-1);
162 for (Int_t vertexPos=0; vertexPos<kVertexBinning; ++vertexPos)
164 Int_t vertexBinBegin = 1;
165 Int_t vertexBinEnd = fVtx->GetNbinsX() + 1;
167 // the first histogram is always for the whole vertex range
170 vertexBinBegin = 1 + vertexBinWidth * (vertexPos-1);
171 vertexBinEnd = vertexBinBegin + vertexBinWidth;
174 Float_t totalEvents = fVtx->Integral(vertexBinBegin, vertexBinEnd - 1);
175 if (totalEvents == 0)
177 printf("WARNING: No events for hist %d %d %d\n", vertexPos, vertexBinBegin, vertexBinEnd);
182 Float_t sumError2 = 0;
183 for (Int_t iVtx = vertexBinBegin; iVtx < vertexBinEnd; iVtx++)
185 if (fEtaVsVtx->GetBinContent(iVtx, iEta) != 0)
187 sum = sum + fEtaVsVtx->GetBinContent(iVtx, iEta);
188 sumError2 = sumError2 + TMath::Power(fEtaVsVtx->GetBinError(iVtx, iEta),2);
192 Float_t dndeta = sum / totalEvents;
193 Float_t error = TMath::Sqrt(sumError2) / totalEvents;
195 dndeta = dndeta/fdNdEta[vertexPos]->GetBinWidth(iEta);
196 error = error/fdNdEta[vertexPos]->GetBinWidth(iEta);
198 fdNdEta[vertexPos]->SetBinContent(iEta, dndeta);
199 fdNdEta[vertexPos]->SetBinError(iEta, error);
204 //____________________________________________________________________
205 void dNdEtaAnalysis::SaveHistograms()
207 // save the histograms to a directory with the name of this class (retrieved from TNamed)
209 gDirectory->mkdir(GetName());
210 gDirectory->cd(GetName());
213 fEtaVsVtxUncorrected->Write();
215 for (Int_t i=0; i<kVertexBinning; ++i)
216 fdNdEta[i] ->Write();
218 gDirectory->cd("../");
221 void dNdEtaAnalysis::LoadHistograms()
223 // loads the histograms from a directory with the name of this class (retrieved from TNamed)
225 gDirectory->cd(GetName());
227 fEtaVsVtx = dynamic_cast<TH2F*> (gDirectory->Get(fEtaVsVtx->GetName()));
228 fEtaVsVtxUncorrected = dynamic_cast<TH2F*> (gDirectory->Get(fEtaVsVtxUncorrected->GetName()));
230 fVtx = dynamic_cast<TH1D*> (gDirectory->Get(fVtx->GetName()));
232 for (Int_t i=0; i<kVertexBinning; ++i)
233 fdNdEta[i] = dynamic_cast<TH1D*> (gDirectory->Get(fdNdEta[i]->GetName()));
235 gDirectory->cd("../");
238 //____________________________________________________________________
239 void dNdEtaAnalysis::DrawHistograms()
241 // draws the histograms
243 TCanvas* canvas = new TCanvas("dNdEtaAnalysis", "dNdEtaAnalysis", 800, 800);
244 canvas->Divide(2, 2);
248 fEtaVsVtx->Draw("COLZ");
251 if (fEtaVsVtxUncorrected)
252 fEtaVsVtxUncorrected->Draw("COLZ");
262 // histograms for different vertices?
263 if (kVertexBinning > 0)
265 // doesnt work, but i dont get it, giving up...
266 /*TCanvas* canvas2 =*/ new TCanvas("dNdEtaAnalysisVtx", "dNdEtaAnalysisVtx", 450, 450);
267 //Int_t yPads = (Int_t) TMath::Ceil(((Double_t) kVertexBinning - 1) / 2);
268 //printf("%d\n", yPads);
269 //canvas2->Divide(2, yPads);
271 TLegend* legend = new TLegend(0.7, 0.7, 0.9, 0.9);
273 for (Int_t i=0; i<kVertexBinning; ++i)
279 fdNdEta[i]->SetLineColor(i+1);
280 fdNdEta[i]->Draw((i == 0) ? "" : "SAME");
281 legend->AddEntry(fdNdEta[i], (i == 0) ? "Vtx All" : Form("Vtx Bin %d", i-1));
289 Long64_t dNdEtaAnalysis::Merge(TCollection* list)
291 // Merges a list of dNdEtaAnalysis objects with this one.
292 // This is needed for PROOF.
293 // Returns the number of merged objects (including this)
301 TIterator* iter = list->MakeIterator();
305 const Int_t nCollections = kVertexBinning + 3;
306 TList* collections[nCollections];
307 for (Int_t i=0; i<nCollections; ++i)
308 collections[i] = new TList;
311 while ((obj = iter->Next()))
313 dNdEtaAnalysis* entry = dynamic_cast<dNdEtaAnalysis*> (obj);
317 collections[0]->Add(entry->fEtaVsVtx);
318 collections[1]->Add(entry->fEtaVsVtxUncorrected);
319 collections[2]->Add(entry->fVtx);
321 for (Int_t i=0; i<kVertexBinning; ++i)
322 collections[3+i]->Add(entry->fdNdEta[i]);
327 fEtaVsVtx->Merge(collections[0]);
328 fEtaVsVtxUncorrected->Merge(collections[1]);
329 fVtx->Merge(collections[2]);
330 for (Int_t i=0; i<kVertexBinning; ++i)
331 fdNdEta[i]->Merge(collections[3+i]);
333 for (Int_t i=0; i<nCollections; ++i)
334 delete collections[i];