+/* $Id$ */
+
#include "dNdEtaAnalysis.h"
+#include <TFile.h>
+#include <TH2F.h>
+#include <TH1D.h>
+#include <TMath.h>
+#include <TCanvas.h>
+#include <TCollection.h>
+#include <TIterator.h>
+#include <TList.h>
+#include <TLegend.h>
+
+#include "dNdEtaCorrection.h"
+
//____________________________________________________________________
ClassImp(dNdEtaAnalysis)
//____________________________________________________________________
-dNdEtaAnalysis::dNdEtaAnalysis(Char_t* name) {
+dNdEtaAnalysis::dNdEtaAnalysis(Char_t* name, Char_t* title) :
+ TNamed(name, title),
+ fEtaVsVtx(0),
+ fEtaVsVtxUncorrected(0),
+ fVtx(0)
+{
+ // constructor
+
+ fEtaVsVtx = new TH2F(Form("%s_eta_vs_vtx", name),"",80,-20,20,120,-6,6);
+ fEtaVsVtx->SetXTitle("vtx z [cm]");
+ fEtaVsVtx->SetYTitle("#eta");
+
+ fEtaVsVtxUncorrected = dynamic_cast<TH2F*> (fEtaVsVtx->Clone(Form("%s_eta_vs_vtx_uncorrected", name)));
+ fVtx = fEtaVsVtx->ProjectionX(Form("%s_vtx", name));
+ for (Int_t i=0; i<kVertexBinning; ++i)
+ {
+ fdNdEta[i] = fEtaVsVtx->ProjectionY(Form("%s_dNdEta_%d", name, i));
+ fdNdEta[i]->SetYTitle("dN/d#eta");
+ }
+
+ fEtaVsVtx->Sumw2();
+ fVtx->Sumw2();
+}
+
+//____________________________________________________________________
+dNdEtaAnalysis::~dNdEtaAnalysis()
+{
+ // destructor
+
+ delete fEtaVsVtx;
+ fEtaVsVtx = 0;
+
+ delete fEtaVsVtxUncorrected;
+ fEtaVsVtxUncorrected = 0;
+
+ delete fVtx;
+ fVtx = 0;
+
+ for (Int_t i=0; i<kVertexBinning; ++i)
+ {
+ delete fdNdEta[i];
+ fdNdEta[i] = 0;
+ }
+}
+
+//_____________________________________________________________________________
+dNdEtaAnalysis::dNdEtaAnalysis(const dNdEtaAnalysis &c) :
+ TNamed(c),
+ fEtaVsVtx(0),
+ fEtaVsVtxUncorrected(0),
+ fVtx(0)
+{
+ //
+ // dNdEtaAnalysis copy constructor
+ //
+
+ ((dNdEtaAnalysis &) c).Copy(*this);
+}
+
+//_____________________________________________________________________________
+dNdEtaAnalysis &dNdEtaAnalysis::operator=(const dNdEtaAnalysis &c)
+{
+ //
+ // Assignment operator
+ //
+
+ if (this != &c) ((dNdEtaAnalysis &) c).Copy(*this);
+ return *this;
+}
+
+//_____________________________________________________________________________
+void dNdEtaAnalysis::Copy(TObject &c) const
+{
+ //
+ // Copy function
+ //
- fName = TString(name);
+ dNdEtaAnalysis& target = (dNdEtaAnalysis &) c;
- hEtaVsVtx = new TH2F("eta_vs_vtx","",80,-20,20,120,-6,6);
- hVtx = (TH1F*)hEtaVsVtx->ProjectionX("vtx");
- hdNdEta = (TH1F*)hEtaVsVtx->ProjectionY("dNdEta");
-
- hEtaVsVtx->SetXTitle("vtx z [cm]");
- hEtaVsVtx->SetYTitle("#eta");
- hVtx->SetXTitle("vtx z [cm]");
- hdNdEta->SetXTitle("#eta");
- hdNdEta->SetYTitle("dN/d#eta");
+ target.fEtaVsVtx = dynamic_cast<TH2F*> (fEtaVsVtx->Clone());
+ target.fEtaVsVtxUncorrected = dynamic_cast<TH2F*> (fEtaVsVtxUncorrected->Clone());
+ target.fVtx = dynamic_cast<TH1D*> (fVtx->Clone());
- hEtaVsVtx->Sumw2();
- hVtx->Sumw2();
+ for (Int_t i=0; i<kVertexBinning; ++i)
+ target.fdNdEta[i] = dynamic_cast<TH1D*> (fdNdEta[i]->Clone());
+ TNamed::Copy((TNamed &) c);
}
//____________________________________________________________________
-void
-dNdEtaAnalysis::FillTrack(Float_t vtx, Float_t eta, Float_t weight) {
- hEtaVsVtx->Fill(vtx, eta, weight);
+void dNdEtaAnalysis::FillTrack(Float_t vtx, Float_t eta)
+{
+ // fills a track into the histograms
+
+ fEtaVsVtxUncorrected->Fill(vtx,eta);
}
//____________________________________________________________________
-void
-dNdEtaAnalysis::FillEvent(Float_t vtx) {
- hVtx->Fill(vtx);
+void dNdEtaAnalysis::FillEvent(Float_t vtx)
+{
+ // fills an event into the histograms
+
+ fVtx->Fill(vtx);
}
//____________________________________________________________________
-void
-dNdEtaAnalysis::Finish() {
-
- // first normalize with n events (per vtx)
- for (Int_t i_vtx=0; i_vtx<=hVtx->GetNbinsX(); i_vtx++) {
- Float_t nEvents = hVtx->GetBinContent(i_vtx);
- Float_t nEventsError = hVtx->GetBinError(i_vtx);
-
- if (nEvents==0) continue;
-
- for (Int_t i_eta=0; i_eta<=hEtaVsVtx->GetNbinsY(); i_eta++) {
- Float_t value = hEtaVsVtx->GetBinContent(i_vtx, i_eta)/nEvents;
- if (value==0) continue;
- Float_t error = hEtaVsVtx->GetBinError(i_vtx, i_eta)/nEvents;
- error = TMath::Sqrt(TMath::Power(hEtaVsVtx->GetBinError(i_vtx, i_eta)/
- hEtaVsVtx->GetBinContent(i_vtx, i_eta),2) +
- TMath::Power(nEventsError/nEvents,2));
- hEtaVsVtx->SetBinContent(i_vtx, i_eta, value);
- hEtaVsVtx->SetBinError(i_vtx, i_eta, error);
+void dNdEtaAnalysis::Finish(dNdEtaCorrection* correction)
+{
+ // correct with correction values if available
+
+ // TODO what do we do with the error?
+ if (!correction)
+ printf("INFO: No correction applied\n");
+
+ // this can be replaced by TH2F::Divide if we agree that the binning will be always the same
+ for (Int_t iVtx=0; iVtx<=fEtaVsVtxUncorrected->GetNbinsX(); iVtx++)
+ {
+ for (Int_t iEta=0; iEta<=fEtaVsVtxUncorrected->GetNbinsY(); iEta++)
+ {
+ Float_t correctionValue = 1;
+ if (correction)
+ correctionValue = correction->GetCorrection(fEtaVsVtxUncorrected->GetXaxis()->GetBinCenter(iVtx), fEtaVsVtxUncorrected->GetYaxis()->GetBinCenter(iEta));
+
+ Float_t value = fEtaVsVtxUncorrected->GetBinContent(iVtx, iEta);
+ Float_t error = fEtaVsVtxUncorrected->GetBinError(iVtx, iEta);
+
+ Float_t correctedValue = value * correctionValue;
+ Float_t correctedError = error * correctionValue;
+
+ if (correctedValue != 0)
+ {
+ fEtaVsVtx->SetBinContent(iVtx, iEta, correctedValue);
+ fEtaVsVtx->SetBinError(iVtx, iEta, correctedError);
+ }
}
}
- // then take the wieghted average for each eta
- // is this the right way to do it???
- for (Int_t i_eta=0; i_eta<=hEtaVsVtx->GetNbinsY(); i_eta++) {
- Float_t sum = 0;
- Float_t sumError2 = 0;
- Int_t nMeasurements = 0;
-
- Float_t sum_xw = 0;
- Float_t sum_w = 0;
-
- for (Int_t i_vtx=0; i_vtx<=hVtx->GetNbinsX(); i_vtx++) {
- if (hVtx->GetBinContent(i_vtx)==0) continue;
- if (hEtaVsVtx->GetBinContent(i_vtx, i_eta)==0) continue;
-
- Float_t w = 1/TMath::Power(hEtaVsVtx->GetBinError(i_vtx, i_eta),2);
- sum_xw = sum_xw + hEtaVsVtx->GetBinContent(i_vtx, i_eta)*w;
- sum_w = sum_w + w;
-
- sum = sum + hEtaVsVtx->GetBinContent(i_vtx, i_eta);
- sumError2 = sumError2 + TMath::Power(hEtaVsVtx->GetBinError(i_vtx, i_eta),2);
- nMeasurements++;
- }
- Float_t dndeta = 0;
- Float_t error = 0;
+ for (Int_t iEta=0; iEta<=fEtaVsVtx->GetNbinsY(); iEta++)
+ {
+ // do we have several histograms for different vertex positions?
+ Int_t vertexBinWidth = fVtx->GetNbinsX() / (kVertexBinning-1);
+ for (Int_t vertexPos=0; vertexPos<kVertexBinning; ++vertexPos)
+ {
+ Int_t vertexBinBegin = 1;
+ Int_t vertexBinEnd = fVtx->GetNbinsX() + 1;
- if (nMeasurements!=0) {
- dndeta = sum/Float_t(nMeasurements);
- error = TMath::Sqrt(sumError2)/Float_t(nMeasurements);
-
- dndeta = sum_xw/sum_w;
- error = 1/TMath::Sqrt(sum_w);
+ // the first histogram is always for the whole vertex range
+ if (vertexPos > 0)
+ {
+ vertexBinBegin = 1 + vertexBinWidth * (vertexPos-1);
+ vertexBinEnd = vertexBinBegin + vertexBinWidth;
+ }
- dndeta = dndeta/hdNdEta->GetBinWidth(i_eta);
- error = error/hdNdEta->GetBinWidth(i_eta);
+ Float_t totalEvents = fVtx->Integral(vertexBinBegin, vertexBinEnd - 1);
+ if (totalEvents == 0)
+ {
+ printf("WARNING: No events for hist %d %d %d\n", vertexPos, vertexBinBegin, vertexBinEnd);
+ continue;
+ }
- hdNdEta->SetBinContent(i_eta, dndeta);
- hdNdEta->SetBinError(i_eta, error);
- }
+ Float_t sum = 0;
+ Float_t sumError2 = 0;
+ for (Int_t iVtx = vertexBinBegin; iVtx < vertexBinEnd; iVtx++)
+ {
+ if (fEtaVsVtx->GetBinContent(iVtx, iEta) != 0)
+ {
+ sum = sum + fEtaVsVtx->GetBinContent(iVtx, iEta);
+ sumError2 = sumError2 + TMath::Power(fEtaVsVtx->GetBinError(iVtx, iEta),2);
+ }
+ }
+ Float_t dndeta = sum / totalEvents;
+ Float_t error = TMath::Sqrt(sumError2) / totalEvents;
+
+ dndeta = dndeta/fdNdEta[vertexPos]->GetBinWidth(iEta);
+ error = error/fdNdEta[vertexPos]->GetBinWidth(iEta);
+
+ fdNdEta[vertexPos]->SetBinContent(iEta, dndeta);
+ fdNdEta[vertexPos]->SetBinError(iEta, error);
+ }
}
}
+//____________________________________________________________________
+void dNdEtaAnalysis::SaveHistograms()
+{
+ // save the histograms to a directory with the name of this class (retrieved from TNamed)
+ gDirectory->mkdir(GetName());
+ gDirectory->cd(GetName());
-//____________________________________________________________________
-void
-dNdEtaAnalysis::SaveHistograms() {
+ fEtaVsVtx ->Write();
+ fEtaVsVtxUncorrected->Write();
+ fVtx ->Write();
+ for (Int_t i=0; i<kVertexBinning; ++i)
+ fdNdEta[i] ->Write();
+
+ gDirectory->cd("../");
+}
+
+void dNdEtaAnalysis::LoadHistograms()
+{
+ // loads the histograms from a directory with the name of this class (retrieved from TNamed)
- gDirectory->mkdir(fName.Data());
- gDirectory->cd(fName.Data());
-
- hEtaVsVtx ->Write();
- hVtx ->Write();
- hdNdEta ->Write();
+ gDirectory->cd(GetName());
+
+ fEtaVsVtx = dynamic_cast<TH2F*> (gDirectory->Get(fEtaVsVtx->GetName()));
+ fEtaVsVtxUncorrected = dynamic_cast<TH2F*> (gDirectory->Get(fEtaVsVtxUncorrected->GetName()));
+
+ fVtx = dynamic_cast<TH1D*> (gDirectory->Get(fVtx->GetName()));
+
+ for (Int_t i=0; i<kVertexBinning; ++i)
+ fdNdEta[i] = dynamic_cast<TH1D*> (gDirectory->Get(fdNdEta[i]->GetName()));
gDirectory->cd("../");
}
+//____________________________________________________________________
+void dNdEtaAnalysis::DrawHistograms()
+{
+ // draws the histograms
+
+ TCanvas* canvas = new TCanvas("dNdEtaAnalysis", "dNdEtaAnalysis", 800, 800);
+ canvas->Divide(2, 2);
+
+ canvas->cd(1);
+ if (fEtaVsVtx)
+ fEtaVsVtx->Draw("COLZ");
+
+ canvas->cd(2);
+ if (fEtaVsVtxUncorrected)
+ fEtaVsVtxUncorrected->Draw("COLZ");
+
+ canvas->cd(3);
+ if (fVtx)
+ fVtx->Draw();
+
+ canvas->cd(4);
+ if (fdNdEta[0])
+ fdNdEta[0]->Draw();
+
+ // histograms for different vertices?
+ if (kVertexBinning > 0)
+ {
+ // doesnt work, but i dont get it, giving up...
+ /*TCanvas* canvas2 =*/ new TCanvas("dNdEtaAnalysisVtx", "dNdEtaAnalysisVtx", 450, 450);
+ //Int_t yPads = (Int_t) TMath::Ceil(((Double_t) kVertexBinning - 1) / 2);
+ //printf("%d\n", yPads);
+ //canvas2->Divide(2, yPads);
+
+ TLegend* legend = new TLegend(0.7, 0.7, 0.9, 0.9);
+
+ for (Int_t i=0; i<kVertexBinning; ++i)
+ {
+ //canvas2->cd(i-1);
+ //printf("%d\n", i);
+ if (fdNdEta[i])
+ {
+ fdNdEta[i]->SetLineColor(i+1);
+ fdNdEta[i]->Draw((i == 0) ? "" : "SAME");
+ legend->AddEntry(fdNdEta[i], (i == 0) ? "Vtx All" : Form("Vtx Bin %d", i-1));
+ }
+ }
+
+ legend->Draw();
+ }
+}
+
+Long64_t dNdEtaAnalysis::Merge(TCollection* list)
+{
+ // Merges a list of dNdEtaAnalysis objects with this one.
+ // This is needed for PROOF.
+ // Returns the number of merged objects (including this)
+
+ if (!list)
+ return 0;
+
+ if (list->IsEmpty())
+ return 1;
+
+ TIterator* iter = list->MakeIterator();
+ TObject* obj;
+
+ // sub collections
+ const Int_t nCollections = kVertexBinning + 3;
+ TList* collections[nCollections];
+ for (Int_t i=0; i<nCollections; ++i)
+ collections[i] = new TList;
+
+ Int_t count = 0;
+ while ((obj = iter->Next()))
+ {
+ dNdEtaAnalysis* entry = dynamic_cast<dNdEtaAnalysis*> (obj);
+ if (entry == 0)
+ continue;
+
+ collections[0]->Add(entry->fEtaVsVtx);
+ collections[1]->Add(entry->fEtaVsVtxUncorrected);
+ collections[2]->Add(entry->fVtx);
+
+ for (Int_t i=0; i<kVertexBinning; ++i)
+ collections[3+i]->Add(entry->fdNdEta[i]);
+
+ ++count;
+ }
+
+ fEtaVsVtx->Merge(collections[0]);
+ fEtaVsVtxUncorrected->Merge(collections[1]);
+ fVtx->Merge(collections[2]);
+ for (Int_t i=0; i<kVertexBinning; ++i)
+ fdNdEta[i]->Merge(collections[3+i]);
+
+ for (Int_t i=0; i<nCollections; ++i)
+ delete collections[i];
+
+ return count+1;
+}
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff