[u/mrichter/AliRoot.git] / PWGLF / SPECTRA / ChargedHadrons / dNdPt / AliPtResolAnalysisPbPb.cxx

/**************************************************************************
 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
 *                                                                        *
 * Author: The ALICE Off-line Project.                                    *
 * Contributors are mentioned in the code where appropriate.              *
 *                                                                        *
 * Permission to use, copy, modify and distribute this software and its   *
 * documentation strictly for non-commercial purposes is hereby granted   *
 * without fee, provided that the above copyright notice appears in all   *
 * copies and that both the copyright notice and this permission notice   *
 * appear in the supporting documentation. The authors make no claims     *
 * about the suitability of this software for any purpose. It is          *
 * provided "as is" without express or implied warranty.                  *
 **************************************************************************/
//------------------------------------------------------------------------------
// AliPtResolAnalysisPbPb class. 
// 
// a. functionality:
// - fills analysis control histograms
//
// b. data members:
// - control histograms
//
// Author: J.Otwinowski 04/11/2008 
//------------------------------------------------------------------------------

#include "TH1.h"
#include "TH2.h"
#include "TCanvas.h"
#include "THnSparse.h"

#include "AliHeader.h"  
#include "AliInputEventHandler.h"  
#include "AliAnalysisManager.h"  
#include "AliGenEventHeader.h"  
#include "AliStack.h"  
#include "AliESDEvent.h"  
#include "AliMCEvent.h"  
#include "AliESDtrackCuts.h"  
#include "AliLog.h" 
#include "AliMultiplicity.h"
#include "AliTracker.h"
#include "AliCentrality.h"

#include "AlidNdPtEventCuts.h"
#include "AlidNdPtAcceptanceCuts.h"
#include "AliPhysicsSelection.h"
#include "AliTriggerAnalysis.h"

#include "AliPWG0Helper.h"
#include "AlidNdPtHelper.h"
#include "AliPtResolAnalysisPbPb.h"


using namespace std;

ClassImp(AliPtResolAnalysisPbPb)

//_____________________________________________________________________________
  AliPtResolAnalysisPbPb::AliPtResolAnalysisPbPb(): AlidNdPt(),
  fAnalysisFolder(0),
  fTrackParamHist(0),
  fTrackParamHist2(0),
  fCentralityEstimator(0)
{
  // default constructor
  Init();
}

//_____________________________________________________________________________
AliPtResolAnalysisPbPb::AliPtResolAnalysisPbPb(Char_t* name, Char_t* title): AlidNdPt(name,title),
  fAnalysisFolder(0),
  fTrackParamHist(0),
  fTrackParamHist2(0),
  fCentralityEstimator(0)
{
  Init();
}

//_____________________________________________________________________________
AliPtResolAnalysisPbPb::~AliPtResolAnalysisPbPb() {
  //
  // destructor
  //
  if(fAnalysisFolder) delete fAnalysisFolder; fAnalysisFolder=0;
  if(fTrackParamHist) delete fTrackParamHist; fTrackParamHist=0;
  if(fTrackParamHist2) delete fTrackParamHist2; fTrackParamHist2=0;
}

//_____________________________________________________________________________
void AliPtResolAnalysisPbPb::Init(){
  //
  // Generic histograms to be corrected
  //
  //1/pT:#sigma(1/pT):centrality
  Int_t binsTrackParamHist[3]={400,300,11};
  Double_t minTrackParamHist[3]={0,0,0}; 
  Double_t maxTrackParamHist[3]={1,0.015,100};

  Double_t centrBins[12] = {0.0,5.,10.,20.,30.,40.,50.,60.,70.,80.,90.,100}; 


  fTrackParamHist = new THnSparseF("fTrackParamHist","1/pT:#sigma(1/pT):centrality",3,binsTrackParamHist,minTrackParamHist,maxTrackParamHist);
  fTrackParamHist->SetBinEdges(2,centrBins);
  fTrackParamHist->GetAxis(0)->SetTitle("1/pT (GeV/c)^{-1}");
  fTrackParamHist->GetAxis(1)->SetTitle("#sigma(1/pT)");
  fTrackParamHist->GetAxis(2)->SetTitle("centrality");
  fTrackParamHist->Sumw2();
  
  //pt:sigma(1/pT)*pT:centrality
  const Int_t ptNbins = 73;
  Double_t bins[74] = {0.0, 0.05, 0.1, 0.15, 0.2, 0.25, 0.3, 0.35, 0.4, 0.45, 0.5, 0.55, 0.6, 0.65, 0.7, 0.75, 0.8, 0.85, 0.9, 0.95, 1.0, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9, 2.0, 2.2, 2.4, 2.6, 2.8, 3.0, 3.2, 3.4, 3.6, 3.8, 4.0, 4.5, 5.0, 5.5, 6.0, 6.5, 7.0, 8.0, 9.0, 10.0, 11.0, 12.0, 13.0, 14.0, 15.0, 16.0, 18.0, 20.0, 22.0, 24.0, 26.0, 28.0, 30.0, 32.0, 34.0, 36.0, 40.0, 45.0, 50.0, 60.0, 70.0, 80.0, 90.0, 100.0 };

  Int_t binsTrackParamHist2[3]={ptNbins,200,11};
  Double_t minTrackParamHist2[3]={0,0,0}; 
  Double_t maxTrackParamHist2[3]={100,0.2,100};

  fTrackParamHist2 = new THnSparseF("fTrackParamHist2","pT:#sigma(1/pT)*pT:centrality",3,binsTrackParamHist2,minTrackParamHist2,maxTrackParamHist2);
  fTrackParamHist2->SetBinEdges(0,bins);
  fTrackParamHist2->GetAxis(0)->SetTitle("pT (GeV/c)");
  fTrackParamHist2->GetAxis(1)->SetTitle("#sigma(1/pT)*pT");
  fTrackParamHist2->GetAxis(2)->SetTitle("centrality");
  fTrackParamHist2->Sumw2();

  // init folder
  fAnalysisFolder = CreateFolder("folderdNdPt","Analysis dNdPt Folder");
  
}

//_____________________________________________________________________________
void AliPtResolAnalysisPbPb::Process(AliESDEvent *const esdEvent, AliMCEvent *const mcEvent)
{
  //
  // Process real and/or simulated events
  //
  if(!esdEvent) {
    AliDebug(AliLog::kError, "esdEvent not available");
    return;
  }

  // get selection cuts
  AlidNdPtEventCuts *evtCuts = GetEventCuts(); 
  AlidNdPtAcceptanceCuts *accCuts = GetAcceptanceCuts(); 
  AliESDtrackCuts *esdTrackCuts = GetTrackCuts(); 

  if(!evtCuts || !accCuts  || !esdTrackCuts) {
    AliDebug(AliLog::kError, "cuts not available");
    return;
  }

  // trigger selection
  Bool_t isEventTriggered = kTRUE;
  AliPhysicsSelection *physicsSelection = NULL;
  AliTriggerAnalysis* triggerAnalysis = NULL;

  // 
  AliInputEventHandler* inputHandler = (AliInputEventHandler*) AliAnalysisManager::GetAnalysisManager()->GetInputEventHandler();
  if (!inputHandler)
  {
    Printf("ERROR: Could not receive input handler");
    return;
  }

  if(evtCuts->IsTriggerRequired())  
  {
    // always MB
    isEventTriggered = inputHandler->IsEventSelected() & AliVEvent::kMB;

    physicsSelection = static_cast<AliPhysicsSelection*> (inputHandler->GetEventSelection());
    if(!physicsSelection) return;
    //SetPhysicsTriggerSelection(physicsSelection);

    if (isEventTriggered && (GetTrigger() == AliTriggerAnalysis::kV0AND)) {
      // set trigger (V0AND)
      triggerAnalysis = physicsSelection->GetTriggerAnalysis();
      if(!triggerAnalysis) return;
      isEventTriggered = triggerAnalysis->IsOfflineTriggerFired(esdEvent, GetTrigger());
    }


   // centrality determination
   Float_t centralityF = -1.;
   AliCentrality *esdCentrality = esdEvent->GetCentrality();
   centralityF = esdCentrality->GetCentralityPercentile(fCentralityEstimator.Data());

  // get reconstructed vertex  
  const AliESDVertex* vtxESD = 0; 
  Bool_t isRecVertex = kFALSE;
  if(evtCuts->IsRecVertexRequired()) 
  {
    Bool_t bRedoTPCVertex = evtCuts->IsRedoTPCVertex();
    Bool_t bUseConstraints = evtCuts->IsUseBeamSpotConstraint();
    vtxESD = AlidNdPtHelper::GetVertex(esdEvent,evtCuts,accCuts,esdTrackCuts,GetAnalysisMode(),kFALSE,bRedoTPCVertex,bUseConstraints); 
    isRecVertex = AlidNdPtHelper::TestRecVertex(vtxESD, esdEvent->GetPrimaryVertexSPD(), GetAnalysisMode(), kFALSE);
  }

  Bool_t isEventOK = evtCuts->AcceptEvent(esdEvent,mcEvent,vtxESD) && isRecVertex; 
  //printf("isEventOK %d, isEventTriggered %d \n",isEventOK, isEventTriggered);
  //printf("GetAnalysisMode() %d \n",GetAnalysisMode());

  //
  TObjArray *allChargedTracks=0;
  // check event cuts
  if(isEventOK && isEventTriggered)
  {
    // get all charged tracks
    allChargedTracks = AlidNdPtHelper::GetAllChargedTracks(esdEvent,GetAnalysisMode());
    if(!allChargedTracks) return;

    Int_t entries = allChargedTracks->GetEntries();
    //printf("entries %d \n",entries);

    // fill histograms
    for(Int_t i=0; i<entries;++i) 
    {
      AliESDtrack *track = (AliESDtrack*)allChargedTracks->At(i);
      if(!track) continue;
      if(track->Charge()==0) continue;

      // only postive charged 
      if(GetParticleMode() == AlidNdPtHelper::kPlus && track->Charge() < 0) 
        continue;
      
      // only negative charged 
      if(GetParticleMode() == AlidNdPtHelper::kMinus && track->Charge() > 0) 
        continue;

      if(esdTrackCuts->AcceptTrack(track)) 
      {
        if(accCuts->AcceptTrack(track)) 
        {
	  //Double_t x, par[5], cov[15];
	  //track->GetExternalParameters(x, p);
	  //track->GetExternalCovariance(cov);

	  Double_t v[3] = {track->OneOverPt(),TMath::Sqrt(track->GetSigma1Pt2()),centralityF};
	  fTrackParamHist->Fill(v);

	  Double_t v2[3] = {track->Pt(),track->Pt()*TMath::Sqrt(track->GetSigma1Pt2()),centralityF};
	  fTrackParamHist2->Fill(v2);
        }
      }  
    }
  }
 }
}

//_____________________________________________________________________________
Long64_t AliPtResolAnalysisPbPb::Merge(TCollection* const list) 
{
  // Merge list of objects (needed by PROOF)

  if (!list)
  return 0;

  if (list->IsEmpty())
  return 1;

  TIterator* iter = list->MakeIterator();
  TObject* obj = 0;

  //
  //TList *collPhysSelection = new TList;

  // collection of generated histograms

  Int_t count=0;
  while((obj = iter->Next()) != 0) {
    AliPtResolAnalysisPbPb* entry = dynamic_cast<AliPtResolAnalysisPbPb*>(obj);
    if (entry == 0) continue; 
    
    //
    fTrackParamHist->Add(entry->fTrackParamHist);
    fTrackParamHist2->Add(entry->fTrackParamHist2);
  }

return count;
}

//_____________________________________________________________________________
void AliPtResolAnalysisPbPb::Analyse() 
{
  // Analyse histograms
  //
  TH1::AddDirectory(kFALSE);
  TObjArray *aFolderObj = new TObjArray;
  if(!aFolderObj) return;
  
  //
  // Reconstructed event vertex
  //
  
  // export objects to analysis folder
  fAnalysisFolder = ExportToFolder(aFolderObj);
  if(!fAnalysisFolder) { 
    if(aFolderObj) delete aFolderObj;
    return;
  }

  // delete only TObjArray
  if(aFolderObj) delete aFolderObj;
}

//_____________________________________________________________________________
TFolder* AliPtResolAnalysisPbPb::ExportToFolder(TObjArray * const array) 
{
  // recreate folder avery time and export objects to new one
  //
  if(!array) return NULL;

  AliPtResolAnalysisPbPb * comp=this;
  TFolder *folder = comp->GetAnalysisFolder();

  TString name, title;
  TFolder *newFolder = 0;
  Int_t i = 0;
  Int_t size = array->GetSize();

  if(folder) { 
     // get name and title from old folder
     name = folder->GetName();  
     title = folder->GetTitle();  

	 // delete old one
     delete folder;

	 // create new one
     newFolder = CreateFolder(name.Data(),title.Data());
     newFolder->SetOwner();

	 // add objects to folder
     while(i < size) {
	   newFolder->Add(array->At(i));
	   i++;
	 }
  }

return newFolder;
}

//_____________________________________________________________________________
TFolder* AliPtResolAnalysisPbPb::CreateFolder(TString name,TString title) { 
// create folder for analysed histograms
//
TFolder *folder = 0;
  folder = new TFolder(name.Data(),title.Data());

  return folder;
}
Commit	Line	Data
a65a7e70	1	/**************************************************************************
	2	* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
	3	* *
	4	* Author: The ALICE Off-line Project. *
	5	* Contributors are mentioned in the code where appropriate. *
	6	* *
	7	* Permission to use, copy, modify and distribute this software and its *
	8	* documentation strictly for non-commercial purposes is hereby granted *
	9	* without fee, provided that the above copyright notice appears in all *
	10	* copies and that both the copyright notice and this permission notice *
	11	* appear in the supporting documentation. The authors make no claims *
	12	* about the suitability of this software for any purpose. It is *
	13	* provided "as is" without express or implied warranty. *
	14	**************************************************************************/
	15	//------------------------------------------------------------------------------
	16	// AliPtResolAnalysisPbPb class.
	17	//
	18	// a. functionality:
	19	// - fills analysis control histograms
	20	//
	21	// b. data members:
	22	// - control histograms
	23	//
	24	// Author: J.Otwinowski 04/11/2008
	25	//------------------------------------------------------------------------------
	26
	27	#include "TH1.h"
	28	#include "TH2.h"
	29	#include "TCanvas.h"
	30	#include "THnSparse.h"
	31
	32	#include "AliHeader.h"
	33	#include "AliInputEventHandler.h"
	34	#include "AliAnalysisManager.h"
	35	#include "AliGenEventHeader.h"
	36	#include "AliStack.h"
	37	#include "AliESDEvent.h"
	38	#include "AliMCEvent.h"
	39	#include "AliESDtrackCuts.h"
	40	#include "AliLog.h"
	41	#include "AliMultiplicity.h"
	42	#include "AliTracker.h"
	43	#include "AliCentrality.h"
	44
	45	#include "AlidNdPtEventCuts.h"
	46	#include "AlidNdPtAcceptanceCuts.h"
	47	#include "AliPhysicsSelection.h"
	48	#include "AliTriggerAnalysis.h"
	49
	50	#include "AliPWG0Helper.h"
	51	#include "AlidNdPtHelper.h"
	52	#include "AliPtResolAnalysisPbPb.h"
	53
	54
	55	using namespace std;
	56
	57	ClassImp(AliPtResolAnalysisPbPb)
	58
	59	//_____________________________________________________________________________
	60	AliPtResolAnalysisPbPb::AliPtResolAnalysisPbPb(): AlidNdPt(),
	61	fAnalysisFolder(0),
	62	fTrackParamHist(0),
	63	fTrackParamHist2(0),
	64	fCentralityEstimator(0)
65	{
66	// default constructor
67	Init();
68	}
69
70	//_____________________________________________________________________________
71	AliPtResolAnalysisPbPb::AliPtResolAnalysisPbPb(Char_t* name, Char_t* title): AlidNdPt(name,title),
72	fAnalysisFolder(0),
73	fTrackParamHist(0),
74	fTrackParamHist2(0),
75	fCentralityEstimator(0)
76	{
77	Init();
78	}
79
80	//_____________________________________________________________________________
81	AliPtResolAnalysisPbPb::~AliPtResolAnalysisPbPb() {
82	//
83	// destructor
84	//
85	if(fAnalysisFolder) delete fAnalysisFolder; fAnalysisFolder=0;
86	if(fTrackParamHist) delete fTrackParamHist; fTrackParamHist=0;
87	if(fTrackParamHist2) delete fTrackParamHist2; fTrackParamHist2=0;
88	}
89
90	//_____________________________________________________________________________
91	void AliPtResolAnalysisPbPb::Init(){
92	//
93	// Generic histograms to be corrected
94	//
95	//1/pT:#sigma(1/pT):centrality
96	Int_t binsTrackParamHist[3]={400,300,11};
97	Double_t minTrackParamHist[3]={0,0,0};
98	Double_t maxTrackParamHist[3]={1,0.015,100};
99
100	Double_t centrBins[12] = {0.0,5.,10.,20.,30.,40.,50.,60.,70.,80.,90.,100};
101
102
103	fTrackParamHist = new THnSparseF("fTrackParamHist","1/pT:#sigma(1/pT):centrality",3,binsTrackParamHist,minTrackParamHist,maxTrackParamHist);
104	fTrackParamHist->SetBinEdges(2,centrBins);
105	fTrackParamHist->GetAxis(0)->SetTitle("1/pT (GeV/c)^{-1}");
106	fTrackParamHist->GetAxis(1)->SetTitle("#sigma(1/pT)");
107	fTrackParamHist->GetAxis(2)->SetTitle("centrality");
108	fTrackParamHist->Sumw2();
109
110	//pt:sigma(1/pT)*pT:centrality
111	const Int_t ptNbins = 73;
112	Double_t bins[74] = {0.0, 0.05, 0.1, 0.15, 0.2, 0.25, 0.3, 0.35, 0.4, 0.45, 0.5, 0.55, 0.6, 0.65, 0.7, 0.75, 0.8, 0.85, 0.9, 0.95, 1.0, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9, 2.0, 2.2, 2.4, 2.6, 2.8, 3.0, 3.2, 3.4, 3.6, 3.8, 4.0, 4.5, 5.0, 5.5, 6.0, 6.5, 7.0, 8.0, 9.0, 10.0, 11.0, 12.0, 13.0, 14.0, 15.0, 16.0, 18.0, 20.0, 22.0, 24.0, 26.0, 28.0, 30.0, 32.0, 34.0, 36.0, 40.0, 45.0, 50.0, 60.0, 70.0, 80.0, 90.0, 100.0 };
113
114	Int_t binsTrackParamHist2[3]={ptNbins,200,11};
115	Double_t minTrackParamHist2[3]={0,0,0};
116	Double_t maxTrackParamHist2[3]={100,0.2,100};
117
118	fTrackParamHist2 = new THnSparseF("fTrackParamHist2","pT:#sigma(1/pT)*pT:centrality",3,binsTrackParamHist2,minTrackParamHist2,maxTrackParamHist2);
119	fTrackParamHist2->SetBinEdges(0,bins);
120	fTrackParamHist2->GetAxis(0)->SetTitle("pT (GeV/c)");
121	fTrackParamHist2->GetAxis(1)->SetTitle("#sigma(1/pT)*pT");
122	fTrackParamHist2->GetAxis(2)->SetTitle("centrality");
123	fTrackParamHist2->Sumw2();
124
125	// init folder
126	fAnalysisFolder = CreateFolder("folderdNdPt","Analysis dNdPt Folder");
127
128	}
129
130	//_____________________________________________________________________________
131	void AliPtResolAnalysisPbPb::Process(AliESDEvent const esdEvent, AliMCEvent const mcEvent)
132	{
133	//
134	// Process real and/or simulated events
135	//
136	if(!esdEvent) {
137	AliDebug(AliLog::kError, "esdEvent not available");
138	return;
139	}
140
141	// get selection cuts
142	AlidNdPtEventCuts *evtCuts = GetEventCuts();
143	AlidNdPtAcceptanceCuts *accCuts = GetAcceptanceCuts();
144	AliESDtrackCuts *esdTrackCuts = GetTrackCuts();
145
146	if(!evtCuts \|\| !accCuts \|\| !esdTrackCuts) {
147	AliDebug(AliLog::kError, "cuts not available");
148	return;
149	}
150
151	// trigger selection
152	Bool_t isEventTriggered = kTRUE;
153	AliPhysicsSelection *physicsSelection = NULL;
154	AliTriggerAnalysis* triggerAnalysis = NULL;
155
156	//
157	AliInputEventHandler* inputHandler = (AliInputEventHandler*) AliAnalysisManager::GetAnalysisManager()->GetInputEventHandler();
158	if (!inputHandler)
159	{
160	Printf("ERROR: Could not receive input handler");
161	return;
162	}
163
164	if(evtCuts->IsTriggerRequired())
165	{
166	// always MB
167	isEventTriggered = inputHandler->IsEventSelected() & AliVEvent::kMB;
168
169	physicsSelection = static_cast<AliPhysicsSelection*> (inputHandler->GetEventSelection());
170	if(!physicsSelection) return;
171	//SetPhysicsTriggerSelection(physicsSelection);
172
173	if (isEventTriggered && (GetTrigger() == AliTriggerAnalysis::kV0AND)) {
174	// set trigger (V0AND)
175	triggerAnalysis = physicsSelection->GetTriggerAnalysis();
176	if(!triggerAnalysis) return;
177	isEventTriggered = triggerAnalysis->IsOfflineTriggerFired(esdEvent, GetTrigger());
178	}
179
180
181	// centrality determination
182	Float_t centralityF = -1.;
183	AliCentrality *esdCentrality = esdEvent->GetCentrality();
184	centralityF = esdCentrality->GetCentralityPercentile(fCentralityEstimator.Data());
185
186	// get reconstructed vertex
187	const AliESDVertex* vtxESD = 0;
188	Bool_t isRecVertex = kFALSE;
189	if(evtCuts->IsRecVertexRequired())
190	{
191	Bool_t bRedoTPCVertex = evtCuts->IsRedoTPCVertex();
192	Bool_t bUseConstraints = evtCuts->IsUseBeamSpotConstraint();
193	vtxESD = AlidNdPtHelper::GetVertex(esdEvent,evtCuts,accCuts,esdTrackCuts,GetAnalysisMode(),kFALSE,bRedoTPCVertex,bUseConstraints);
194	isRecVertex = AlidNdPtHelper::TestRecVertex(vtxESD, esdEvent->GetPrimaryVertexSPD(), GetAnalysisMode(), kFALSE);
195	}
196
197	Bool_t isEventOK = evtCuts->AcceptEvent(esdEvent,mcEvent,vtxESD) && isRecVertex;
198	//printf("isEventOK %d, isEventTriggered %d \n",isEventOK, isEventTriggered);
199	//printf("GetAnalysisMode() %d \n",GetAnalysisMode());
200
201	//
202	TObjArray *allChargedTracks=0;
203	// check event cuts
204	if(isEventOK && isEventTriggered)
205	{
206	// get all charged tracks
207	allChargedTracks = AlidNdPtHelper::GetAllChargedTracks(esdEvent,GetAnalysisMode());
208	if(!allChargedTracks) return;
209
210	Int_t entries = allChargedTracks->GetEntries();
211	//printf("entries %d \n",entries);
212
213	// fill histograms
214	for(Int_t i=0; i<entries;++i)
215	{
216	AliESDtrack track = (AliESDtrack)allChargedTracks->At(i);
217	if(!track) continue;
218	if(track->Charge()==0) continue;
219
220	// only postive charged
221	if(GetParticleMode() == AlidNdPtHelper::kPlus && track->Charge() < 0)
222	continue;
223
224	// only negative charged
225	if(GetParticleMode() == AlidNdPtHelper::kMinus && track->Charge() > 0)
226	continue;
227
228	if(esdTrackCuts->AcceptTrack(track))
229	{
230	if(accCuts->AcceptTrack(track))
231	{
232	//Double_t x, par[5], cov[15];
233	//track->GetExternalParameters(x, p);
234	//track->GetExternalCovariance(cov);
235
236	Double_t v[3] = {track->OneOverPt(),TMath::Sqrt(track->GetSigma1Pt2()),centralityF};
237	fTrackParamHist->Fill(v);
238
239	Double_t v2[3] = {track->Pt(),track->Pt()*TMath::Sqrt(track->GetSigma1Pt2()),centralityF};
240	fTrackParamHist2->Fill(v2);
241	}
242	}
243	}
244	}
245	}
246	}
247
248	//_____________________________________________________________________________
249	Long64_t AliPtResolAnalysisPbPb::Merge(TCollection* const list)
250	{
251	// Merge list of objects (needed by PROOF)
252
253	if (!list)
254	return 0;
255
256	if (list->IsEmpty())
257	return 1;
258
259	TIterator* iter = list->MakeIterator();
260	TObject* obj = 0;
261
262	//
263	//TList *collPhysSelection = new TList;
264
265	// collection of generated histograms
266
267	Int_t count=0;
268	while((obj = iter->Next()) != 0) {
269	AliPtResolAnalysisPbPb* entry = dynamic_cast<AliPtResolAnalysisPbPb*>(obj);
270	if (entry == 0) continue;
271
272	//
273	fTrackParamHist->Add(entry->fTrackParamHist);
274	fTrackParamHist2->Add(entry->fTrackParamHist2);
275	}
276
277	return count;
278	}
279
280	//_____________________________________________________________________________
281	void AliPtResolAnalysisPbPb::Analyse()
282	{
283	// Analyse histograms
284	//
285	TH1::AddDirectory(kFALSE);
286	TObjArray *aFolderObj = new TObjArray;
287	if(!aFolderObj) return;
288
289	//
290	// Reconstructed event vertex
291	//
292
293	// export objects to analysis folder
294	fAnalysisFolder = ExportToFolder(aFolderObj);
295	if(!fAnalysisFolder) {
296	if(aFolderObj) delete aFolderObj;
297	return;
298	}
299
300	// delete only TObjArray
301	if(aFolderObj) delete aFolderObj;
302	}
303
304	//_____________________________________________________________________________
305	TFolder* AliPtResolAnalysisPbPb::ExportToFolder(TObjArray * const array)
306	{
307	// recreate folder avery time and export objects to new one
308	//
309	if(!array) return NULL;
310
311	AliPtResolAnalysisPbPb * comp=this;
312	TFolder *folder = comp->GetAnalysisFolder();
313
314	TString name, title;
315	TFolder *newFolder = 0;
316	Int_t i = 0;
317	Int_t size = array->GetSize();
318
319	if(folder) {
320	// get name and title from old folder
321	name = folder->GetName();
322	title = folder->GetTitle();
323
324	// delete old one
325	delete folder;
326
327	// create new one
328	newFolder = CreateFolder(name.Data(),title.Data());
329	newFolder->SetOwner();
330
331	// add objects to folder
332	while(i < size) {
333	newFolder->Add(array->At(i));
334	i++;
335	}
336	}
337
338	return newFolder;
339	}
340
341	//_____________________________________________________________________________
342	TFolder* AliPtResolAnalysisPbPb::CreateFolder(TString name,TString title) {
343	// create folder for analysed histograms
344	//
345	TFolder *folder = 0;
346	folder = new TFolder(name.Data(),title.Data());
347
348	return folder;
349	}