[u/mrichter/AliRoot.git] / PWG0 / dNdEta / AlidNdEtaSystematicsSelector.cxx

/* $Id$ */

#include "AlidNdEtaSystematicsSelector.h"

#include <TStyle.h>
#include <TSystem.h>
#include <TCanvas.h>
#include <TVector3.h>
#include <TChain.h>
#include <TFile.h>
#include <TH3F.h>
#include <TH1F.h>
#include <TParticle.h>

#include <AliLog.h>
#include <AliESD.h>
#include <AliGenEventHeader.h>
#include <AliStack.h>
#include <AliHeader.h>

#include "esdTrackCuts/AliESDtrackCuts.h"
#include "AliPWG0Helper.h"
#include "AlidNdEtaCorrection.h"

ClassImp(AlidNdEtaSystematicsSelector)

AlidNdEtaSystematicsSelector::AlidNdEtaSystematicsSelector() :
  AliSelectorRL(),
  fSecondaries(0),
  fSigmaVertex(0),
  fEsdTrackCuts(0),
  fOverallPrimaries(0),
  fOverallSecondaries(0)
{
  //
  // Constructor. Initialization of pointers
  //

  for (Int_t i=0; i<4; ++i)
    fdNdEtaCorrection[i] = 0;
}

AlidNdEtaSystematicsSelector::~AlidNdEtaSystematicsSelector()
{
  //
  // Destructor
  //
}

void AlidNdEtaSystematicsSelector::Begin(TTree* tree)
{
  // Begin function

  AliSelectorRL::Begin(tree);

  ReadUserObjects(tree);
}

void AlidNdEtaSystematicsSelector::ReadUserObjects(TTree* tree)
{
  // read the user objects, called from slavebegin and begin

  if (!fEsdTrackCuts && fInput)
    fEsdTrackCuts = dynamic_cast<AliESDtrackCuts*> (fInput->FindObject("AliESDtrackCuts"));

  if (!fEsdTrackCuts && tree)
    fEsdTrackCuts = dynamic_cast<AliESDtrackCuts*> (tree->GetUserInfo()->FindObject("AliESDtrackCuts"));

  if (!fEsdTrackCuts)
     AliDebug(AliLog::kError, "ERROR: Could not read EsdTrackCuts from input list.");
}

void AlidNdEtaSystematicsSelector::SlaveBegin(TTree* tree)
{
  // The SlaveBegin() function is called after the Begin() function.
  // When running with PROOF SlaveBegin() is called on each slave server.
  // The tree argument is deprecated (on PROOF 0 is passed).

  AliSelector::SlaveBegin(tree);

  ReadUserObjects(tree);

  TString option(GetOption());

  printf("Running AlidNdEtaSystematicsSelector with options %s\n", option.Data());

  if (option.Contains("secondaries"))
  {
    fSecondaries = new TH3F("fSecondaries", "fSecondaries;NacceptedTracks;CratioSecondaries;p_{T}", 2000, -0.5, 205.5, 16, 0.45, 2.05, 10, 0, 10);
  }

  if (option.Contains("particle-composition"))
  {
    for (Int_t i=0; i<4; ++i)
    {
      TString name;
      name.Form("correction_%d", i);
      fdNdEtaCorrection[i] = new AlidNdEtaCorrection(name, name);
    }
  }

  if (option.Contains("sigma-vertex"))
  {
    fSigmaVertex = new TH1F("fSigmaVertex", "fSigmaVertex;Nsigma2vertex;NacceptedTracks", 10, 0.25, 5.25);
    printf("WARNING: sigma-vertex analysis enabled. This will produce weird results in the AliESDtrackCuts histograms\n");
  }
}

Bool_t AlidNdEtaSystematicsSelector::Process(Long64_t entry)
{
  // The Process() function is called for each entry in the tree (or possibly
  // keyed object in the case of PROOF) to be processed. The entry argument
  // specifies which entry in the currently loaded tree is to be processed.
  // It can be passed to either TTree::GetEntry() or TBranch::GetEntry()
  // to read either all or the required parts of the data. When processing
  // keyed objects with PROOF, the object is already loaded and is available
  // via the fObject pointer.
  //
  // This function should contain the "body" of the analysis. It can contain
  // simple or elaborate selection criteria, run algorithms on the data
  // of the event and typically fill histograms.

  // WARNING when a selector is used with a TChain, you must use
  //  the pointer to the current TTree to call GetEntry(entry).
  //  The entry is always the local entry number in the current tree.
  //  Assuming that fTree is the pointer to the TChain being processed,
  //  use fTree->GetTree()->GetEntry(entry).

  if (AliSelectorRL::Process(entry) == kFALSE)
    return kFALSE;

  // Check prerequisites
  if (!fESD)
  {
    AliDebug(AliLog::kError, "ESD branch not available");
    return kFALSE;
  }

  if (!fEsdTrackCuts)
  {
    AliDebug(AliLog::kError, "fESDTrackCuts not available");
    return kFALSE;
  }

  AliStack* stack = GetStack();
  if (!stack)
  {
    AliDebug(AliLog::kError, "Stack not available");
    return kFALSE;
  }

  TObjArray* list = fEsdTrackCuts->GetAcceptedTracks(fESD);

  if (fdNdEtaCorrection[0])
    FillCorrectionMaps(list);

  if (fSecondaries)
    FillSecondaries(list);

  if (fSigmaVertex)
    FillSigmaVertex();

  delete list;
  list = 0;

  return kTRUE;
}

void AlidNdEtaSystematicsSelector::FillCorrectionMaps(TObjArray* listOfTracks)
{
  // fills the correction maps for different particle species

  AliStack* stack = GetStack();
  AliHeader* header = GetHeader();

  Bool_t vertexReconstructed = AliPWG0Helper::IsVertexReconstructed(fESD);
  Bool_t eventTriggered = AliPWG0Helper::IsEventTriggered(fESD);

  for (Int_t i=0; i<4; ++i)
  {
    fdNdEtaCorrection[i]->IncreaseEventCount();
    if (eventTriggered)
      fdNdEtaCorrection[i]->IncreaseTriggeredEventCount();
  }

  // get the MC vertex
  AliGenEventHeader* genHeader = header->GenEventHeader();

  TArrayF vtxMC(3);
  genHeader->PrimaryVertex(vtxMC);

  // loop over mc particles
  Int_t nPrim  = stack->GetNprimary();

  for (Int_t iMc = 0; iMc < nPrim; ++iMc)
  {
    TParticle* particle = stack->Particle(iMc);

    if (!particle)
    {
      AliDebug(AliLog::kError, Form("UNEXPECTED: particle with label %d not found in stack (mc loop).", iMc));
      continue;
    }

    if (AliPWG0Helper::IsPrimaryCharged(particle, nPrim) == kFALSE)
      continue;

    Float_t eta = particle->Eta();
    Float_t pt = particle->Pt();

    Int_t id = -1;
    switch (TMath::Abs(particle->GetPdgCode()))
    {
      case 211: id = 0; break;
      case 321: id = 1; break;
      case 2212: id = 2; break;
      default: id = 3; break;
    }

    if (vertexReconstructed)
      fdNdEtaCorrection[id]->FillParticle(vtxMC[2], eta, pt);

    fdNdEtaCorrection[id]->FillParticleAllEvents(eta, pt);
    if (eventTriggered)
      fdNdEtaCorrection[id]->FillParticleWhenEventTriggered(eta, pt);
  }// end of mc particle

  // loop over esd tracks
  TIterator* iter = listOfTracks->MakeIterator();
  TObject* obj = 0;
  while ((obj = iter->Next()) != 0)
  {
    AliESDtrack* esdTrack = dynamic_cast<AliESDtrack*> (obj);
    if (!esdTrack)
      continue;

    // using the properties of the mc particle
    Int_t label = TMath::Abs(esdTrack->GetLabel());
    TParticle* particle = stack->Particle(label);
    if (!particle)
    {
      AliDebug(AliLog::kError, Form("UNEXPECTED: particle with label %d not found in stack (track loop).", label));
      continue;
    }

    Int_t id = -1;
    switch (TMath::Abs(particle->GetPdgCode()))
    {
      case 211:  id = 0; break;
      case 321:  id = 1; break;
      case 2212: id = 2; break;
      default:   id = 3; break;
    }

    if (vertexReconstructed)
      fdNdEtaCorrection[id]->FillParticleWhenMeasuredTrack(vtxMC[2], particle->Eta(), particle->Pt());
  } // end of track loop

  delete iter;
  iter = 0;
}

void AlidNdEtaSystematicsSelector::FillSecondaries(TObjArray* listOfTracks)
{
  // fills the secondary histograms

  AliStack* stack = GetStack();

  TH1* nPrimaries = new TH1F("secondaries_primaries", "secondaries_primaries", fSecondaries->GetZaxis()->GetNbins(), fSecondaries->GetZaxis()->GetXmin(), fSecondaries->GetZaxis()->GetXmax());
  TH1* nSecondaries = new TH1F("secondaries_secondaries", "secondaries_secondaries", fSecondaries->GetZaxis()->GetNbins(), fSecondaries->GetZaxis()->GetXmin(), fSecondaries->GetZaxis()->GetXmax());

  TIterator* iter = listOfTracks->MakeIterator();
  TObject* obj = 0;
  while ((obj = iter->Next()) != 0)
  {
    AliESDtrack* esdTrack = dynamic_cast<AliESDtrack*> (obj);
    if (!esdTrack)
      continue;

    Int_t label = TMath::Abs(esdTrack->GetLabel());
    TParticle* particle = stack->Particle(label);
    if (!particle)
    {
      AliDebug(AliLog::kError, Form("UNEXPECTED: particle with label %d not found in stack (track loop).", label));
      continue;
    }

    Int_t nPrim  = stack->GetNprimary();
    if (label < nPrim)
      nPrimaries->Fill(particle->Pt());
    else
      nSecondaries->Fill(particle->Pt());
  }

  for (Int_t i=1; i<=nPrimaries->GetNbinsX(); ++i)
  {
    Int_t primaries = (Int_t) nPrimaries->GetBinContent(i);
    Int_t secondaries = (Int_t) nSecondaries->GetBinContent(i);

    if (primaries + secondaries > 0)
    {
      AliDebug(AliLog::kDebug, Form("The ratio between primaries and secondaries is %d:%d = %f", primaries, secondaries, ((secondaries > 0) ? (Double_t) primaries / secondaries : -1)));

      for (Double_t factor = 0.5; factor < 2.01; factor += 0.1)
      {
        Double_t nTracks = (Double_t) primaries + (Double_t) secondaries * factor;
        fSecondaries->Fill(nTracks, factor, nPrimaries->GetBinCenter(i));
        //if (secondaries > 0) printf("We fill: %f %f %f\n", nTracks, factor, nPrimaries->GetBinCenter(i));
      }
    }
  }

  fOverallPrimaries += (Int_t) nPrimaries->Integral();
  fOverallSecondaries += (Int_t) nSecondaries->Integral();

  delete nPrimaries;
  nPrimaries = 0;

  delete nSecondaries;
  nSecondaries = 0;

  delete iter;
  iter = 0;
}

void AlidNdEtaSystematicsSelector::FillSigmaVertex()
{
  // fills the fSigmaVertex histogram

  // save the old value
  Float_t oldSigmaVertex = fEsdTrackCuts->GetMinNsigmaToVertex();

  // set to maximum
  fEsdTrackCuts->SetMinNsigmaToVertex(5);

  TObjArray* list = fEsdTrackCuts->GetAcceptedTracks(fESD);

  TIterator* iter = list->MakeIterator();
  TObject* obj = 0;
  while ((obj = iter->Next()) != 0)
  {
    AliESDtrack* esdTrack = dynamic_cast<AliESDtrack*> (obj);
    if (!esdTrack)
      continue;

    Float_t sigma2Vertex = fEsdTrackCuts->GetSigmaToVertex(esdTrack);

    for (Double_t nSigma = 0.5; nSigma < 5.1; nSigma += 0.5)
    {
      if (sigma2Vertex < nSigma)
        fSigmaVertex->Fill(nSigma);
    }
  }

  delete iter;
  iter = 0;

  delete list;
  list = 0;

  // set back the old value
  fEsdTrackCuts->SetMinNsigmaToVertex(oldSigmaVertex);
}

void AlidNdEtaSystematicsSelector::SlaveTerminate()
{
  // The SlaveTerminate() function is called after all entries or objects
  // have been processed. When running with PROOF SlaveTerminate() is called
  // on each slave server.

  AliSelector::SlaveTerminate();

  // Add the histograms to the output on each slave server
  if (!fOutput)
  {
    AliDebug(AliLog::kError, Form("ERROR: Output list not initialized."));
    return;
  }

  if (fSecondaries)
    fOutput->Add(fSecondaries);

  for (Int_t i=0; i<4; ++i)
    if (fdNdEtaCorrection[i])
      fOutput->Add(fdNdEtaCorrection[i]);

  if (fSigmaVertex)
    fOutput->Add(fSigmaVertex);
}

void AlidNdEtaSystematicsSelector::Terminate()
{
  // The Terminate() function is the last function to be called during
  // a query. It always runs on the client, it can be used to present
  // the results graphically or save the results to file.

  AliSelector::Terminate();

  fSecondaries = dynamic_cast<TH3F*> (fOutput->FindObject("fSecondaries"));
  for (Int_t i=0; i<4; ++i)
    fdNdEtaCorrection[i] = dynamic_cast<AlidNdEtaCorrection*> (fOutput->FindObject(Form("correction_%d", i)));
  fSigmaVertex = dynamic_cast<TH1F*> (fOutput->FindObject("fSigmaVertex"));

  TFile* fout = TFile::Open("systematics.root", "RECREATE");

  if (fEsdTrackCuts)
    fEsdTrackCuts->SaveHistograms("esd_track_cuts");

  if (fSecondaries)
  {
    fSecondaries->Write();
    printf("We had %d primaries and %d secondaries.\n", (Int_t) fOverallPrimaries, (Int_t) fOverallSecondaries);
  }

  if (fSigmaVertex)
    fSigmaVertex->Write();

  for (Int_t i=0; i<4; ++i)
    if (fdNdEtaCorrection[i])
      fdNdEtaCorrection[i]->SaveHistograms();

  fout->Write();
  fout->Close();

  if (fSecondaries)
  {
    new TCanvas;
    fSecondaries->Draw();
  }

  if (fSigmaVertex)
  {
    new TCanvas;
    fSigmaVertex->Draw();
  }
}
Commit	Line	Data
10ebe68d	1	/* $Id$ */
	2
	3	#include "AlidNdEtaSystematicsSelector.h"
	4
	5	#include <TStyle.h>
	6	#include <TSystem.h>
	7	#include <TCanvas.h>
	8	#include <TVector3.h>
	9	#include <TChain.h>
	10	#include <TFile.h>
	11	#include <TH3F.h>
	12	#include <TH1F.h>
	13	#include <TParticle.h>
	14
	15	#include <AliLog.h>
	16	#include <AliESD.h>
	17	#include <AliGenEventHeader.h>
	18	#include <AliStack.h>
	19	#include <AliHeader.h>
	20
	21	#include "esdTrackCuts/AliESDtrackCuts.h"
	22	#include "AliPWG0Helper.h"
	23	#include "AlidNdEtaCorrection.h"
	24
	25	ClassImp(AlidNdEtaSystematicsSelector)
	26
	27	AlidNdEtaSystematicsSelector::AlidNdEtaSystematicsSelector() :
	28	AliSelectorRL(),
	29	fSecondaries(0),
9f469bf5	30	fSigmaVertex(0),
f31d5d49	31	fEsdTrackCuts(0),
	32	fOverallPrimaries(0),
	33	fOverallSecondaries(0)
10ebe68d	34	{
	35	//
	36	// Constructor. Initialization of pointers
	37	//
	38
	39	for (Int_t i=0; i<4; ++i)
	40	fdNdEtaCorrection[i] = 0;
	41	}
	42
	43	AlidNdEtaSystematicsSelector::~AlidNdEtaSystematicsSelector()
	44	{
	45	//
	46	// Destructor
	47	//
	48	}
	49
	50	void AlidNdEtaSystematicsSelector::Begin(TTree* tree)
	51	{
	52	// Begin function
	53
	54	AliSelectorRL::Begin(tree);
	55
	56	ReadUserObjects(tree);
	57	}
	58
	59	void AlidNdEtaSystematicsSelector::ReadUserObjects(TTree* tree)
	60	{
	61	// read the user objects, called from slavebegin and begin
	62
	63	if (!fEsdTrackCuts && fInput)
	64	fEsdTrackCuts = dynamic_cast<AliESDtrackCuts*> (fInput->FindObject("AliESDtrackCuts"));
	65
	66	if (!fEsdTrackCuts && tree)
	67	fEsdTrackCuts = dynamic_cast<AliESDtrackCuts*> (tree->GetUserInfo()->FindObject("AliESDtrackCuts"));
	68
	69	if (!fEsdTrackCuts)
	70	AliDebug(AliLog::kError, "ERROR: Could not read EsdTrackCuts from input list.");
	71	}
	72
	73	void AlidNdEtaSystematicsSelector::SlaveBegin(TTree* tree)
	74	{
	75	// The SlaveBegin() function is called after the Begin() function.
	76	// When running with PROOF SlaveBegin() is called on each slave server.
	77	// The tree argument is deprecated (on PROOF 0 is passed).
	78
	79	AliSelector::SlaveBegin(tree);
	80
	81	ReadUserObjects(tree);
	82
	83	TString option(GetOption());
	84
	85	printf("Running AlidNdEtaSystematicsSelector with options %s\n", option.Data());
	86
	87	if (option.Contains("secondaries"))
	88	{
9f469bf5	89	fSecondaries = new TH3F("fSecondaries", "fSecondaries;NacceptedTracks;CratioSecondaries;p_{T}", 2000, -0.5, 205.5, 16, 0.45, 2.05, 10, 0, 10);
10ebe68d	90	}
	91
	92	if (option.Contains("particle-composition"))
	93	{
	94	for (Int_t i=0; i<4; ++i)
	95	{
	96	TString name;
	97	name.Form("correction_%d", i);
	98	fdNdEtaCorrection[i] = new AlidNdEtaCorrection(name, name);
	99	}
	100	}
9f469bf5	101
	102	if (option.Contains("sigma-vertex"))
	103	{
	104	fSigmaVertex = new TH1F("fSigmaVertex", "fSigmaVertex;Nsigma2vertex;NacceptedTracks", 10, 0.25, 5.25);
	105	printf("WARNING: sigma-vertex analysis enabled. This will produce weird results in the AliESDtrackCuts histograms\n");
	106	}
10ebe68d	107	}
	108
	109	Bool_t AlidNdEtaSystematicsSelector::Process(Long64_t entry)
	110	{
	111	// The Process() function is called for each entry in the tree (or possibly
	112	// keyed object in the case of PROOF) to be processed. The entry argument
	113	// specifies which entry in the currently loaded tree is to be processed.
	114	// It can be passed to either TTree::GetEntry() or TBranch::GetEntry()
	115	// to read either all or the required parts of the data. When processing
	116	// keyed objects with PROOF, the object is already loaded and is available
	117	// via the fObject pointer.
	118	//
	119	// This function should contain the "body" of the analysis. It can contain
	120	// simple or elaborate selection criteria, run algorithms on the data
	121	// of the event and typically fill histograms.
	122
	123	// WARNING when a selector is used with a TChain, you must use
	124	// the pointer to the current TTree to call GetEntry(entry).
	125	// The entry is always the local entry number in the current tree.
	126	// Assuming that fTree is the pointer to the TChain being processed,
	127	// use fTree->GetTree()->GetEntry(entry).
	128
	129	if (AliSelectorRL::Process(entry) == kFALSE)
	130	return kFALSE;
	131
	132	// Check prerequisites
	133	if (!fESD)
	134	{
	135	AliDebug(AliLog::kError, "ESD branch not available");
	136	return kFALSE;
	137	}
	138
	139	if (!fEsdTrackCuts)
	140	{
	141	AliDebug(AliLog::kError, "fESDTrackCuts not available");
	142	return kFALSE;
	143	}
	144
	145	AliStack* stack = GetStack();
	146	if (!stack)
	147	{
	148	AliDebug(AliLog::kError, "Stack not available");
	149	return kFALSE;
	150	}
	151
	152	TObjArray* list = fEsdTrackCuts->GetAcceptedTracks(fESD);
	153
	154	if (fdNdEtaCorrection[0])
	155	FillCorrectionMaps(list);
	156
	157	if (fSecondaries)
	158	FillSecondaries(list);
	159
9f469bf5	160	if (fSigmaVertex)
	161	FillSigmaVertex();
	162
10ebe68d	163	delete list;
	164	list = 0;
	165
	166	return kTRUE;
	167	}
	168
	169	void AlidNdEtaSystematicsSelector::FillCorrectionMaps(TObjArray* listOfTracks)
	170	{
	171	// fills the correction maps for different particle species
	172
	173	AliStack* stack = GetStack();
	174	AliHeader* header = GetHeader();
	175
	176	Bool_t vertexReconstructed = AliPWG0Helper::IsVertexReconstructed(fESD);
	177	Bool_t eventTriggered = AliPWG0Helper::IsEventTriggered(fESD);
	178
	179	for (Int_t i=0; i<4; ++i)
	180	{
	181	fdNdEtaCorrection[i]->IncreaseEventCount();
	182	if (eventTriggered)
	183	fdNdEtaCorrection[i]->IncreaseTriggeredEventCount();
	184	}
	185
	186	// get the MC vertex
	187	AliGenEventHeader* genHeader = header->GenEventHeader();
	188
	189	TArrayF vtxMC(3);
	190	genHeader->PrimaryVertex(vtxMC);
	191
	192	// loop over mc particles
	193	Int_t nPrim = stack->GetNprimary();
	194
	195	for (Int_t iMc = 0; iMc < nPrim; ++iMc)
	196	{
	197	TParticle* particle = stack->Particle(iMc);
	198
	199	if (!particle)
	200	{
	201	AliDebug(AliLog::kError, Form("UNEXPECTED: particle with label %d not found in stack (mc loop).", iMc));
	202	continue;
	203	}
	204
	205	if (AliPWG0Helper::IsPrimaryCharged(particle, nPrim) == kFALSE)
	206	continue;
	207
	208	Float_t eta = particle->Eta();
	209	Float_t pt = particle->Pt();
	210
	211	Int_t id = -1;
	212	switch (TMath::Abs(particle->GetPdgCode()))
	213	{
	214	case 211: id = 0; break;
	215	case 321: id = 1; break;
	216	case 2212: id = 2; break;
	217	default: id = 3; break;
	218	}
	219
	220	if (vertexReconstructed)
	221	fdNdEtaCorrection[id]->FillParticle(vtxMC[2], eta, pt);
	222
	223	fdNdEtaCorrection[id]->FillParticleAllEvents(eta, pt);
	224	if (eventTriggered)
	225	fdNdEtaCorrection[id]->FillParticleWhenEventTriggered(eta, pt);
	226	}// end of mc particle
227
228	// loop over esd tracks
229	TIterator* iter = listOfTracks->MakeIterator();
230	TObject* obj = 0;
231	while ((obj = iter->Next()) != 0)
232	{
233	AliESDtrack* esdTrack = dynamic_cast<AliESDtrack*> (obj);
234	if (!esdTrack)
235	continue;
236
237	// using the properties of the mc particle
238	Int_t label = TMath::Abs(esdTrack->GetLabel());
10ebe68d	239	TParticle* particle = stack->Particle(label);
	240	if (!particle)
	241	{
	242	AliDebug(AliLog::kError, Form("UNEXPECTED: particle with label %d not found in stack (track loop).", label));
	243	continue;
	244	}
	245
	246	Int_t id = -1;
	247	switch (TMath::Abs(particle->GetPdgCode()))
	248	{
9f469bf5	249	case 211: id = 0; break;
9f469bf5	250	case 321: id = 1; break;
10ebe68d	251	case 2212: id = 2; break;
9f469bf5	252	default: id = 3; break;
10ebe68d	253	}
	254
	255	if (vertexReconstructed)
	256	fdNdEtaCorrection[id]->FillParticleWhenMeasuredTrack(vtxMC[2], particle->Eta(), particle->Pt());
	257	} // end of track loop
	258
	259	delete iter;
	260	iter = 0;
	261	}
	262
	263	void AlidNdEtaSystematicsSelector::FillSecondaries(TObjArray* listOfTracks)
	264	{
	265	// fills the secondary histograms
	266
	267	AliStack* stack = GetStack();
	268
	269	TH1* nPrimaries = new TH1F("secondaries_primaries", "secondaries_primaries", fSecondaries->GetZaxis()->GetNbins(), fSecondaries->GetZaxis()->GetXmin(), fSecondaries->GetZaxis()->GetXmax());
	270	TH1* nSecondaries = new TH1F("secondaries_secondaries", "secondaries_secondaries", fSecondaries->GetZaxis()->GetNbins(), fSecondaries->GetZaxis()->GetXmin(), fSecondaries->GetZaxis()->GetXmax());
	271
	272	TIterator* iter = listOfTracks->MakeIterator();
	273	TObject* obj = 0;
	274	while ((obj = iter->Next()) != 0)
	275	{
	276	AliESDtrack* esdTrack = dynamic_cast<AliESDtrack*> (obj);
	277	if (!esdTrack)
	278	continue;
	279
	280	Int_t label = TMath::Abs(esdTrack->GetLabel());
10ebe68d	281	TParticle* particle = stack->Particle(label);
	282	if (!particle)
	283	{
	284	AliDebug(AliLog::kError, Form("UNEXPECTED: particle with label %d not found in stack (track loop).", label));
	285	continue;
	286	}
	287
	288	Int_t nPrim = stack->GetNprimary();
	289	if (label < nPrim)
	290	nPrimaries->Fill(particle->Pt());
	291	else
	292	nSecondaries->Fill(particle->Pt());
	293	}
	294
	295	for (Int_t i=1; i<=nPrimaries->GetNbinsX(); ++i)
	296	{
	297	Int_t primaries = (Int_t) nPrimaries->GetBinContent(i);
	298	Int_t secondaries = (Int_t) nSecondaries->GetBinContent(i);
	299
	300	if (primaries + secondaries > 0)
	301	{
	302	AliDebug(AliLog::kDebug, Form("The ratio between primaries and secondaries is %d:%d = %f", primaries, secondaries, ((secondaries > 0) ? (Double_t) primaries / secondaries : -1)));
	303
	304	for (Double_t factor = 0.5; factor < 2.01; factor += 0.1)
9f469bf5	305	{
	306	Double_t nTracks = (Double_t) primaries + (Double_t) secondaries * factor;
	307	fSecondaries->Fill(nTracks, factor, nPrimaries->GetBinCenter(i));
	308	//if (secondaries > 0) printf("We fill: %f %f %f\n", nTracks, factor, nPrimaries->GetBinCenter(i));
	309	}
10ebe68d	310	}
	311	}
	312
f31d5d49	313	fOverallPrimaries += (Int_t) nPrimaries->Integral();
	314	fOverallSecondaries += (Int_t) nSecondaries->Integral();
	315
10ebe68d	316	delete nPrimaries;
	317	nPrimaries = 0;
	318
	319	delete nSecondaries;
	320	nSecondaries = 0;
	321
	322	delete iter;
	323	iter = 0;
	324	}
	325
9f469bf5	326	void AlidNdEtaSystematicsSelector::FillSigmaVertex()
	327	{
	328	// fills the fSigmaVertex histogram
	329
	330	// save the old value
	331	Float_t oldSigmaVertex = fEsdTrackCuts->GetMinNsigmaToVertex();
	332
	333	// set to maximum
	334	fEsdTrackCuts->SetMinNsigmaToVertex(5);
	335
	336	TObjArray* list = fEsdTrackCuts->GetAcceptedTracks(fESD);
	337
	338	TIterator* iter = list->MakeIterator();
	339	TObject* obj = 0;
	340	while ((obj = iter->Next()) != 0)
	341	{
	342	AliESDtrack* esdTrack = dynamic_cast<AliESDtrack*> (obj);
	343	if (!esdTrack)
	344	continue;
	345
	346	Float_t sigma2Vertex = fEsdTrackCuts->GetSigmaToVertex(esdTrack);
	347
	348	for (Double_t nSigma = 0.5; nSigma < 5.1; nSigma += 0.5)
	349	{
	350	if (sigma2Vertex < nSigma)
	351	fSigmaVertex->Fill(nSigma);
	352	}
	353	}
	354
	355	delete iter;
	356	iter = 0;
	357
	358	delete list;
	359	list = 0;
	360
	361	// set back the old value
	362	fEsdTrackCuts->SetMinNsigmaToVertex(oldSigmaVertex);
	363	}
	364
10ebe68d	365	void AlidNdEtaSystematicsSelector::SlaveTerminate()
	366	{
	367	// The SlaveTerminate() function is called after all entries or objects
	368	// have been processed. When running with PROOF SlaveTerminate() is called
	369	// on each slave server.
	370
	371	AliSelector::SlaveTerminate();
	372
	373	// Add the histograms to the output on each slave server
	374	if (!fOutput)
	375	{
	376	AliDebug(AliLog::kError, Form("ERROR: Output list not initialized."));
	377	return;
	378	}
	379
	380	if (fSecondaries)
	381	fOutput->Add(fSecondaries);
	382
	383	for (Int_t i=0; i<4; ++i)
	384	if (fdNdEtaCorrection[i])
	385	fOutput->Add(fdNdEtaCorrection[i]);
9f469bf5	386
	387	if (fSigmaVertex)
	388	fOutput->Add(fSigmaVertex);
10ebe68d	389	}
	390
	391	void AlidNdEtaSystematicsSelector::Terminate()
	392	{
	393	// The Terminate() function is the last function to be called during
	394	// a query. It always runs on the client, it can be used to present
	395	// the results graphically or save the results to file.
	396
	397	AliSelector::Terminate();
	398
	399	fSecondaries = dynamic_cast<TH3F*> (fOutput->FindObject("fSecondaries"));
	400	for (Int_t i=0; i<4; ++i)
	401	fdNdEtaCorrection[i] = dynamic_cast<AlidNdEtaCorrection*> (fOutput->FindObject(Form("correction_%d", i)));
9f469bf5	402	fSigmaVertex = dynamic_cast<TH1F*> (fOutput->FindObject("fSigmaVertex"));
10ebe68d	403
	404	TFile* fout = TFile::Open("systematics.root", "RECREATE");
	405
	406	if (fEsdTrackCuts)
	407	fEsdTrackCuts->SaveHistograms("esd_track_cuts");
	408
	409	if (fSecondaries)
f31d5d49	410	{
10ebe68d	411	fSecondaries->Write();
f31d5d49	412	printf("We had %d primaries and %d secondaries.\n", (Int_t) fOverallPrimaries, (Int_t) fOverallSecondaries);
f31d5d49	413	}
10ebe68d	414
9f469bf5	415	if (fSigmaVertex)
	416	fSigmaVertex->Write();
	417
10ebe68d	418	for (Int_t i=0; i<4; ++i)
	419	if (fdNdEtaCorrection[i])
	420	fdNdEtaCorrection[i]->SaveHistograms();
	421
	422	fout->Write();
	423	fout->Close();
	424
	425	if (fSecondaries)
	426	{
	427	new TCanvas;
	428	fSecondaries->Draw();
	429	}
9f469bf5	430
	431	if (fSigmaVertex)
	432	{
	433	new TCanvas;
	434	fSigmaVertex->Draw();
	435	}
10ebe68d	436	}