PWGUD/base/AlidNdEtaCorrection.cxx

   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 /* $Id$ */
  17
  18 #include "AlidNdEtaCorrection.h"
  19
  20 #include <AliLog.h>
  21 #include <TCanvas.h>
  22 #include <TH3F.h>
  23 #include <TH2F.h>
  24 #include <TH1D.h>
  25 #include <TDirectory.h>
  26 #include <AliCorrection.h>
  27 #include <AliCorrectionMatrix2D.h>
  28 #include <AliCorrectionMatrix3D.h>
  29
  30 //____________________________________________________________________
  31 ClassImp(AlidNdEtaCorrection)
  32
  33 //____________________________________________________________________
  34 AlidNdEtaCorrection::AlidNdEtaCorrection()
  35   : TNamed(),
  36   fTrack2ParticleCorrection(0),
  37   fVertexRecoCorrection(0),
  38   fTriggerBiasCorrectionMBToINEL(0),
  39   fTriggerBiasCorrectionMBToNSD(0),
  40   fTriggerBiasCorrectionMBToND(0),
  41   fTriggerBiasCorrectionMBToOnePart(0)
  42 {
  43   // default constructor
  44 }
  45
  46 //____________________________________________________________________
  47 AlidNdEtaCorrection::AlidNdEtaCorrection(const Char_t* name, const Char_t* title, AliPWG0Helper::AnalysisMode analysis)
  48   : TNamed(name, title),
  49   fTrack2ParticleCorrection(0),
  50   fVertexRecoCorrection(0),
  51   fTriggerBiasCorrectionMBToINEL(0),
  52   fTriggerBiasCorrectionMBToNSD(0),
  53   fTriggerBiasCorrectionMBToND(0),
  54   fTriggerBiasCorrectionMBToOnePart(0)
  55 {
  56   //
  57   // constructor
  58   //
  59
  60   fTrack2ParticleCorrection = new AliCorrection("Track2Particle", "Track2Particle", analysis);
  61   fVertexRecoCorrection     = new AliCorrection("VertexReconstruction", "VertexReconstruction", analysis);
  62
  63   fTriggerBiasCorrectionMBToINEL = new AliCorrection("TriggerBias_MBToINEL", "TriggerBias_MBToINEL", analysis);
  64   fTriggerBiasCorrectionMBToNSD  = new AliCorrection("TriggerBias_MBToNSD", "TriggerBias_MBToNSD", analysis);
  65   fTriggerBiasCorrectionMBToND   = new AliCorrection("TriggerBias_MBToND", "TriggerBias_MBToND", analysis);
  66   fTriggerBiasCorrectionMBToOnePart   = new AliCorrection("TriggerBias_MBToOnePart", "TriggerBias_MBToOnePart", analysis);
  67 }
  68
  69 //____________________________________________________________________
  70 AlidNdEtaCorrection::~AlidNdEtaCorrection()
  71 {
  72   // destructor
  73
  74   if (fTrack2ParticleCorrection) {
  75     delete fTrack2ParticleCorrection;
  76     fTrack2ParticleCorrection = 0;
  77   }
  78
  79   if (fVertexRecoCorrection) {
  80     delete fVertexRecoCorrection;
  81     fVertexRecoCorrection = 0;
  82   }
  83
  84   if (fTriggerBiasCorrectionMBToINEL) {
  85     delete fTriggerBiasCorrectionMBToINEL;
  86     fTriggerBiasCorrectionMBToINEL = 0;
  87   }
  88
  89   if (fTriggerBiasCorrectionMBToNSD) {
  90     delete fTriggerBiasCorrectionMBToNSD;
  91     fTriggerBiasCorrectionMBToNSD = 0;
  92   }
  93
  94   if (fTriggerBiasCorrectionMBToND) {
  95     delete fTriggerBiasCorrectionMBToND;
  96     fTriggerBiasCorrectionMBToND = 0;
  97   }
  98
  99   if (fTriggerBiasCorrectionMBToOnePart) {
 100     delete fTriggerBiasCorrectionMBToOnePart;
 101     fTriggerBiasCorrectionMBToOnePart = 0;
 102   }
 103 }
 104
 105 //____________________________________________________________________
 106 void
 107 AlidNdEtaCorrection::Finish() {
 108   //
 109   // finish method
 110   //
 111   // divide the histograms in the AliCorrectionMatrix2D objects to get the corrections
 112
 113   fTrack2ParticleCorrection->Divide();
 114   fVertexRecoCorrection->Divide();
 115   fTriggerBiasCorrectionMBToINEL->Divide();
 116   fTriggerBiasCorrectionMBToNSD->Divide();
 117   fTriggerBiasCorrectionMBToND->Divide();
 118   fTriggerBiasCorrectionMBToOnePart->Divide();
 119 }
 120
 121 //____________________________________________________________________
 122 Long64_t AlidNdEtaCorrection::Merge(TCollection* list)
 123 {
 124   // Merge a list of dNdEtaCorrection objects with this (needed for
 125   // PROOF).
 126   // Returns the number of merged objects (including this).
 127
 128   if (!list)
 129     return 0;
 130
 131   if (list->IsEmpty())
 132     return 1;
 133
 134   TIterator* iter = list->MakeIterator();
 135   TObject* obj;
 136
 137   // collections of measured and generated histograms
 138   TList* collectionNtrackToNparticle    = new TList;
 139   TList* collectionVertexReco           = new TList;
 140   TList* collectionTriggerBiasMBToINEL  = new TList;
 141   TList* collectionTriggerBiasMBToNSD   = new TList;
 142   TList* collectionTriggerBiasMBToND    = new TList;
 143   TList* collectionTriggerBiasMBToOnePart    = new TList;
 144
 145   Int_t count = 0;
 146   while ((obj = iter->Next())) {
 147
 148     AlidNdEtaCorrection* entry = dynamic_cast<AlidNdEtaCorrection*> (obj);
 149     if (entry == 0)
 150       continue;
 151
 152     collectionNtrackToNparticle  ->Add(entry->fTrack2ParticleCorrection);
 153     collectionVertexReco         ->Add(entry->fVertexRecoCorrection);
 154     collectionTriggerBiasMBToINEL->Add(entry->fTriggerBiasCorrectionMBToINEL);
 155     collectionTriggerBiasMBToNSD ->Add(entry->fTriggerBiasCorrectionMBToNSD);
 156     collectionTriggerBiasMBToND  ->Add(entry->fTriggerBiasCorrectionMBToND);
 157     collectionTriggerBiasMBToOnePart  ->Add(entry->fTriggerBiasCorrectionMBToOnePart);
 158
 159     count++;
 160   }
 161   fTrack2ParticleCorrection      ->Merge(collectionNtrackToNparticle);
 162   fVertexRecoCorrection          ->Merge(collectionVertexReco);
 163   fTriggerBiasCorrectionMBToINEL ->Merge(collectionTriggerBiasMBToINEL);
 164   fTriggerBiasCorrectionMBToNSD  ->Merge(collectionTriggerBiasMBToNSD);
 165   fTriggerBiasCorrectionMBToND   ->Merge(collectionTriggerBiasMBToND);
 166   fTriggerBiasCorrectionMBToOnePart->Merge(collectionTriggerBiasMBToOnePart);
 167
 168   delete collectionNtrackToNparticle;
 169   delete collectionVertexReco;
 170   delete collectionTriggerBiasMBToINEL;
 171   delete collectionTriggerBiasMBToNSD;
 172   delete collectionTriggerBiasMBToND;
 173   delete collectionTriggerBiasMBToOnePart;
 174
 175   return count+1;
 176 }
 177
 178 //____________________________________________________________________
 179 void AlidNdEtaCorrection::Add(AlidNdEtaCorrection* aCorrectionsToAdd, Float_t c) {
 180   //
 181   // adds the measured and generated of aCorrectionsToAdd to measured and generated
 182   // of all corrections in this
 183
 184   fTrack2ParticleCorrection      ->Add(aCorrectionsToAdd->GetTrack2ParticleCorrection() ,c);
 185   fVertexRecoCorrection          ->Add(aCorrectionsToAdd->GetVertexRecoCorrection()     ,c);
 186   fTriggerBiasCorrectionMBToINEL ->Add(aCorrectionsToAdd->GetTriggerBiasCorrectionINEL(),c);
 187   fTriggerBiasCorrectionMBToNSD  ->Add(aCorrectionsToAdd->GetTriggerBiasCorrectionNSD() ,c);
 188   fTriggerBiasCorrectionMBToND   ->Add(aCorrectionsToAdd->GetTriggerBiasCorrectionND()  ,c);
 189   fTriggerBiasCorrectionMBToOnePart   ->Add(aCorrectionsToAdd->GetTriggerBiasCorrectionOnePart()  ,c);
 190 }
 191
 192 //____________________________________________________________________
 193 void AlidNdEtaCorrection::Scale(Float_t c)
 194 {
 195   //
 196   // scales all contained corrections
 197   //
 198
 199   fTrack2ParticleCorrection      ->Scale(c);
 200   fVertexRecoCorrection          ->Scale(c);
 201   fTriggerBiasCorrectionMBToINEL ->Scale(c);
 202   fTriggerBiasCorrectionMBToNSD  ->Scale(c);
 203   fTriggerBiasCorrectionMBToND   ->Scale(c);
 204   fTriggerBiasCorrectionMBToOnePart   ->Scale(c);
 205 }
 206
 207 //____________________________________________________________________
 208 void AlidNdEtaCorrection::Reset(void) {
 209   //
 210   // reset all corrections
 211   //
 212
 213   fTrack2ParticleCorrection      ->Reset();
 214   fVertexRecoCorrection          ->Reset();
 215   fTriggerBiasCorrectionMBToINEL ->Reset();
 216   fTriggerBiasCorrectionMBToNSD  ->Reset();
 217   fTriggerBiasCorrectionMBToND   ->Reset();
 218   fTriggerBiasCorrectionMBToOnePart   ->Reset();
 219 }
 220
 221
 222
 223 //____________________________________________________________________
 224 Bool_t AlidNdEtaCorrection::LoadHistograms(const Char_t* dir)
 225 {
 226   //
 227   // loads the histograms
 228   // if dir is empty a directory with the name of this object is taken (like in SaveHistogram)
 229   //
 230
 231   if (!dir)
 232     dir = GetName();
 233
 234   if (!gDirectory->cd(dir))
 235     return kFALSE;
 236
 237   fTrack2ParticleCorrection      ->LoadHistograms();
 238   fVertexRecoCorrection          ->LoadHistograms();
 239   fTriggerBiasCorrectionMBToINEL ->LoadHistograms();
 240   fTriggerBiasCorrectionMBToNSD  ->LoadHistograms();
 241   fTriggerBiasCorrectionMBToND   ->LoadHistograms();
 242   fTriggerBiasCorrectionMBToOnePart   ->LoadHistograms();
 243
 244   gDirectory->cd("..");
 245
 246   return kTRUE;
 247 }
 248
 249 //____________________________________________________________________
 250 void AlidNdEtaCorrection::SaveHistograms()
 251 {
 252   //
 253   // save the histograms
 254   //
 255
 256   gDirectory->mkdir(fName.Data());
 257   gDirectory->cd(fName.Data());
 258
 259   fTrack2ParticleCorrection     ->SaveHistograms();
 260   fVertexRecoCorrection         ->SaveHistograms();
 261   fTriggerBiasCorrectionMBToINEL->SaveHistograms();
 262   fTriggerBiasCorrectionMBToNSD ->SaveHistograms();
 263   fTriggerBiasCorrectionMBToND  ->SaveHistograms();
 264   fTriggerBiasCorrectionMBToOnePart->SaveHistograms();
 265
 266   gDirectory->cd("..");
 267 }
 268
 269 //____________________________________________________________________
 270 void AlidNdEtaCorrection::DrawHistograms()
 271 {
 272   //
 273   // call the draw histogram method of the corrections
 274   //
 275
 276   fTrack2ParticleCorrection     ->DrawHistograms();
 277   fVertexRecoCorrection         ->DrawHistograms();
 278   fTriggerBiasCorrectionMBToINEL->DrawHistograms();
 279   fTriggerBiasCorrectionMBToNSD ->DrawHistograms();
 280   fTriggerBiasCorrectionMBToND  ->DrawHistograms();
 281   fTriggerBiasCorrectionMBToOnePart  ->DrawHistograms();
 282 }
 283
 284 //____________________________________________________________________
 285 void AlidNdEtaCorrection::DrawOverview(const char* canvasName)
 286 {
 287   //
 288   // call the DrawOverview histogram method of the corrections
 289   //
 290
 291   fTrack2ParticleCorrection     ->DrawOverview(canvasName);
 292   fVertexRecoCorrection         ->DrawOverview(canvasName);
 293   fTriggerBiasCorrectionMBToINEL->DrawOverview(canvasName);
 294   fTriggerBiasCorrectionMBToNSD ->DrawOverview(canvasName);
 295   fTriggerBiasCorrectionMBToND  ->DrawOverview(canvasName);
 296   fTriggerBiasCorrectionMBToOnePart  ->DrawOverview(canvasName);
 297 }
 298
 299 //____________________________________________________________________
 300 void AlidNdEtaCorrection::FillMCParticle(Float_t vtx, Float_t eta, Float_t pt, Bool_t trigger, Bool_t vertex, Int_t processType)
 301 {
 302   // fills a particle in the corrections
 303   // it is filled in generated or measured depending of the flags
 304
 305   fTriggerBiasCorrectionMBToINEL->GetTrackCorrection()->FillGene(vtx, eta, pt);
 306
 307   if ((processType & AliPWG0Helper::kSD) == 0)
 308     fTriggerBiasCorrectionMBToNSD->GetTrackCorrection()->FillGene(vtx, eta, pt);
 309
 310   if (processType & AliPWG0Helper::kND )
 311     fTriggerBiasCorrectionMBToND->GetTrackCorrection()->FillGene(vtx, eta, pt);
 312
 313   if (processType & AliPWG0Helper::kOnePart)
 314     fTriggerBiasCorrectionMBToOnePart->GetTrackCorrection()->FillGene(vtx, eta, pt);
 315
 316   if (!trigger)
 317     return;
 318
 319   fTriggerBiasCorrectionMBToINEL->GetTrackCorrection()->FillMeas(vtx, eta, pt);
 320   fTriggerBiasCorrectionMBToNSD->GetTrackCorrection()->FillMeas(vtx, eta, pt);
 321   fTriggerBiasCorrectionMBToND->GetTrackCorrection()->FillMeas(vtx, eta, pt);
 322   fTriggerBiasCorrectionMBToOnePart->GetTrackCorrection()->FillMeas(vtx, eta, pt);
 323   fVertexRecoCorrection->GetTrackCorrection()->FillGene(vtx, eta, pt);
 324
 325   if (!vertex)
 326     return;
 327
 328   fVertexRecoCorrection->GetTrackCorrection()->FillMeas(vtx, eta, pt);
 329   fTrack2ParticleCorrection->GetTrackCorrection()->FillGene(vtx, eta, pt);
 330 }
 331
 332 //____________________________________________________________________
 333 void AlidNdEtaCorrection::FillTrackedParticle(Float_t vtx, Float_t eta, Float_t pt, Double_t weight)
 334 {
 335   // fills a tracked particle in the corrections
 336
 337   fTrack2ParticleCorrection->GetTrackCorrection()->FillMeas(vtx, eta, pt, weight);
 338 }
 339
 340 //____________________________________________________________________
 341 void AlidNdEtaCorrection::FillEvent(Float_t vtx, Float_t n, Bool_t trigger, Bool_t vertex, Int_t processType)
 342 {
 343   // fills an event int he correction
 344   // it is filled in generated or measured depending of the flags
 345
 346   fTriggerBiasCorrectionMBToINEL->GetEventCorrection()->FillGene(vtx, n);
 347
 348   if ((processType & AliPWG0Helper::kSD) == 0)
 349     fTriggerBiasCorrectionMBToNSD->GetEventCorrection()->FillGene(vtx, n);
 350
 351   if (processType & AliPWG0Helper::kND )
 352     fTriggerBiasCorrectionMBToND->GetEventCorrection()->FillGene(vtx, n);
 353
 354   if (processType & AliPWG0Helper::kOnePart)
 355     fTriggerBiasCorrectionMBToOnePart->GetEventCorrection()->FillGene(vtx, n);
 356
 357   if (!trigger)
 358     return;
 359
 360   fTriggerBiasCorrectionMBToINEL->GetEventCorrection()->FillMeas(vtx, n);
 361   fTriggerBiasCorrectionMBToNSD->GetEventCorrection()->FillMeas(vtx, n);
 362   fTriggerBiasCorrectionMBToND->GetEventCorrection()->FillMeas(vtx, n);
 363   fTriggerBiasCorrectionMBToOnePart->GetEventCorrection()->FillMeas(vtx, n);
 364   fVertexRecoCorrection->GetEventCorrection()->FillGene(vtx, n);
 365
 366   if (!vertex)
 367     return;
 368
 369   fVertexRecoCorrection->GetEventCorrection()->FillMeas(vtx, n);
 370 }
 371
 372 //____________________________________________________________________
 373 Float_t AlidNdEtaCorrection::GetMeasuredFraction(CorrectionType correctionType, Float_t ptCutOff, Float_t eta, Int_t vertexBegin, Int_t vertexEnd, Bool_t debug)
 374 {
 375   // calculates the fraction of particles measured (some are missed due to the pt cut off)
 376   //
 377   // uses the generated particle histogram from the correction passed, e.g. pass GetTrack2ParticleCorrection()
 378
 379   if (!GetCorrection(correctionType))
 380     return -1;
 381
 382   const TH3* generated = GetCorrection(correctionType)->GetTrackCorrection()->GetGeneratedHistogram();
 383
 384   // find eta borders, if eta is negative assume -0.8 ... 0.8
 385   Int_t etaBegin = 0;
 386   Int_t etaEnd = 0;
 387   const TAxis * xax = generated->GetXaxis();
 388   const TAxis * yax = generated->GetYaxis();
 389   if (eta < -99)
 390   {
 391     etaBegin = yax->FindFixBin(-0.8);
 392     etaEnd = yax->FindFixBin(0.8);
 393   }
 394   else
 395   {
 396     etaBegin = yax->FindFixBin(eta);
 397     etaEnd = etaBegin;
 398   }
 399
 400   if (vertexBegin == -1)
 401     vertexBegin = xax->FindFixBin(-9.99);
 402
 403   if (vertexEnd == -1)
 404     vertexEnd = xax->FindFixBin(9.99);
 405
 406   TH1D* ptProj = dynamic_cast<TH1D*> (generated->ProjectionZ(Form("%s_pt", generated->GetName()), vertexBegin, vertexEnd, etaBegin, etaEnd));
 407   //printf("GetMeasuredFraction: bin range %d %d %d %d\n", vertexBegin, vertexEnd, etaBegin, etaEnd);
 408   ptProj->GetXaxis()->SetTitle(generated->GetZaxis()->GetTitle());
 409
 410   Int_t ptBin = ptProj->FindBin(ptCutOff);
 411   //printf("GetMeasuredFraction: bin range %d %d\n", ptBin, ptProj->GetNbinsX());
 412   Float_t abovePtCut = ptProj->Integral(ptBin, ptProj->GetNbinsX()+1);
 413   Float_t all = ptProj->Integral(1, ptProj->GetNbinsX()+1);
 414
 415   if (all == 0)
 416     return -1;
 417
 418   Float_t fraction = abovePtCut / all;
 419
 420   //printf("GetMeasuredFraction: all %f above %f fraction %f\n", all, abovePtCut, fraction);
 421
 422   if (debug)
 423   {
 424     new TCanvas;
 425     ptProj->Draw();
 426   }
 427   else
 428     delete ptProj;
 429
 430   if (debug)
 431     printf("AlidNdEtaCorrection::GetMeasuredFraction: pt cut off = %f, eta = %f, => fraction = %f\n", ptCutOff, eta, fraction);
 432
 433   return fraction;
 434 }
 435
 436 //____________________________________________________________________
 437 TH1* AlidNdEtaCorrection::GetMeasuredEventFraction(CorrectionType correctionType, Int_t multCut)
 438 {
 439   // calculates the fraction of events above multCut (but including it)
 440   //
 441   // uses the generated event histogram from the correction passed, e.g. pass GetTrack2ParticleCorrection()
 442
 443   if (!GetCorrection(correctionType))
 444     return 0;
 445
 446   const TH2* generated = GetCorrection(correctionType)->GetEventCorrection()->GetGeneratedHistogram();
 447
 448   TH1* allEvents = generated->ProjectionX(Form("%s_all", generated->GetName()), 1, generated->GetNbinsY());
 449   TH1* aboveEvents = generated->ProjectionX(Form("%s_above", generated->GetName()), generated->GetYaxis()->FindFixBin(multCut), generated->GetNbinsY());
 450
 451   aboveEvents->Divide(aboveEvents, allEvents, 1, 1, "B");
 452
 453   return aboveEvents;
 454 }
 455
 456 //____________________________________________________________________
 457 void AlidNdEtaCorrection::ReduceInformation()
 458 {
 459   // this function deletes the measured and generated histograms from the corrections to reduce the amount of data
 460   // in memory
 461
 462   // these are needed for GetMeasuredFraction(): fTrack2ParticleCorrection->ReduceInformation();
 463   fVertexRecoCorrection          ->ReduceInformation();
 464   fTriggerBiasCorrectionMBToINEL ->ReduceInformation();
 465   fTriggerBiasCorrectionMBToNSD  ->ReduceInformation();
 466   fTriggerBiasCorrectionMBToND   ->ReduceInformation();
 467   fTriggerBiasCorrectionMBToOnePart   ->ReduceInformation();
 468 }
 469
 470 //____________________________________________________________________
 471 AliCorrection* AlidNdEtaCorrection::GetCorrection(CorrectionType correctionType)
 472 {
 473   // returns the given correction
 474
 475   switch (correctionType)
 476   {
 477     case kNone : return 0;
 478     case kTrack2Particle : return fTrack2ParticleCorrection;
 479     case kVertexReco :     return fVertexRecoCorrection;
 480     case kINEL :           return fTriggerBiasCorrectionMBToINEL;
 481     case kNSD :            return fTriggerBiasCorrectionMBToNSD;
 482     case kND :             return fTriggerBiasCorrectionMBToND;
 483     case kOnePart :             return fTriggerBiasCorrectionMBToOnePart;
 484   }
 485
 486   return 0;
 487 }