PWG0/AliCorrection.cxx

   1 /* $Id$ */
   2
   3 // ------------------------------------------------------
   4 //
   5 // Class to handle corrections.
   6 //
   7 // ------------------------------------------------------
   8 //
   9
  10 #include <TFile.h>
  11 #include <TCanvas.h>
  12 #include <TH3F.h>
  13 #include <TH2F.h>
  14
  15 #include <AliLog.h>
  16 #include "AliCorrectionMatrix2D.h"
  17 #include "AliCorrectionMatrix3D.h"
  18
  19 #include "AliCorrection.h"
  20
  21 //____________________________________________________________________
  22 ClassImp(AliCorrection)
  23
  24 //____________________________________________________________________
  25 AliCorrection::AliCorrection() : TNamed(),
  26   fEventCorr(0),
  27   fTrackCorr(0)
  28 {
  29   // default constructor
  30 }
  31
  32 //____________________________________________________________________
  33 AliCorrection::AliCorrection(const Char_t* name, const Char_t* title, AliPWG0Helper::AnalysisMode analysisMode) : TNamed(name, title),
  34   fEventCorr(0),
  35   fTrackCorr(0)
  36 {
  37   // constructor initializing tnamed
  38
  39   Float_t* binLimitsPt = 0;
  40   Int_t nBinsPt = 0;
  41
  42   // different binnings, better solution could be anticipated...
  43   if (analysisMode == AliPWG0Helper::kTPC || analysisMode == AliPWG0Helper::kTPCITS)
  44   {
  45     static Float_t binLimitsPtTmp[] = {0.0, 0.05, 0.1, 0.125, 0.15, 0.175, 0.2, 0.225, 0.25, 0.275, 0.3, 0.325, 0.35, 0.375, 0.4, 0.425, 0.45, 0.475, 0.5, 0.6, 0.7, 0.8, 0.9, 1.0, 1.5, 2.0, 5.0, 10.0, 100.0};
  46     binLimitsPt = (Float_t*) binLimitsPtTmp;
  47     nBinsPt = 28;
  48   }
  49   else if (analysisMode == AliPWG0Helper::kSPD)
  50   {
  51     static Float_t binLimitsPtTmp[] = {-0.5, 100.0};
  52     binLimitsPt = (Float_t*) binLimitsPtTmp;
  53     nBinsPt = 1;
  54   }
  55
  56   if (!binLimitsPt)
  57   {
  58     Printf("FATAL: Invalid binning");
  59     return;
  60   }
  61
  62   Int_t nBinsN2 = 1;
  63   Float_t binLimitsN2[]   = {-0.5, 1000};
  64   //Int_t nBinsN2 = 21;
  65   //Float_t binLimitsN2[]   = {-0.5, 1.5, 2.5, 3.5, 4.5, 5.5, 6.5, 7.5, 8.5, 9.5, 10.5, 12.5, 14.5, 16.5, 18.5, 20.5, 25.5, 30.5, 40.5, 50.5, 100.5, 1000.5};
  66   Int_t nBinsN = 22;
  67   Float_t binLimitsN[]   = {-0.5, 0.5, 1.5, 2.5, 3.5, 4.5, 5.5, 6.5, 7.5, 8.5, 9.5, 10.5, 12.5, 14.5, 16.5, 18.5, 20.5, 25.5, 30.5, 40.5, 50.5, 100.5, 300.5};
  68   //Int_t nBinsN = 52;
  69   //Float_t binLimitsN[]   = {-0.5, 0.5, 1.5, 2.5, 3.5, 4.5, 5.5, 6.5, 7.5, 8.5, 9.5, 10.5, 11.5, 12.5, 13.5, 14.5, 15.5, 16.5, 17.5, 18.5, 19.5, 20.5, 21.5, 22.5, 23.5, 24.5, 25.5, 26.5, 27.5, 28.5, 29.5, 30.5, 31.5, 32.5, 33.5, 34.5, 35.5, 36.5, 37.5, 38.5, 39.5, 40.5, 41.5, 42.5, 43.5, 44.5, 45.5, 46.5, 47.5, 48.5, 49.5, 50.5, 100.5, 300.5};
  70
  71   //Float_t binLimitsVtx[] = {-20,-15,-10,-6,-3,0,3,6,10,15,20};
  72   //Float_t binLimitsVtx[] = {-20,-19,-18,-17,-16,-15,-14,-13,-12,-11,-10,-9,-8,-7,-6,-5,-4,-3,-2,-1,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20};
  73   Float_t binLimitsVtx[] = {-30,-25,-20,-15,-10,-8,-6,-4,-2,0,2,4,6,8,10,15,20,25,30};
  74   Float_t binLimitsEta[] = {-3.0,-2.8,-2.6,-2.4,-2.2,
  75                             -2.0,-1.8,-1.6,-1.4,-1.2,
  76                             -1.0,-0.8,-0.6,-0.4,-0.2, 0.0,
  77                              0.2, 0.4, 0.6, 0.8, 1.0,
  78                              1.2, 1.4, 1.6, 1.8, 2.0,
  79                              2.2, 2.4, 2.6, 2.8, 3.0};
  80 //  Float_t binLimitsEta[] = {-2,-1.8,-1.6,-1.4,-1.2,-1.0,-0.8,-0.6,-0.4,-0.2,0.0,0.2,0.4,0.6,0.8,1.0,1.2,1.4,1.6,1.8,2.0};
  81 //  Float_t binLimitsEta[] = {-2,-1.9,-1.8,-1.7,-1.6,-1.5,-1.4,-1.3,-1.2,-1.1,-1.0,-0.9,-0.8,-0.7,-0.6,-0.5,-0.4,-0.3,-0.2,-0.1,0.0,0.1,0.2,0.3,0.4,0.5,0.6,0.7,0.8,0.9,1.0,1.1,1.2,1.3,1.4,1.5,1.6,1.7,1.8,1.9,2.0};
  82 //  Float_t binLimitsEta[] = { -7.0, -6.9, -6.8, -6.7, -6.6, -6.5, -6.4, -6.3, -6.2, -6.1, -6.0, -5.9, -5.8, -5.7, -5.6, -5.5, -5.4, -5.3, -5.2, -5.1, -5.0, -4.9, -4.8, -4.7, -4.6, -4.5, -4.4, -4.3, -4.2, -4.1, -4.0, -3.9, -3.8, -3.7, -3.6, -3.5, -3.4, -3.3, -3.2, -3.1, -3.0, -2.9, -2.8, -2.7, -2.6, -2.5, -2.4, -2.3, -2.2, -2.1, -2.0, -1.9, -1.8, -1.7, -1.6, -1.5, -1.4, -1.3, -1.2, -1.1, -1.0, -0.9, -0.8, -0.7, -0.6, -0.5, -0.4, -0.3, -0.2, -0.1, -0.0, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1.0, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9, 2.0, 2.1, 2.2, 2.3, 2.4, 2.5, 2.6, 2.7, 2.8, 2.9, 3.0, 3.1, 3.2, 3.3, 3.4, 3.5, 3.6, 3.7, 3.8, 3.9, 4.0, 4.1, 4.2, 4.3, 4.4, 4.5, 4.6, 4.7, 4.8, 4.9, 5.0, 5.1, 5.2, 5.3, 5.4, 5.5, 5.6, 5.7, 5.8, 5.9, 6.0, 6.1, 6.2, 6.3, 6.4, 6.5, 6.6, 6.7, 6.8, 6.9, 7.0 };
  83
  84   fEventCorr = new AliCorrectionMatrix2D("EventCorrection", Form("%s EventCorrection", fTitle.Data()), 18, binLimitsVtx, nBinsN, binLimitsN);
  85
  86   if (analysisMode == AliPWG0Helper::kSPD)
  87   {
  88     TH3F* dummyBinning = new TH3F("dummyBinning","dummyBinning",18, binLimitsVtx, 30, binLimitsEta, nBinsN2, binLimitsN2);
  89     fTrackCorr = new AliCorrectionMatrix3D("TrackCorrection", Form("%s TrackCorrection", fTitle.Data()), dummyBinning);
  90     fTrackCorr->SetAxisTitles("vtx z [cm]", "#eta", "Ntracks");
  91     delete dummyBinning;
  92   }
  93   else
  94   {
  95     TH3F* dummyBinning = new TH3F("dummyBinning","dummyBinning",18, binLimitsVtx, 30, binLimitsEta , nBinsPt, binLimitsPt);
  96     fTrackCorr = new AliCorrectionMatrix3D("TrackCorrection", Form("%s TrackCorrection", fTitle.Data()), dummyBinning);
  97     fTrackCorr->SetAxisTitles("vtx z [cm]", "#eta", "p_{T} [GeV/c]");
  98     delete dummyBinning;
  99   }
 100
 101
 102   fEventCorr->SetAxisTitles("vtx z [cm]", "Ntracks");
 103 }
 104
 105 //____________________________________________________________________
 106 AliCorrection::AliCorrection(const AliCorrection& c) : TNamed(c),
 107   fEventCorr(0),
 108   fTrackCorr(0)
 109 {
 110   // copy constructor
 111   ((AliCorrection &)c).Copy(*this);
 112 }
 113
 114 //____________________________________________________________________
 115 AliCorrection::~AliCorrection()
 116 {
 117   //
 118   // destructor
 119   //
 120
 121   if (fEventCorr)
 122   {
 123     delete fEventCorr;
 124     fEventCorr = 0;
 125   }
 126
 127   if (fTrackCorr)
 128   {
 129     delete fTrackCorr;
 130     fTrackCorr = 0;
 131   }
 132 }
 133
 134 //____________________________________________________________________
 135 AliCorrection &AliCorrection::operator=(const AliCorrection &c)
 136 {
 137   // assigment operator
 138
 139   if (this != &c)
 140     ((AliCorrection &) c).Copy(*this);
 141
 142   return *this;
 143 }
 144
 145 //____________________________________________________________________
 146 void AliCorrection::Copy(TObject& c) const
 147 {
 148   // copy function
 149
 150   AliCorrection& target = (AliCorrection &) c;
 151
 152   if (fEventCorr)
 153     target.fEventCorr = dynamic_cast<AliCorrectionMatrix2D*> (fEventCorr->Clone());
 154
 155   if (fTrackCorr)
 156     target.fTrackCorr = dynamic_cast<AliCorrectionMatrix3D*> (fTrackCorr->Clone());
 157 }
 158
 159 //____________________________________________________________________
 160 Long64_t AliCorrection::Merge(TCollection* list)
 161 {
 162   // Merge a list of AliCorrection objects with this (needed for
 163   // PROOF).
 164   // Returns the number of merged objects (including this).
 165
 166   if (!list)
 167     return 0;
 168
 169   if (list->IsEmpty())
 170     return 1;
 171
 172   TIterator* iter = list->MakeIterator();
 173   TObject* obj;
 174
 175   // collections of measured and generated histograms
 176   TList* collectionEvent = new TList;
 177   TList* collectionTrack = new TList;
 178
 179   Int_t count = 0;
 180   while ((obj = iter->Next())) {
 181
 182     AliCorrection* entry = dynamic_cast<AliCorrection*> (obj);
 183     if (entry == 0)
 184       continue;
 185
 186     collectionEvent->Add(entry->fEventCorr);
 187     collectionTrack->Add(entry->fTrackCorr);
 188
 189     count++;
 190   }
 191   fEventCorr->Merge(collectionEvent);
 192   fTrackCorr->Merge(collectionTrack);
 193
 194   delete collectionEvent;
 195   delete collectionTrack;
 196
 197   return count+1;
 198 }
 199
 200 //____________________________________________________________________
 201 void AliCorrection::Divide()
 202 {
 203   //
 204   // divide the histograms to get the correction
 205   //
 206
 207   if (!fEventCorr || !fTrackCorr)
 208     return;
 209
 210   fEventCorr->Divide();
 211   fTrackCorr->Divide();
 212
 213   Int_t emptyBins = fTrackCorr->CheckEmptyBins(-9.99, 9.99, -0.79, 0.79, 0.3, 4.9);
 214   printf("INFO: In the central region the track correction of %s has %d empty bins\n", GetName(), emptyBins);
 215 }
 216
 217 //____________________________________________________________________
 218 void AliCorrection::Add(AliCorrection* aCorrectionToAdd, Float_t c)
 219 {
 220   //
 221   // add to measured and generated the measured and generated of aCorrectionToAdd
 222   // with the weight c
 223
 224   fEventCorr->Add(aCorrectionToAdd->GetEventCorrection(),c);
 225   fTrackCorr->Add(aCorrectionToAdd->GetTrackCorrection(),c);
 226 }
 227
 228
 229 //____________________________________________________________________
 230 Bool_t AliCorrection::LoadHistograms(const Char_t* dir)
 231 {
 232   //
 233   // loads the histograms from a file
 234   // if dir is empty a directory with the name of this object is taken (like in SaveHistogram)
 235   //
 236
 237   if (!fEventCorr || !fTrackCorr)
 238     return kFALSE;
 239
 240   if (!dir)
 241     dir = GetName();
 242
 243   if (!gDirectory->cd(dir))
 244     return kFALSE;
 245
 246   Bool_t success = fEventCorr->LoadHistograms();
 247   success &= fTrackCorr->LoadHistograms();
 248
 249   gDirectory->cd("..");
 250
 251   return success;
 252 }
 253
 254 //____________________________________________________________________
 255 void AliCorrection::SaveHistograms()
 256 {
 257   //
 258   // saves the histograms in a directory with the name of this object (GetName)
 259   //
 260
 261   gDirectory->mkdir(GetName());
 262   gDirectory->cd(GetName());
 263
 264   if (fEventCorr)
 265     fEventCorr->SaveHistograms();
 266
 267   if (fTrackCorr)
 268     fTrackCorr->SaveHistograms();
 269
 270   gDirectory->cd("..");
 271 }
 272
 273 //____________________________________________________________________
 274 void AliCorrection::ReduceInformation()
 275 {
 276   // this function deletes the measured and generated histograms to reduce the amount of data
 277   // in memory
 278
 279   if (!fEventCorr || !fTrackCorr)
 280     return;
 281
 282   fEventCorr->ReduceInformation();
 283   fTrackCorr->ReduceInformation();
 284 }
 285
 286 //____________________________________________________________________
 287 void AliCorrection::Reset(Option_t* option)
 288 {
 289   // resets the histograms
 290
 291   if (fEventCorr)
 292     fEventCorr->Reset(option);
 293
 294   if (fTrackCorr)
 295     fTrackCorr->Reset(option);
 296 }
 297
 298 //____________________________________________________________________
 299 void AliCorrection::DrawHistograms(const Char_t* name)
 300 {
 301   // draws the corrections
 302
 303   if (!name)
 304     name = GetName();
 305
 306   if (fEventCorr)
 307     fEventCorr->DrawHistograms(Form("%s event", name));
 308
 309   if (fTrackCorr)
 310     fTrackCorr->DrawHistograms(Form("%s track", name));
 311 }
 312
 313 void AliCorrection::DrawOverview(const char* canvasName)
 314 {
 315   // draw projection of the corrections
 316   //   to the 3 axis of fTrackCorr and 2 axis of fEventCorr
 317
 318   TString canvasNameTmp(GetName());
 319   if (canvasName)
 320     canvasNameTmp = canvasName;
 321
 322   TCanvas* canvas = new TCanvas(canvasNameTmp, canvasNameTmp, 1200, 800);
 323   canvas->Divide(3, 2);
 324
 325   if (fTrackCorr) {
 326     canvas->cd(1);
 327     fTrackCorr->Get1DCorrectionHistogram("x", 0.3, 5, -1, 1)->DrawCopy()->GetYaxis()->SetRangeUser(0, 10);
 328
 329     canvas->cd(2);
 330     fTrackCorr->Get1DCorrectionHistogram("y", 0.3, 5, 0, 0)->DrawCopy()->GetYaxis()->SetRangeUser(0, 10);
 331
 332     canvas->cd(3);
 333     fTrackCorr->Get1DCorrectionHistogram("z", 0, -1, -1, 1)->DrawCopy()->GetYaxis()->SetRangeUser(0, 10);
 334   }
 335
 336   if (fEventCorr)
 337   {
 338     canvas->cd(4);
 339     fEventCorr->Get1DCorrectionHistogram("x")->DrawCopy();
 340
 341     canvas->cd(5);
 342     fEventCorr->Get1DCorrectionHistogram("y")->DrawCopy()->GetXaxis()->SetRangeUser(0, 30);
 343   }
 344 }
 345
 346 //____________________________________________________________________
 347 void AliCorrection::SetCorrectionToUnity()
 348 {
 349   // set the corrections to unity
 350
 351   if (fEventCorr)
 352     fEventCorr->SetCorrectionToUnity();
 353
 354   if (fTrackCorr)
 355     fTrackCorr->SetCorrectionToUnity();
 356 }
 357
 358 //____________________________________________________________________
 359 void AliCorrection::Multiply()
 360 {
 361   // call Multiply
 362
 363   if (fEventCorr)
 364   {
 365     fEventCorr->Multiply();
 366     // now we manually copy the overflow bin of the y axis (multiplicity) over. This is important to get the event count correct
 367     TH2* hist = fEventCorr->GetMeasuredHistogram();
 368     for (Int_t x = 1; x <= hist->GetNbinsX(); ++x)
 369       fEventCorr->GetGeneratedHistogram()->SetBinContent(x, hist->GetNbinsY() + 1, hist->GetBinContent(x, hist->GetNbinsY() + 1));
 370   }
 371
 372   if (fTrackCorr)
 373     fTrackCorr->Multiply();
 374 }
 375
 376 //____________________________________________________________________
 377 void AliCorrection::Scale(Double_t factor)
 378 {
 379   // scales the two contained corrections
 380
 381   fEventCorr->Scale(factor);
 382   fTrackCorr->Scale(factor);
 383 }
 384
 385 //____________________________________________________________________
 386 void AliCorrection::PrintStats(Float_t zRange, Float_t etaRange, Float_t ptCut)
 387 {
 388   // prints statistics and effective correction factors
 389
 390   Printf("AliCorrection::PrintInfo: Values in |eta| < %.2f, |vtx-z| < %.2f and pt > %.2f:", etaRange, zRange, ptCut);
 391
 392   // prevent to be on bin border
 393   zRange -= 0.1;
 394   etaRange -= 0.1;
 395
 396   TH3* measured = GetTrackCorrection()->GetMeasuredHistogram();
 397   TH3* generated = GetTrackCorrection()->GetGeneratedHistogram();
 398
 399   TH2* measuredEvents = GetEventCorrection()->GetMeasuredHistogram();
 400   TH2* generatedEvents = GetEventCorrection()->GetGeneratedHistogram();
 401
 402   Float_t tracksM = measured->Integral(measured->GetXaxis()->FindBin(-zRange), measured->GetXaxis()->FindBin(zRange), measured->GetYaxis()->FindBin(-etaRange), measured->GetYaxis()->FindBin(etaRange), measured->GetZaxis()->FindBin(ptCut), measured->GetZaxis()->GetNbins());
 403   Float_t tracksG = generated->Integral(generated->GetXaxis()->FindBin(-zRange), generated->GetXaxis()->FindBin(zRange), generated->GetYaxis()->FindBin(-etaRange), generated->GetYaxis()->FindBin(etaRange), generated->GetZaxis()->FindBin(ptCut), generated->GetZaxis()->GetNbins());
 404
 405   Float_t eventsM = measuredEvents->Integral(measuredEvents->GetXaxis()->FindBin(-zRange), measuredEvents->GetXaxis()->FindBin(zRange), 1, measuredEvents->GetNbinsY());
 406   Float_t eventsG = generatedEvents->Integral(generatedEvents->GetXaxis()->FindBin(-zRange), generatedEvents->GetXaxis()->FindBin(zRange), 1, generatedEvents->GetNbinsY());
 407
 408   Printf("tracks measured: %.1f tracks generated: %.1f, events measured: %.1f, events generated %.1f", tracksM, tracksG, eventsM, eventsG);
 409
 410   if (tracksM > 0)
 411     Printf("Effective average correction factor for TRACKS: %.3f", tracksG / tracksM);
 412   if (eventsM > 0)
 413     Printf("Effective average correction factor for EVENTS: %.3f", eventsG / eventsM);
 414
 415   if (eventsM > 0 && eventsG > 0)
 416   {
 417     // normalize to number of events;
 418     tracksM /= eventsM;
 419     tracksG /= eventsG;
 420
 421     Printf("%.2f tracks/event measured, %.2f tracks/event after correction --> effective average correction factor is %.3f (pt cut %.2f GeV/c)", tracksM, tracksG, (tracksM > 0) ? (tracksG / tracksM) : -1, ptCut);
 422   }
 423 }
 424
 425 //____________________________________________________________________
 426 void AliCorrection::PrintInfo(Float_t ptCut)
 427 {
 428   // prints some stats
 429
 430   TH3* measured = GetTrackCorrection()->GetMeasuredHistogram();
 431   TH3* generated = GetTrackCorrection()->GetGeneratedHistogram();
 432
 433   TH2* measuredEvents = GetEventCorrection()->GetMeasuredHistogram();
 434   TH2* generatedEvents = GetEventCorrection()->GetGeneratedHistogram();
 435
 436   Printf("AliCorrection::PrintInfo: Whole phasespace:");
 437
 438   Printf("tracks measured: %.1f tracks generated: %.1f, events measured: %.1f, events generated %.1f", measured->Integral(), generated->Integral(), measuredEvents->Integral(), generatedEvents->Integral());
 439
 440   Printf("Example centered bin: tracks measured: %.1f tracks generated: %.1f, events measured: %.1f, events generated %.1f", measured->GetBinContent(measured->GetNbinsX() / 2, measured->GetNbinsY() / 2, measured->GetNbinsZ() / 2), generated->GetBinContent(measured->GetNbinsX() / 2, measured->GetNbinsY() / 2, measured->GetNbinsZ() / 2), measuredEvents->GetBinContent(measuredEvents->GetNbinsX() / 2, measuredEvents->GetNbinsY() / 2), generatedEvents->GetBinContent(measuredEvents->GetNbinsX() / 2, measuredEvents->GetNbinsY() / 2));
 441
 442   PrintStats(10, 1.0, ptCut);
 443   PrintStats(10, 1.5, ptCut);
 444 }