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 #include <TMath.h>
  15
  16 #include <AliLog.h>
  17 #include "AliCorrectionMatrix2D.h"
  18 #include "AliCorrectionMatrix3D.h"
  19
  20 #include "AliCorrection.h"
  21
  22 //____________________________________________________________________
  23 ClassImp(AliCorrection)
  24
  25 //____________________________________________________________________
  26 AliCorrection::AliCorrection() : TNamed(),
  27   fEventCorr(0),
  28   fTrackCorr(0)
  29 {
  30   // default constructor
  31 }
  32
  33 //____________________________________________________________________
  34 AliCorrection::AliCorrection(const Char_t* name, const Char_t* title, AliPWG0Helper::AnalysisMode analysisMode) : TNamed(name, title),
  35   fEventCorr(0),
  36   fTrackCorr(0)
  37 {
  38   // constructor initializing tnamed
  39
  40   Float_t* binLimitsPt = 0;
  41   Int_t nBinsPt = 0;
  42
  43   // different binnings, better solution could be anticipated...
  44   if ((analysisMode & AliPWG0Helper::kTPC || analysisMode & AliPWG0Helper::kTPCITS) && (analysisMode & AliPWG0Helper::kFieldOn))
  45   {
  46     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};
  47     //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, 1.1, 1.2, 1.3, 1.4, 1.5, 2.0, 5.0, 10.0, 100.0};
  48     binLimitsPt = (Float_t*) binLimitsPtTmp;
  49     nBinsPt = 28;
  50   }
  51   else if (analysisMode & AliPWG0Helper::kSPD || !(analysisMode & AliPWG0Helper::kFieldOn))
  52   {
  53     static Float_t binLimitsPtTmp[] = {-0.5, 100.0};
  54     binLimitsPt = (Float_t*) binLimitsPtTmp;
  55     nBinsPt = 1;
  56   }
  57
  58   if (!binLimitsPt)
  59   {
  60     Printf("FATAL: Invalid binning");
  61     return;
  62   }
  63
  64   // third axis for track histogram
  65   Int_t nBinsN2 = 1;
  66   Float_t binLimitsN2[]   = {-0.5, 1000};
  67   const char* title3 = "Ntracks";
  68
  69   //Int_t nBinsN2 = 21;
  70   //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};
  71
  72   // phi
  73   //Int_t nBinsN2 = 36;
  74   //Float_t binLimitsN2[]   = {0.000, 0.175, 0.349, 0.524, 0.698, 0.873, 1.047, 1.222, 1.396, 1.571, 1.745, 1.920, 2.094, 2.269, 2.443, 2.618, 2.793, 2.967, 3.142, 3.316, 3.491, 3.665, 3.840, 4.014, 4.189, 4.363, 4.538, 4.712, 4.887, 5.061, 5.236, 5.411, 5.585, 5.760, 5.934, 6.109, TMath::Pi() * 2};
  75   //const char* title3 = "#phi";
  76
  77   // mult axis for event histogram
  78   Int_t nBinsN = 22;
  79   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};
  80   //Int_t nBinsN = 8;
  81   //Float_t binLimitsN[]   = {-0.5, 0.5, 1.5, 2.5, 3.5, 4.5, 5.5, 6.5, 300.5};
  82   //Int_t nBinsN = 52;
  83   //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};
  84
  85   //Float_t binLimitsVtx[] = {-20,-15,-10,-6,-3,0,3,6,10,15,20};
  86   //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};
  87   //Float_t binLimitsVtx[] = {-30,-25,-20,-15,-10,-8,-6,-4,-2,0,2,4,6,8,10,15,20,25,30};
  88   Float_t binLimitsVtx[] = {-30,-25,-20,-15,-10,-7,-5.5,-4,-3,-2,-1,0,1,2,3,4,5.5,7,10,15,20,25,30};
  89   /*Float_t binLimitsEta[] = {-3.0,-2.8,-2.6,-2.4,-2.2,
  90                             -2.0,-1.8,-1.6,-1.4,-1.2,
  91                             -1.0,-0.8,-0.6,-0.4,-0.2, 0.0,
  92                              0.2, 0.4, 0.6, 0.8, 1.0,
  93                              1.2, 1.4, 1.6, 1.8, 2.0,
  94                              2.2, 2.4, 2.6, 2.8, 3.0};*/
  95   //Float_t binLimitsEta[] = { -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 };
  96   /*Float_t binLimitsEta[] = {-3,-2.75,-2.5,-2.25,-2.0,
  97                             -1.75,-1.5,-1.25,
  98                             -1,-0.75,-0.5,-0.25,
  99                             0,0.25,0.5,0.75,
 100                             1.0,1.25,1.5,1.75,
 101                             2.0,2.25,2.5,2.75,3.0}; */
 102   //Float_t binLimitsEta[] = {-2.8,-2.4,-2,-1.6,-1.2,-0.8,-0.4,0,0.4,0.8,1.2,1.6,2.0,2.4,2.8};
 103   //Float_t binLimitsEta[] = {-2.8,-2.4,-2,-1.6,-1.2,-0.8,-0.5,0,0.5,0.8,1.2,1.6,2.0,2.4,2.8};
 104
 105   //Float_t binLimitsEta[] = {-3,-2.6,-2.2,-1.8,-1.4,-1,-0.6,-0.2,0.2,0.6,1,1.4,1.8,2.2,2.6,3.0};
 106   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};
 107 //  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 };
 108
 109   fEventCorr = new AliCorrectionMatrix2D("EventCorrection", Form("%s EventCorrection", fTitle.Data()), 22, binLimitsVtx, nBinsN, binLimitsN);
 110
 111   if (analysisMode & AliPWG0Helper::kSPD)
 112   {
 113     TH3F* dummyBinning = new TH3F("dummyBinning","dummyBinning",22, binLimitsVtx, 40, binLimitsEta, nBinsN2, binLimitsN2);
 114     fTrackCorr = new AliCorrectionMatrix3D("TrackCorrection", Form("%s TrackCorrection", fTitle.Data()), dummyBinning);
 115     fTrackCorr->SetAxisTitles("vtx-z (cm)", "#eta", title3);
 116     delete dummyBinning;
 117   }
 118   else
 119   {
 120     TH3F* dummyBinning = new TH3F("dummyBinning","dummyBinning",22, binLimitsVtx, 40, binLimitsEta , nBinsPt, binLimitsPt);
 121     fTrackCorr = new AliCorrectionMatrix3D("TrackCorrection", Form("%s TrackCorrection", fTitle.Data()), dummyBinning);
 122     fTrackCorr->SetAxisTitles("vtx-z (cm)", "#eta", "p_{T} (GeV/c)");
 123     delete dummyBinning;
 124   }
 125
 126
 127   fEventCorr->SetAxisTitles("vtx-z (cm)", "Ntracks");
 128 }
 129
 130 //____________________________________________________________________
 131 AliCorrection::AliCorrection(const AliCorrection& c) : TNamed(c),
 132   fEventCorr(0),
 133   fTrackCorr(0)
 134 {
 135   // copy constructor
 136   ((AliCorrection &)c).Copy(*this);
 137 }
 138
 139 //____________________________________________________________________
 140 AliCorrection::~AliCorrection()
 141 {
 142   //
 143   // destructor
 144   //
 145
 146   if (fEventCorr)
 147   {
 148     delete fEventCorr;
 149     fEventCorr = 0;
 150   }
 151
 152   if (fTrackCorr)
 153   {
 154     delete fTrackCorr;
 155     fTrackCorr = 0;
 156   }
 157 }
 158
 159 //____________________________________________________________________
 160 AliCorrection &AliCorrection::operator=(const AliCorrection &c)
 161 {
 162   // assigment operator
 163
 164   if (this != &c)
 165     ((AliCorrection &) c).Copy(*this);
 166
 167   return *this;
 168 }
 169
 170 //____________________________________________________________________
 171 void AliCorrection::Copy(TObject& c) const
 172 {
 173   // copy function
 174
 175   AliCorrection& target = (AliCorrection &) c;
 176
 177   if (fEventCorr)
 178     target.fEventCorr = dynamic_cast<AliCorrectionMatrix2D*> (fEventCorr->Clone());
 179
 180   if (fTrackCorr)
 181     target.fTrackCorr = dynamic_cast<AliCorrectionMatrix3D*> (fTrackCorr->Clone());
 182 }
 183
 184 //____________________________________________________________________
 185 Long64_t AliCorrection::Merge(TCollection* list)
 186 {
 187   // Merge a list of AliCorrection objects with this (needed for
 188   // PROOF).
 189   // Returns the number of merged objects (including this).
 190
 191   if (!list)
 192     return 0;
 193
 194   if (list->IsEmpty())
 195     return 1;
 196
 197   TIterator* iter = list->MakeIterator();
 198   TObject* obj;
 199
 200   // collections of measured and generated histograms
 201   TList* collectionEvent = new TList;
 202   TList* collectionTrack = new TList;
 203
 204   Int_t count = 0;
 205   while ((obj = iter->Next())) {
 206
 207     AliCorrection* entry = dynamic_cast<AliCorrection*> (obj);
 208     if (entry == 0)
 209       continue;
 210
 211     collectionEvent->Add(entry->fEventCorr);
 212     collectionTrack->Add(entry->fTrackCorr);
 213
 214     count++;
 215   }
 216   fEventCorr->Merge(collectionEvent);
 217   fTrackCorr->Merge(collectionTrack);
 218
 219   delete collectionEvent;
 220   delete collectionTrack;
 221
 222   return count+1;
 223 }
 224
 225 //____________________________________________________________________
 226 void AliCorrection::Divide()
 227 {
 228   //
 229   // divide the histograms to get the correction
 230   //
 231
 232   if (!fEventCorr || !fTrackCorr)
 233     return;
 234
 235   fEventCorr->Divide();
 236   fTrackCorr->Divide();
 237
 238   Int_t emptyBins = fTrackCorr->CheckEmptyBins(-9.99, 9.99, -0.79, 0.79, 0.2, 4.9);
 239   printf("INFO: In the central region the track correction of %s has %d empty bins\n", GetName(), emptyBins);
 240 }
 241
 242 //____________________________________________________________________
 243 void AliCorrection::Add(AliCorrection* aCorrectionToAdd, Float_t c)
 244 {
 245   //
 246   // add to measured and generated the measured and generated of aCorrectionToAdd
 247   // with the weight c
 248
 249   fEventCorr->Add(aCorrectionToAdd->GetEventCorrection(),c);
 250   fTrackCorr->Add(aCorrectionToAdd->GetTrackCorrection(),c);
 251 }
 252
 253
 254 //____________________________________________________________________
 255 Bool_t AliCorrection::LoadHistograms(const Char_t* dir)
 256 {
 257   //
 258   // loads the histograms from a file
 259   // if dir is empty a directory with the name of this object is taken (like in SaveHistogram)
 260   //
 261
 262   if (!fEventCorr || !fTrackCorr)
 263     return kFALSE;
 264
 265   if (!dir)
 266     dir = GetName();
 267
 268   if (!gDirectory->cd(dir))
 269     return kFALSE;
 270
 271   Bool_t success = fEventCorr->LoadHistograms();
 272   success &= fTrackCorr->LoadHistograms();
 273
 274   gDirectory->cd("..");
 275
 276   return success;
 277 }
 278
 279 //____________________________________________________________________
 280 void AliCorrection::SaveHistograms()
 281 {
 282   //
 283   // saves the histograms in a directory with the name of this object (GetName)
 284   //
 285
 286   gDirectory->mkdir(GetName());
 287   gDirectory->cd(GetName());
 288
 289   if (fEventCorr)
 290     fEventCorr->SaveHistograms();
 291
 292   if (fTrackCorr)
 293     fTrackCorr->SaveHistograms();
 294
 295   gDirectory->cd("..");
 296 }
 297
 298 //____________________________________________________________________
 299 void AliCorrection::ReduceInformation()
 300 {
 301   // this function deletes the measured and generated histograms to reduce the amount of data
 302   // in memory
 303
 304   if (!fEventCorr || !fTrackCorr)
 305     return;
 306
 307   fEventCorr->ReduceInformation();
 308   fTrackCorr->ReduceInformation();
 309 }
 310
 311 //____________________________________________________________________
 312 void AliCorrection::Reset(Option_t* option)
 313 {
 314   // resets the histograms
 315
 316   if (fEventCorr)
 317     fEventCorr->Reset(option);
 318
 319   if (fTrackCorr)
 320     fTrackCorr->Reset(option);
 321 }
 322
 323 //____________________________________________________________________
 324 void AliCorrection::DrawHistograms(const Char_t* name)
 325 {
 326   // draws the corrections
 327
 328   if (!name)
 329     name = GetName();
 330
 331   if (fEventCorr)
 332     fEventCorr->DrawHistograms(Form("%s event", name));
 333
 334   if (fTrackCorr)
 335     fTrackCorr->DrawHistograms(Form("%s track", name));
 336 }
 337
 338 void AliCorrection::DrawOverview(const char* canvasName)
 339 {
 340   // draw projection of the corrections
 341   //   to the 3 axis of fTrackCorr and 2 axis of fEventCorr
 342
 343   TString canvasNameTmp(GetName());
 344   if (canvasName)
 345     canvasNameTmp = canvasName;
 346
 347   TCanvas* canvas = new TCanvas(canvasNameTmp, canvasNameTmp, 1200, 1200);
 348   canvas->Divide(3, 3);
 349
 350   if (fTrackCorr) {
 351     canvas->cd(1);
 352     fTrackCorr->Get2DCorrectionHistogram("xy", 0, 0)->DrawCopy("COLZ")->GetZaxis()->SetRangeUser(0, 10);
 353
 354     canvas->cd(2);
 355     fTrackCorr->Get2DCorrectionHistogram("yz", 0, 0)->DrawCopy("COLZ")->GetZaxis()->SetRangeUser(0, 10);
 356
 357     canvas->cd(3);
 358     fTrackCorr->Get2DCorrectionHistogram("zx", 0, 0)->DrawCopy("COLZ")->GetZaxis()->SetRangeUser(0, 10);
 359
 360     canvas->cd(4);
 361     fTrackCorr->Get1DCorrectionHistogram("x", 0.3, 5, -1, 1)->DrawCopy()->GetYaxis()->SetRangeUser(0, 10);
 362
 363     canvas->cd(5);
 364     fTrackCorr->Get1DCorrectionHistogram("y", 0.3, 5, 0, 0)->DrawCopy()->GetYaxis()->SetRangeUser(0, 10);
 365
 366     canvas->cd(6);
 367     fTrackCorr->Get1DCorrectionHistogram("z", 0, -1, -1, 1)->DrawCopy()->GetYaxis()->SetRangeUser(0, 10);
 368   }
 369
 370   if (fEventCorr)
 371   {
 372     canvas->cd(7);
 373     fEventCorr->GetCorrectionHistogram()->DrawCopy("COLZ")->GetYaxis()->SetRangeUser(0, 30);
 374
 375     canvas->cd(8);
 376     fEventCorr->Get1DCorrectionHistogram("x")->DrawCopy();
 377
 378     canvas->cd(9);
 379     fEventCorr->Get1DCorrectionHistogram("y")->DrawCopy()->GetXaxis()->SetRangeUser(0, 30);
 380   }
 381 }
 382
 383 //____________________________________________________________________
 384 void AliCorrection::SetCorrectionToUnity()
 385 {
 386   // set the corrections to unity
 387
 388   if (fEventCorr)
 389     fEventCorr->SetCorrectionToUnity();
 390
 391   if (fTrackCorr)
 392     fTrackCorr->SetCorrectionToUnity();
 393 }
 394
 395 //____________________________________________________________________
 396 void AliCorrection::Multiply()
 397 {
 398   // call Multiply
 399
 400   if (fEventCorr)
 401   {
 402     fEventCorr->Multiply();
 403     // now we manually copy the overflow bin of the y axis (multiplicity) over. This is important to get the event count correct
 404     TH2* hist = fEventCorr->GetMeasuredHistogram();
 405     for (Int_t x = 1; x <= hist->GetNbinsX(); ++x)
 406       fEventCorr->GetGeneratedHistogram()->SetBinContent(x, hist->GetNbinsY() + 1, hist->GetBinContent(x, hist->GetNbinsY() + 1));
 407   }
 408
 409   if (fTrackCorr)
 410     fTrackCorr->Multiply();
 411 }
 412
 413 //____________________________________________________________________
 414 void AliCorrection::Scale(Double_t factor)
 415 {
 416   // scales the two contained corrections
 417
 418   fEventCorr->Scale(factor);
 419   fTrackCorr->Scale(factor);
 420 }
 421
 422 //____________________________________________________________________
 423 void AliCorrection::PrintStats(Float_t zRange, Float_t etaRange, Float_t ptCut)
 424 {
 425   // prints statistics and effective correction factors
 426
 427   Printf("AliCorrection::PrintInfo: Values in |eta| < %.2f, |vtx-z| < %.2f and pt > %.2f:", etaRange, zRange, ptCut);
 428
 429   // prevent to be on bin border
 430   zRange -= 0.1;
 431   etaRange -= 0.1;
 432
 433   TH3* measured = GetTrackCorrection()->GetMeasuredHistogram();
 434   TH3* generated = GetTrackCorrection()->GetGeneratedHistogram();
 435
 436   TH2* measuredEvents = GetEventCorrection()->GetMeasuredHistogram();
 437   TH2* generatedEvents = GetEventCorrection()->GetGeneratedHistogram();
 438
 439   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());
 440   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());
 441
 442   Float_t eventsM = measuredEvents->Integral(measuredEvents->GetXaxis()->FindBin(-zRange), measuredEvents->GetXaxis()->FindBin(zRange), 1, measuredEvents->GetNbinsY());
 443   Float_t eventsG = generatedEvents->Integral(generatedEvents->GetXaxis()->FindBin(-zRange), generatedEvents->GetXaxis()->FindBin(zRange), 1, generatedEvents->GetNbinsY());
 444
 445   Float_t eventsM1 = measuredEvents->Integral(measuredEvents->GetXaxis()->FindBin(-zRange), measuredEvents->GetXaxis()->FindBin(zRange), 2, measuredEvents->GetNbinsY());
 446   Float_t eventsG1 = generatedEvents->Integral(generatedEvents->GetXaxis()->FindBin(-zRange), generatedEvents->GetXaxis()->FindBin(zRange), 2, generatedEvents->GetNbinsY());
 447
 448   Printf("tracks measured: %.1f tracks generated: %.1f, events measured: %.1f, events generated %.1f, events (N>0) measured: %.1f, events (N>0) generated %.1f", tracksM, tracksG, eventsM, eventsG, eventsM1, eventsG1);
 449
 450   if (tracksM > 0)
 451     Printf("Effective average correction factor for TRACKS: %.3f", tracksG / tracksM);
 452   if (eventsM > 0)
 453     Printf("Effective average correction factor for EVENTS: %.3f", eventsG / eventsM);
 454
 455   if (eventsM > 0 && eventsG > 0)
 456   {
 457     // normalize to number of events;
 458     tracksM /= eventsM;
 459     tracksG /= eventsG;
 460
 461     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);
 462   }
 463 }
 464
 465 //____________________________________________________________________
 466 void AliCorrection::PrintInfo(Float_t ptCut)
 467 {
 468   // prints some stats
 469
 470   TH3* measured = GetTrackCorrection()->GetMeasuredHistogram();
 471   TH3* generated = GetTrackCorrection()->GetGeneratedHistogram();
 472
 473   TH2* measuredEvents = GetEventCorrection()->GetMeasuredHistogram();
 474   TH2* generatedEvents = GetEventCorrection()->GetGeneratedHistogram();
 475
 476   Printf("AliCorrection::PrintInfo: Whole phasespace:");
 477
 478   Printf("tracks measured: %.1f tracks generated: %.1f, events measured: %.1f, events generated %.1f", measured->Integral(), generated->Integral(), measuredEvents->Integral(), generatedEvents->Integral());
 479
 480   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));
 481
 482   PrintStats(10, 0.6, ptCut);
 483   PrintStats(10, 0.8, ptCut);
 484   PrintStats(10, 1.5, ptCut);
 485 }
 486
 487 //____________________________________________________________________
 488 void AliCorrection::ResetErrorsOnCorrections()
 489 {
 490   // resets the errors in the correction matrix
 491
 492   fEventCorr->ResetErrorsOnCorrections();
 493   fTrackCorr->ResetErrorsOnCorrections();
 494 }