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   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};
  63   //Float_t binLimitsVtx[] = {-20,-15,-10,-6,-3,0,3,6,10,15,20};
  64   //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};
  65   Float_t binLimitsVtx[] = {-20,-15,-10,-8,-6,-4,-2,0,2,4,6,8,10,15,20};
  66   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};
  67 //  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 };
  68
  69   TH3F* dummyBinning = new TH3F("dummyBinning","dummyBinning",14, binLimitsVtx, 40, binLimitsEta , nBinsPt, binLimitsPt);
  70
  71   fEventCorr = new AliCorrectionMatrix2D("EventCorrection", Form("%s EventCorrection", fTitle.Data()), 14, binLimitsVtx, 22, binLimitsN);
  72   fTrackCorr = new AliCorrectionMatrix3D("TrackCorrection", Form("%s TrackCorrection", fTitle.Data()), dummyBinning);
  73
  74   delete dummyBinning;
  75
  76   fEventCorr->SetAxisTitles("vtx z [cm]", "Ntracks");
  77   fTrackCorr->SetAxisTitles("vtx z [cm]", "#eta", "p_{T} [GeV/c]");
  78 }
  79
  80 //____________________________________________________________________
  81 AliCorrection::AliCorrection(const AliCorrection& c) : TNamed(c),
  82   fEventCorr(0),
  83   fTrackCorr(0)
  84 {
  85   // copy constructor
  86   ((AliCorrection &)c).Copy(*this);
  87 }
  88
  89 //____________________________________________________________________
  90 AliCorrection::~AliCorrection()
  91 {
  92   //
  93   // destructor
  94   //
  95
  96   if (fEventCorr)
  97   {
  98     delete fEventCorr;
  99     fEventCorr = 0;
 100   }
 101
 102   if (fTrackCorr)
 103   {
 104     delete fTrackCorr;
 105     fTrackCorr = 0;
 106   }
 107 }
 108
 109 //____________________________________________________________________
 110 AliCorrection &AliCorrection::operator=(const AliCorrection &c)
 111 {
 112   // assigment operator
 113
 114   if (this != &c)
 115     ((AliCorrection &) c).Copy(*this);
 116
 117   return *this;
 118 }
 119
 120 //____________________________________________________________________
 121 void AliCorrection::Copy(TObject& c) const
 122 {
 123   // copy function
 124
 125   AliCorrection& target = (AliCorrection &) c;
 126
 127   if (fEventCorr)
 128     target.fEventCorr = dynamic_cast<AliCorrectionMatrix2D*> (fEventCorr->Clone());
 129
 130   if (fTrackCorr)
 131     target.fTrackCorr = dynamic_cast<AliCorrectionMatrix3D*> (fTrackCorr->Clone());
 132 }
 133
 134 //____________________________________________________________________
 135 Long64_t AliCorrection::Merge(TCollection* list)
 136 {
 137   // Merge a list of AliCorrection objects with this (needed for
 138   // PROOF).
 139   // Returns the number of merged objects (including this).
 140
 141   if (!list)
 142     return 0;
 143
 144   if (list->IsEmpty())
 145     return 1;
 146
 147   TIterator* iter = list->MakeIterator();
 148   TObject* obj;
 149
 150   // collections of measured and generated histograms
 151   TList* collectionEvent = new TList;
 152   TList* collectionTrack = new TList;
 153
 154   Int_t count = 0;
 155   while ((obj = iter->Next())) {
 156
 157     AliCorrection* entry = dynamic_cast<AliCorrection*> (obj);
 158     if (entry == 0)
 159       continue;
 160
 161     collectionEvent->Add(entry->fEventCorr);
 162     collectionTrack->Add(entry->fTrackCorr);
 163
 164     count++;
 165   }
 166   fEventCorr->Merge(collectionEvent);
 167   fTrackCorr->Merge(collectionTrack);
 168
 169   delete collectionEvent;
 170   delete collectionTrack;
 171
 172   return count+1;
 173 }
 174
 175 //____________________________________________________________________
 176 void AliCorrection::Divide()
 177 {
 178   //
 179   // divide the histograms to get the correction
 180   //
 181
 182   if (!fEventCorr || !fTrackCorr)
 183     return;
 184
 185   fEventCorr->Divide();
 186   fTrackCorr->Divide();
 187
 188   Int_t emptyBins = fTrackCorr->CheckEmptyBins(-9.99, 9.99, -0.79, 0.79, 0.3, 4.9);
 189   printf("INFO: In the central region the track correction of %s has %d empty bins\n", GetName(), emptyBins);
 190 }
 191
 192 //____________________________________________________________________
 193 void AliCorrection::Add(AliCorrection* aCorrectionToAdd, Float_t c)
 194 {
 195   //
 196   // add to measured and generated the measured and generated of aCorrectionToAdd
 197   // with the weight c
 198
 199   fEventCorr->Add(aCorrectionToAdd->GetEventCorrection(),c);
 200   fTrackCorr->Add(aCorrectionToAdd->GetTrackCorrection(),c);
 201 }
 202
 203
 204 //____________________________________________________________________
 205 Bool_t AliCorrection::LoadHistograms(const Char_t* dir)
 206 {
 207   //
 208   // loads the histograms from a file
 209   // if dir is empty a directory with the name of this object is taken (like in SaveHistogram)
 210   //
 211
 212   if (!fEventCorr || !fTrackCorr)
 213     return kFALSE;
 214
 215   if (!dir)
 216     dir = GetName();
 217
 218   if (!gDirectory->cd(dir))
 219     return kFALSE;
 220
 221   Bool_t success = fEventCorr->LoadHistograms();
 222   success &= fTrackCorr->LoadHistograms();
 223
 224   gDirectory->cd("..");
 225
 226   return success;
 227 }
 228
 229 //____________________________________________________________________
 230 void AliCorrection::SaveHistograms()
 231 {
 232   //
 233   // saves the histograms in a directory with the name of this object (GetName)
 234   //
 235
 236   gDirectory->mkdir(GetName());
 237   gDirectory->cd(GetName());
 238
 239   if (fEventCorr)
 240     fEventCorr->SaveHistograms();
 241
 242   if (fTrackCorr)
 243     fTrackCorr->SaveHistograms();
 244
 245   gDirectory->cd("..");
 246 }
 247
 248 //____________________________________________________________________
 249 void AliCorrection::ReduceInformation()
 250 {
 251   // this function deletes the measured and generated histograms to reduce the amount of data
 252   // in memory
 253
 254   if (!fEventCorr || !fTrackCorr)
 255     return;
 256
 257   fEventCorr->ReduceInformation();
 258   fTrackCorr->ReduceInformation();
 259 }
 260
 261 //____________________________________________________________________
 262 void AliCorrection::Reset(Option_t* option)
 263 {
 264   // resets the histograms
 265
 266   if (fEventCorr)
 267     fEventCorr->Reset(option);
 268
 269   if (fTrackCorr)
 270     fTrackCorr->Reset(option);
 271 }
 272
 273 //____________________________________________________________________
 274 void AliCorrection::DrawHistograms(const Char_t* name)
 275 {
 276   // draws the corrections
 277
 278   if (!name)
 279     name = GetName();
 280
 281   if (fEventCorr)
 282     fEventCorr->DrawHistograms(Form("%s event", name));
 283
 284   if (fTrackCorr)
 285     fTrackCorr->DrawHistograms(Form("%s track", name));
 286 }
 287
 288 void AliCorrection::DrawOverview(const char* canvasName)
 289 {
 290   // draw projection of the corrections
 291   //   to the 3 axis of fTrackCorr and 2 axis of fEventCorr
 292
 293   TString canvasNameTmp(GetName());
 294   if (canvasName)
 295     canvasNameTmp = canvasName;
 296
 297   TCanvas* canvas = new TCanvas(canvasNameTmp, canvasNameTmp, 1200, 800);
 298   canvas->Divide(3, 2);
 299
 300   if (fTrackCorr) {
 301     canvas->cd(1);
 302     fTrackCorr->Get1DCorrectionHistogram("x", 0.3, 5, -1, 1)->DrawCopy()->GetYaxis()->SetRangeUser(0, 10);
 303
 304     canvas->cd(2);
 305     fTrackCorr->Get1DCorrectionHistogram("y", 0.3, 5, 0, 0)->DrawCopy()->GetYaxis()->SetRangeUser(0, 10);
 306
 307     canvas->cd(3);
 308     fTrackCorr->Get1DCorrectionHistogram("z", 0, -1, -1, 1)->DrawCopy()->GetYaxis()->SetRangeUser(0, 10);
 309   }
 310
 311   if (fEventCorr)
 312   {
 313     canvas->cd(4);
 314     fEventCorr->Get1DCorrectionHistogram("x")->DrawCopy();
 315
 316     canvas->cd(5);
 317     fEventCorr->Get1DCorrectionHistogram("y")->DrawCopy()->GetXaxis()->SetRangeUser(0, 30);
 318   }
 319 }
 320
 321 //____________________________________________________________________
 322 void AliCorrection::SetCorrectionToUnity()
 323 {
 324   // set the corrections to unity
 325
 326   if (fEventCorr)
 327     fEventCorr->SetCorrectionToUnity();
 328
 329   if (fTrackCorr)
 330     fTrackCorr->SetCorrectionToUnity();
 331 }
 332
 333 //____________________________________________________________________
 334 void AliCorrection::Multiply()
 335 {
 336   // call Multiply
 337
 338   if (fEventCorr)
 339   {
 340     fEventCorr->Multiply();
 341     // now we manually copy the overflow bin of the y axis (multiplicity) over. This is important to get the event count correct
 342     TH2F* hist = fEventCorr->GetMeasuredHistogram();
 343     for (Int_t x = 1; x <= hist->GetNbinsX(); ++x)
 344       fEventCorr->GetGeneratedHistogram()->SetBinContent(x, hist->GetNbinsY() + 1, hist->GetBinContent(x, hist->GetNbinsY() + 1));
 345   }
 346
 347   if (fTrackCorr)
 348     fTrackCorr->Multiply();
 349 }
 350
 351 //____________________________________________________________________
 352 void AliCorrection::Scale(Double_t factor)
 353 {
 354   // scales the two contained corrections
 355
 356   fEventCorr->Scale(factor);
 357   fTrackCorr->Scale(factor);
 358 }
 359
 360 //____________________________________________________________________
 361 void AliCorrection::PrintInfo(Float_t ptCut)
 362 {
 363   // prints some stats
 364
 365   TH3* measured = GetTrackCorrection()->GetMeasuredHistogram();
 366   TH3* generated = GetTrackCorrection()->GetGeneratedHistogram();
 367
 368   TH2* measuredEvents = GetEventCorrection()->GetMeasuredHistogram();
 369   TH2* generatedEvents = GetEventCorrection()->GetGeneratedHistogram();
 370
 371   Printf("AliCorrection::PrintInfo: Whole phasespace:");
 372
 373   Printf("tracks measured: %.1f tracks generated: %.1f, events measured: %1.f, events generated %1.f", measured->Integral(), generated->Integral(), measuredEvents->Integral(), generatedEvents->Integral());
 374
 375   Printf("AliCorrection::PrintInfo: Values in |eta| < 0.8, |vtx-z| < 10 and pt > %.2f:", ptCut);
 376
 377   Float_t tracksM = measured->Integral(measured->GetXaxis()->FindBin(-9.9), measured->GetXaxis()->FindBin(9.9), measured->GetYaxis()->FindBin(-0.79), measured->GetYaxis()->FindBin(0.79), measured->GetZaxis()->FindBin(ptCut), measured->GetZaxis()->GetNbins());
 378   Float_t tracksG = generated->Integral(generated->GetXaxis()->FindBin(-9.9), generated->GetXaxis()->FindBin(9.9), generated->GetYaxis()->FindBin(-0.79), generated->GetYaxis()->FindBin(0.79), generated->GetZaxis()->FindBin(ptCut), generated->GetZaxis()->GetNbins());
 379
 380   Float_t eventsM = measuredEvents->Integral(measuredEvents->GetXaxis()->FindBin(-9.9), measuredEvents->GetXaxis()->FindBin(9.9), 1, measuredEvents->GetNbinsY());
 381   Float_t eventsG = generatedEvents->Integral(generatedEvents->GetXaxis()->FindBin(-9.9), generatedEvents->GetXaxis()->FindBin(9.9), 1, generatedEvents->GetNbinsY());
 382
 383   Printf("tracks measured: %.1f tracks generated: %.1f, events measured: %1.f, events generated %1.f", tracksM, tracksG, eventsM, eventsG);
 384
 385   if (tracksM > 0)
 386     Printf("Effective average correction factor for TRACKS: %.3f", tracksG / tracksM);
 387   if (eventsM > 0)
 388   Printf("Effective average correction factor for EVENTS: %.3f", eventsG / eventsM);
 389
 390   if (eventsM > 0 && eventsG > 0)
 391   {
 392     // normalize to number of events;
 393     tracksM /= eventsM;
 394     tracksG /= eventsG;
 395
 396     Printf("%.2f tracks/event measured, %.2f tracks/event after correction --> effective average correction factor is %.3f (pt cut %.2f GeV/c)", tracksM, tracksG, tracksG / tracksM, ptCut);
 397   }
 398 }