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,-1.8,-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};
  67 //  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};
  68 //  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 };
  69
  70   TH3F* dummyBinning = new TH3F("dummyBinning","dummyBinning",14, binLimitsVtx, 20, binLimitsEta , nBinsPt, binLimitsPt);
  71
  72   fEventCorr = new AliCorrectionMatrix2D("EventCorrection", Form("%s EventCorrection", fTitle.Data()), 14, binLimitsVtx, 22, binLimitsN);
  73   fTrackCorr = new AliCorrectionMatrix3D("TrackCorrection", Form("%s TrackCorrection", fTitle.Data()), dummyBinning);
  74
  75   delete dummyBinning;
  76
  77   fEventCorr->SetAxisTitles("vtx z [cm]", "Ntracks");
  78   fTrackCorr->SetAxisTitles("vtx z [cm]", "#eta", "p_{T} [GeV/c]");
  79 }
  80
  81 //____________________________________________________________________
  82 AliCorrection::AliCorrection(const AliCorrection& c) : TNamed(c),
  83   fEventCorr(0),
  84   fTrackCorr(0)
  85 {
  86   // copy constructor
  87   ((AliCorrection &)c).Copy(*this);
  88 }
  89
  90 //____________________________________________________________________
  91 AliCorrection::~AliCorrection()
  92 {
  93   //
  94   // destructor
  95   //
  96
  97   if (fEventCorr)
  98   {
  99     delete fEventCorr;
 100     fEventCorr = 0;
 101   }
 102
 103   if (fTrackCorr)
 104   {
 105     delete fTrackCorr;
 106     fTrackCorr = 0;
 107   }
 108 }
 109
 110 //____________________________________________________________________
 111 AliCorrection &AliCorrection::operator=(const AliCorrection &c)
 112 {
 113   // assigment operator
 114
 115   if (this != &c)
 116     ((AliCorrection &) c).Copy(*this);
 117
 118   return *this;
 119 }
 120
 121 //____________________________________________________________________
 122 void AliCorrection::Copy(TObject& c) const
 123 {
 124   // copy function
 125
 126   AliCorrection& target = (AliCorrection &) c;
 127
 128   if (fEventCorr)
 129     target.fEventCorr = dynamic_cast<AliCorrectionMatrix2D*> (fEventCorr->Clone());
 130
 131   if (fTrackCorr)
 132     target.fTrackCorr = dynamic_cast<AliCorrectionMatrix3D*> (fTrackCorr->Clone());
 133 }
 134
 135 //____________________________________________________________________
 136 Long64_t AliCorrection::Merge(TCollection* list)
 137 {
 138   // Merge a list of AliCorrection objects with this (needed for
 139   // PROOF).
 140   // Returns the number of merged objects (including this).
 141
 142   if (!list)
 143     return 0;
 144
 145   if (list->IsEmpty())
 146     return 1;
 147
 148   TIterator* iter = list->MakeIterator();
 149   TObject* obj;
 150
 151   // collections of measured and generated histograms
 152   TList* collectionEvent = new TList;
 153   TList* collectionTrack = new TList;
 154
 155   Int_t count = 0;
 156   while ((obj = iter->Next())) {
 157
 158     AliCorrection* entry = dynamic_cast<AliCorrection*> (obj);
 159     if (entry == 0)
 160       continue;
 161
 162     collectionEvent->Add(entry->fEventCorr);
 163     collectionTrack->Add(entry->fTrackCorr);
 164
 165     count++;
 166   }
 167   fEventCorr->Merge(collectionEvent);
 168   fTrackCorr->Merge(collectionTrack);
 169
 170   delete collectionEvent;
 171   delete collectionTrack;
 172
 173   return count+1;
 174 }
 175
 176 //____________________________________________________________________
 177 void AliCorrection::Divide()
 178 {
 179   //
 180   // divide the histograms to get the correction
 181   //
 182
 183   if (!fEventCorr || !fTrackCorr)
 184     return;
 185
 186   fEventCorr->Divide();
 187   fTrackCorr->Divide();
 188
 189   Int_t emptyBins = fTrackCorr->CheckEmptyBins(-9.99, 9.99, -0.79, 0.79, 0.3, 4.9);
 190   printf("INFO: In the central region the track correction of %s has %d empty bins\n", GetName(), emptyBins);
 191 }
 192
 193 //____________________________________________________________________
 194 void AliCorrection::Add(AliCorrection* aCorrectionToAdd, Float_t c)
 195 {
 196   //
 197   // add to measured and generated the measured and generated of aCorrectionToAdd
 198   // with the weight c
 199
 200   fEventCorr->Add(aCorrectionToAdd->GetEventCorrection(),c);
 201   fTrackCorr->Add(aCorrectionToAdd->GetTrackCorrection(),c);
 202 }
 203
 204
 205 //____________________________________________________________________
 206 Bool_t AliCorrection::LoadHistograms(const Char_t* dir)
 207 {
 208   //
 209   // loads the histograms from a file
 210   // if dir is empty a directory with the name of this object is taken (like in SaveHistogram)
 211   //
 212
 213   if (!fEventCorr || !fTrackCorr)
 214     return kFALSE;
 215
 216   if (!dir)
 217     dir = GetName();
 218
 219   if (!gDirectory->cd(dir))
 220     return kFALSE;
 221
 222   Bool_t success = fEventCorr->LoadHistograms();
 223   success &= fTrackCorr->LoadHistograms();
 224
 225   gDirectory->cd("..");
 226
 227   return success;
 228 }
 229
 230 //____________________________________________________________________
 231 void AliCorrection::SaveHistograms()
 232 {
 233   //
 234   // saves the histograms in a directory with the name of this object (GetName)
 235   //
 236
 237   gDirectory->mkdir(GetName());
 238   gDirectory->cd(GetName());
 239
 240   if (fEventCorr)
 241     fEventCorr->SaveHistograms();
 242
 243   if (fTrackCorr)
 244     fTrackCorr->SaveHistograms();
 245
 246   gDirectory->cd("..");
 247 }
 248
 249 //____________________________________________________________________
 250 void AliCorrection::ReduceInformation()
 251 {
 252   // this function deletes the measured and generated histograms to reduce the amount of data
 253   // in memory
 254
 255   if (!fEventCorr || !fTrackCorr)
 256     return;
 257
 258   fEventCorr->ReduceInformation();
 259   fTrackCorr->ReduceInformation();
 260 }
 261
 262 //____________________________________________________________________
 263 void AliCorrection::Reset(Option_t* option)
 264 {
 265   // resets the histograms
 266
 267   if (fEventCorr)
 268     fEventCorr->Reset(option);
 269
 270   if (fTrackCorr)
 271     fTrackCorr->Reset(option);
 272 }
 273
 274 //____________________________________________________________________
 275 void AliCorrection::DrawHistograms(const Char_t* name)
 276 {
 277   // draws the corrections
 278
 279   if (!name)
 280     name = GetName();
 281
 282   if (fEventCorr)
 283     fEventCorr->DrawHistograms(Form("%s event", name));
 284
 285   if (fTrackCorr)
 286     fTrackCorr->DrawHistograms(Form("%s track", name));
 287 }
 288
 289 void AliCorrection::DrawOverview(const char* canvasName)
 290 {
 291   // draw projection of the corrections
 292   //   to the 3 axis of fTrackCorr and 2 axis of fEventCorr
 293
 294   TString canvasNameTmp(GetName());
 295   if (canvasName)
 296     canvasNameTmp = canvasName;
 297
 298   TCanvas* canvas = new TCanvas(canvasNameTmp, canvasNameTmp, 1200, 800);
 299   canvas->Divide(3, 2);
 300
 301   if (fTrackCorr) {
 302     canvas->cd(1);
 303     fTrackCorr->Get1DCorrectionHistogram("x", 0.3, 5, -1, 1)->DrawCopy()->GetYaxis()->SetRangeUser(0, 10);
 304
 305     canvas->cd(2);
 306     fTrackCorr->Get1DCorrectionHistogram("y", 0.3, 5, 0, 0)->DrawCopy()->GetYaxis()->SetRangeUser(0, 10);
 307
 308     canvas->cd(3);
 309     fTrackCorr->Get1DCorrectionHistogram("z", 0, -1, -1, 1)->DrawCopy()->GetYaxis()->SetRangeUser(0, 10);
 310   }
 311
 312   if (fEventCorr)
 313   {
 314     canvas->cd(4);
 315     fEventCorr->Get1DCorrectionHistogram("x")->DrawCopy();
 316
 317     canvas->cd(5);
 318     fEventCorr->Get1DCorrectionHistogram("y")->DrawCopy()->GetXaxis()->SetRangeUser(0, 30);
 319   }
 320 }
 321
 322 //____________________________________________________________________
 323 void AliCorrection::SetCorrectionToUnity()
 324 {
 325   // set the corrections to unity
 326
 327   if (fEventCorr)
 328     fEventCorr->SetCorrectionToUnity();
 329
 330   if (fTrackCorr)
 331     fTrackCorr->SetCorrectionToUnity();
 332 }
 333
 334 //____________________________________________________________________
 335 void AliCorrection::Multiply()
 336 {
 337   // call Multiply
 338
 339   if (fEventCorr)
 340   {
 341     fEventCorr->Multiply();
 342     // now we manually copy the overflow bin of the y axis (multiplicity) over. This is important to get the event count correct
 343     TH2F* hist = fEventCorr->GetMeasuredHistogram();
 344     for (Int_t x = 1; x <= hist->GetNbinsX(); ++x)
 345       fEventCorr->GetGeneratedHistogram()->SetBinContent(x, hist->GetNbinsY() + 1, hist->GetBinContent(x, hist->GetNbinsY() + 1));
 346   }
 347
 348   if (fTrackCorr)
 349     fTrackCorr->Multiply();
 350 }
 351
 352 //____________________________________________________________________
 353 void AliCorrection::Scale(Double_t factor)
 354 {
 355   // scales the two contained corrections
 356
 357   fEventCorr->Scale(factor);
 358   fTrackCorr->Scale(factor);
 359 }
 360
 361 //____________________________________________________________________
 362 void AliCorrection::PrintInfo(Float_t ptCut)
 363 {
 364   // prints some stats
 365
 366   TH3* measured = GetTrackCorrection()->GetMeasuredHistogram();
 367   TH3* generated = GetTrackCorrection()->GetGeneratedHistogram();
 368
 369   TH2* measuredEvents = GetEventCorrection()->GetMeasuredHistogram();
 370   TH2* generatedEvents = GetEventCorrection()->GetGeneratedHistogram();
 371
 372   Printf("AliCorrection::PrintInfo: Whole phasespace:");
 373
 374   Printf("tracks measured: %.1f tracks generated: %.1f, events measured: %.1f, events generated %.1f", measured->Integral(), generated->Integral(), measuredEvents->Integral(), generatedEvents->Integral());
 375
 376   Printf("AliCorrection::PrintInfo: Values in |eta| < 0.8, |vtx-z| < 10 and pt > %.2f:", ptCut);
 377
 378   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());
 379   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());
 380
 381   Float_t eventsM = measuredEvents->Integral(measuredEvents->GetXaxis()->FindBin(-9.9), measuredEvents->GetXaxis()->FindBin(9.9), 1, measuredEvents->GetNbinsY());
 382   Float_t eventsG = generatedEvents->Integral(generatedEvents->GetXaxis()->FindBin(-9.9), generatedEvents->GetXaxis()->FindBin(9.9), 1, generatedEvents->GetNbinsY());
 383
 384   Printf("tracks measured: %.1f tracks generated: %.1f, events measured: %.1f, events generated %.1f", tracksM, tracksG, eventsM, eventsG);
 385
 386   if (tracksM > 0)
 387     Printf("Effective average correction factor for TRACKS: %.3f", tracksG / tracksM);
 388   if (eventsM > 0)
 389   Printf("Effective average correction factor for EVENTS: %.3f", eventsG / eventsM);
 390
 391   if (eventsM > 0 && eventsG > 0)
 392   {
 393     // normalize to number of events;
 394     tracksM /= eventsM;
 395     tracksG /= eventsG;
 396
 397     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);
 398   }
 399 }