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 nBinsN = 22;
  63   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};
  64   //Int_t nBinsN = 52;
  65   //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};
  66
  67   //Float_t binLimitsVtx[] = {-20,-15,-10,-6,-3,0,3,6,10,15,20};
  68   //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};
  69   Float_t binLimitsVtx[] = {-30,-25,-20,-15,-10,-8,-6,-4,-2,0,2,4,6,8,10,15,20,25,30};
  70   Float_t binLimitsEta[] = {-3.0,-2.8,-2.6,-2.4,-2.2,
  71                             -2.0,-1.8,-1.6,-1.4,-1.2,
  72                             -1.0,-0.8,-0.6,-0.4,-0.2, 0.0,
  73                              0.2, 0.4, 0.6, 0.8, 1.0,
  74                              1.2, 1.4, 1.6, 1.8, 2.0,
  75                              2.2, 2.4, 2.6, 2.8, 3.0};
  76 //  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};
  77 //  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};
  78 //  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 };
  79
  80   TH3F* dummyBinning = new TH3F("dummyBinning","dummyBinning",18, binLimitsVtx, 30, binLimitsEta , nBinsPt, binLimitsPt);
  81
  82   fEventCorr = new AliCorrectionMatrix2D("EventCorrection", Form("%s EventCorrection", fTitle.Data()), 18, binLimitsVtx, nBinsN, binLimitsN);
  83   fTrackCorr = new AliCorrectionMatrix3D("TrackCorrection", Form("%s TrackCorrection", fTitle.Data()), dummyBinning);
  84
  85   delete dummyBinning;
  86
  87   fEventCorr->SetAxisTitles("vtx z [cm]", "Ntracks");
  88   fTrackCorr->SetAxisTitles("vtx z [cm]", "#eta", "p_{T} [GeV/c]");
  89 }
  90
  91 //____________________________________________________________________
  92 AliCorrection::AliCorrection(const AliCorrection& c) : TNamed(c),
  93   fEventCorr(0),
  94   fTrackCorr(0)
  95 {
  96   // copy constructor
  97   ((AliCorrection &)c).Copy(*this);
  98 }
  99
 100 //____________________________________________________________________
 101 AliCorrection::~AliCorrection()
 102 {
 103   //
 104   // destructor
 105   //
 106
 107   if (fEventCorr)
 108   {
 109     delete fEventCorr;
 110     fEventCorr = 0;
 111   }
 112
 113   if (fTrackCorr)
 114   {
 115     delete fTrackCorr;
 116     fTrackCorr = 0;
 117   }
 118 }
 119
 120 //____________________________________________________________________
 121 AliCorrection &AliCorrection::operator=(const AliCorrection &c)
 122 {
 123   // assigment operator
 124
 125   if (this != &c)
 126     ((AliCorrection &) c).Copy(*this);
 127
 128   return *this;
 129 }
 130
 131 //____________________________________________________________________
 132 void AliCorrection::Copy(TObject& c) const
 133 {
 134   // copy function
 135
 136   AliCorrection& target = (AliCorrection &) c;
 137
 138   if (fEventCorr)
 139     target.fEventCorr = dynamic_cast<AliCorrectionMatrix2D*> (fEventCorr->Clone());
 140
 141   if (fTrackCorr)
 142     target.fTrackCorr = dynamic_cast<AliCorrectionMatrix3D*> (fTrackCorr->Clone());
 143 }
 144
 145 //____________________________________________________________________
 146 Long64_t AliCorrection::Merge(TCollection* list)
 147 {
 148   // Merge a list of AliCorrection objects with this (needed for
 149   // PROOF).
 150   // Returns the number of merged objects (including this).
 151
 152   if (!list)
 153     return 0;
 154
 155   if (list->IsEmpty())
 156     return 1;
 157
 158   TIterator* iter = list->MakeIterator();
 159   TObject* obj;
 160
 161   // collections of measured and generated histograms
 162   TList* collectionEvent = new TList;
 163   TList* collectionTrack = new TList;
 164
 165   Int_t count = 0;
 166   while ((obj = iter->Next())) {
 167
 168     AliCorrection* entry = dynamic_cast<AliCorrection*> (obj);
 169     if (entry == 0)
 170       continue;
 171
 172     collectionEvent->Add(entry->fEventCorr);
 173     collectionTrack->Add(entry->fTrackCorr);
 174
 175     count++;
 176   }
 177   fEventCorr->Merge(collectionEvent);
 178   fTrackCorr->Merge(collectionTrack);
 179
 180   delete collectionEvent;
 181   delete collectionTrack;
 182
 183   return count+1;
 184 }
 185
 186 //____________________________________________________________________
 187 void AliCorrection::Divide()
 188 {
 189   //
 190   // divide the histograms to get the correction
 191   //
 192
 193   if (!fEventCorr || !fTrackCorr)
 194     return;
 195
 196   fEventCorr->Divide();
 197   fTrackCorr->Divide();
 198
 199   Int_t emptyBins = fTrackCorr->CheckEmptyBins(-9.99, 9.99, -0.79, 0.79, 0.3, 4.9);
 200   printf("INFO: In the central region the track correction of %s has %d empty bins\n", GetName(), emptyBins);
 201 }
 202
 203 //____________________________________________________________________
 204 void AliCorrection::Add(AliCorrection* aCorrectionToAdd, Float_t c)
 205 {
 206   //
 207   // add to measured and generated the measured and generated of aCorrectionToAdd
 208   // with the weight c
 209
 210   fEventCorr->Add(aCorrectionToAdd->GetEventCorrection(),c);
 211   fTrackCorr->Add(aCorrectionToAdd->GetTrackCorrection(),c);
 212 }
 213
 214
 215 //____________________________________________________________________
 216 Bool_t AliCorrection::LoadHistograms(const Char_t* dir)
 217 {
 218   //
 219   // loads the histograms from a file
 220   // if dir is empty a directory with the name of this object is taken (like in SaveHistogram)
 221   //
 222
 223   if (!fEventCorr || !fTrackCorr)
 224     return kFALSE;
 225
 226   if (!dir)
 227     dir = GetName();
 228
 229   if (!gDirectory->cd(dir))
 230     return kFALSE;
 231
 232   Bool_t success = fEventCorr->LoadHistograms();
 233   success &= fTrackCorr->LoadHistograms();
 234
 235   gDirectory->cd("..");
 236
 237   return success;
 238 }
 239
 240 //____________________________________________________________________
 241 void AliCorrection::SaveHistograms()
 242 {
 243   //
 244   // saves the histograms in a directory with the name of this object (GetName)
 245   //
 246
 247   gDirectory->mkdir(GetName());
 248   gDirectory->cd(GetName());
 249
 250   if (fEventCorr)
 251     fEventCorr->SaveHistograms();
 252
 253   if (fTrackCorr)
 254     fTrackCorr->SaveHistograms();
 255
 256   gDirectory->cd("..");
 257 }
 258
 259 //____________________________________________________________________
 260 void AliCorrection::ReduceInformation()
 261 {
 262   // this function deletes the measured and generated histograms to reduce the amount of data
 263   // in memory
 264
 265   if (!fEventCorr || !fTrackCorr)
 266     return;
 267
 268   fEventCorr->ReduceInformation();
 269   fTrackCorr->ReduceInformation();
 270 }
 271
 272 //____________________________________________________________________
 273 void AliCorrection::Reset(Option_t* option)
 274 {
 275   // resets the histograms
 276
 277   if (fEventCorr)
 278     fEventCorr->Reset(option);
 279
 280   if (fTrackCorr)
 281     fTrackCorr->Reset(option);
 282 }
 283
 284 //____________________________________________________________________
 285 void AliCorrection::DrawHistograms(const Char_t* name)
 286 {
 287   // draws the corrections
 288
 289   if (!name)
 290     name = GetName();
 291
 292   if (fEventCorr)
 293     fEventCorr->DrawHistograms(Form("%s event", name));
 294
 295   if (fTrackCorr)
 296     fTrackCorr->DrawHistograms(Form("%s track", name));
 297 }
 298
 299 void AliCorrection::DrawOverview(const char* canvasName)
 300 {
 301   // draw projection of the corrections
 302   //   to the 3 axis of fTrackCorr and 2 axis of fEventCorr
 303
 304   TString canvasNameTmp(GetName());
 305   if (canvasName)
 306     canvasNameTmp = canvasName;
 307
 308   TCanvas* canvas = new TCanvas(canvasNameTmp, canvasNameTmp, 1200, 800);
 309   canvas->Divide(3, 2);
 310
 311   if (fTrackCorr) {
 312     canvas->cd(1);
 313     fTrackCorr->Get1DCorrectionHistogram("x", 0.3, 5, -1, 1)->DrawCopy()->GetYaxis()->SetRangeUser(0, 10);
 314
 315     canvas->cd(2);
 316     fTrackCorr->Get1DCorrectionHistogram("y", 0.3, 5, 0, 0)->DrawCopy()->GetYaxis()->SetRangeUser(0, 10);
 317
 318     canvas->cd(3);
 319     fTrackCorr->Get1DCorrectionHistogram("z", 0, -1, -1, 1)->DrawCopy()->GetYaxis()->SetRangeUser(0, 10);
 320   }
 321
 322   if (fEventCorr)
 323   {
 324     canvas->cd(4);
 325     fEventCorr->Get1DCorrectionHistogram("x")->DrawCopy();
 326
 327     canvas->cd(5);
 328     fEventCorr->Get1DCorrectionHistogram("y")->DrawCopy()->GetXaxis()->SetRangeUser(0, 30);
 329   }
 330 }
 331
 332 //____________________________________________________________________
 333 void AliCorrection::SetCorrectionToUnity()
 334 {
 335   // set the corrections to unity
 336
 337   if (fEventCorr)
 338     fEventCorr->SetCorrectionToUnity();
 339
 340   if (fTrackCorr)
 341     fTrackCorr->SetCorrectionToUnity();
 342 }
 343
 344 //____________________________________________________________________
 345 void AliCorrection::Multiply()
 346 {
 347   // call Multiply
 348
 349   if (fEventCorr)
 350   {
 351     fEventCorr->Multiply();
 352     // now we manually copy the overflow bin of the y axis (multiplicity) over. This is important to get the event count correct
 353     TH2F* hist = fEventCorr->GetMeasuredHistogram();
 354     for (Int_t x = 1; x <= hist->GetNbinsX(); ++x)
 355       fEventCorr->GetGeneratedHistogram()->SetBinContent(x, hist->GetNbinsY() + 1, hist->GetBinContent(x, hist->GetNbinsY() + 1));
 356   }
 357
 358   if (fTrackCorr)
 359     fTrackCorr->Multiply();
 360 }
 361
 362 //____________________________________________________________________
 363 void AliCorrection::Scale(Double_t factor)
 364 {
 365   // scales the two contained corrections
 366
 367   fEventCorr->Scale(factor);
 368   fTrackCorr->Scale(factor);
 369 }
 370
 371 //____________________________________________________________________
 372 void AliCorrection::PrintInfo(Float_t ptCut)
 373 {
 374   // prints some stats
 375
 376   TH3* measured = GetTrackCorrection()->GetMeasuredHistogram();
 377   TH3* generated = GetTrackCorrection()->GetGeneratedHistogram();
 378
 379   TH2* measuredEvents = GetEventCorrection()->GetMeasuredHistogram();
 380   TH2* generatedEvents = GetEventCorrection()->GetGeneratedHistogram();
 381
 382   Printf("AliCorrection::PrintInfo: Whole phasespace:");
 383
 384   Printf("tracks measured: %.1f tracks generated: %.1f, events measured: %.1f, events generated %.1f", measured->Integral(), generated->Integral(), measuredEvents->Integral(), generatedEvents->Integral());
 385
 386   Printf("AliCorrection::PrintInfo: Values in |eta| < 0.8, |vtx-z| < 10 and pt > %.2f:", ptCut);
 387
 388   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());
 389   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());
 390
 391   Float_t eventsM = measuredEvents->Integral(measuredEvents->GetXaxis()->FindBin(-9.9), measuredEvents->GetXaxis()->FindBin(9.9), 1, measuredEvents->GetNbinsY());
 392   Float_t eventsG = generatedEvents->Integral(generatedEvents->GetXaxis()->FindBin(-9.9), generatedEvents->GetXaxis()->FindBin(9.9), 1, generatedEvents->GetNbinsY());
 393
 394   Printf("tracks measured: %.1f tracks generated: %.1f, events measured: %.1f, events generated %.1f", tracksM, tracksG, eventsM, eventsG);
 395
 396   if (tracksM > 0)
 397     Printf("Effective average correction factor for TRACKS: %.3f", tracksG / tracksM);
 398   if (eventsM > 0)
 399   Printf("Effective average correction factor for EVENTS: %.3f", eventsG / eventsM);
 400
 401   if (eventsM > 0 && eventsG > 0)
 402   {
 403     // normalize to number of events;
 404     tracksM /= eventsM;
 405     tracksG /= eventsG;
 406
 407     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);
 408   }
 409 }