PWG1/AliPerformanceDEdx.cxx

   1 //------------------------------------------------------------------------------
   2 // Implementation of AliPerformanceDEdx class. It keeps information from
   3 // comparison of reconstructed and MC particle tracks. In addtion,
   4 // it keeps selection cuts used during comparison. The comparison
   5 // information is stored in the ROOT histograms. Analysis of these
   6 // histograms can be done by using Analyse() class function. The result of
   7 // the analysis (histograms/graphs) are stored in the folder which is
   8 // a data of AliPerformanceDEdx.
   9 //
  10 // Author: J.Otwinowski 04/02/2008
  11 //------------------------------------------------------------------------------
  12
  13 /*
  14
  15   // after running comparison task, read the file, and get component
  16   gROOT->LoadMacro("$ALICE_ROOT/PWG1/Macros/LoadMyLibs.C");
  17   LoadMyLibs();
  18   TFile f("Output.root");
  19   //AliPerformanceDEdx * compObj = (AliPerformanceDEdx*)f.Get("AliPerformanceDEdx");
  20   AliPerformanceDEdx * compObj = (AliPerformanceDEdx*)coutput->FindObject("AliPerformanceDEdx");
  21
  22   // Analyse comparison data
  23   compObj->Analyse();
  24
  25   // the output histograms/graphs will be stored in the folder "folderDEdx"
  26   compObj->GetAnalysisFolder()->ls("*");
  27
  28   // user can save whole comparison object (or only folder with anlysed histograms)
  29   // in the seperate output file (e.g.)
  30   TFile fout("Analysed_DEdx.root"."recreate");
  31   compObj->Write(); // compObj->GetAnalysisFolder()->Write();
  32   fout.Close();
  33
  34 */
  35
  36 #include <TDirectory.h>
  37 #include <TAxis.h>
  38 #include <TCanvas.h>
  39 #include <TH1.h>
  40 #include <TH2.h>
  41 #include <TF1.h>
  42
  43 #include "AliPerformanceDEdx.h"
  44 #include "AliESDEvent.h"
  45 #include "AliMCEvent.h"
  46 #include "AliESDtrack.h"
  47 #include "AliStack.h"
  48 #include "AliLog.h"
  49 #include "AliMCInfoCuts.h"
  50 #include "AliMathBase.h"
  51 #include "AliRecInfoCuts.h"
  52 #include "AliTreeDraw.h"
  53 #include "AliHeader.h"
  54 #include "AliGenEventHeader.h"
  55
  56 using namespace std;
  57
  58 ClassImp(AliPerformanceDEdx)
  59
  60 //_____________________________________________________________________________
  61 AliPerformanceDEdx::AliPerformanceDEdx():
  62   AliPerformanceObject("AliPerformanceDEdx"),
  63
  64   // dEdx
  65   fDeDxHisto(0),
  66
  67   // Cuts
  68   fCutsRC(0),
  69   fCutsMC(0),
  70
  71   // histogram folder
  72   fAnalysisFolder(0)
  73 {
  74   // default constructor
  75   Init();
  76 }
  77
  78 //_____________________________________________________________________________
  79 AliPerformanceDEdx::AliPerformanceDEdx(Char_t* name="AliPerformanceDEdx", Char_t* title="AliPerformanceDEdx",Int_t analysisMode=0, Bool_t hptGenerator=kFALSE):
  80   AliPerformanceObject(name,title),
  81
  82   // dEdx
  83   fDeDxHisto(0),
  84
  85   // Cuts
  86   fCutsRC(0),
  87   fCutsMC(0),
  88
  89   // histogram folder
  90   fAnalysisFolder(0)
  91 {
  92   // named constructor
  93
  94   SetAnalysisMode(analysisMode);
  95   SetHptGenerator(hptGenerator);
  96   Init();
  97 }
  98
  99
 100 //_____________________________________________________________________________
 101 AliPerformanceDEdx::~AliPerformanceDEdx()
 102 {
 103   // destructor
 104   if(fDeDxHisto)  delete fDeDxHisto; fDeDxHisto=0;
 105   if(fAnalysisFolder) delete fAnalysisFolder; fAnalysisFolder=0;
 106 }
 107
 108 //_____________________________________________________________________________
 109 void AliPerformanceDEdx::Init()
 110 {
 111   // Init histograms
 112
 113   // TPC dEdx
 114   // set pt bins
 115   Int_t nPBins = 50;
 116   Double_t pMin = 1.e-2, pMax = 10.;
 117
 118   Double_t *binsP = 0;
 119   if (IsHptGenerator())  {
 120     nPBins = 100; pMax = 100.;
 121     binsP = CreateLogAxis(nPBins,pMin,pMax);
 122   } else {
 123     binsP = CreateLogAxis(nPBins,pMin,pMax);
 124   }
 125
 126
 127   /*
 128   Int_t nPBins = 31;
 129     Double_t binsP[32] = {0.,0.05,0.1,0.15,0.2,0.25,0.3,0.35,0.4,0.45,0.5,0.55,0.6,0.7,0.8,0.9,1.0,1.2,1.4,1.6,1.8,2.0,2.25,2.5,2.75,3.,3.5,4.,5.,6.,8.,10.};
 130     Double_t pMin = 0., pMax = 10.;
 131
 132     if(IsHptGenerator() == kTRUE) {
 133       nPBins = 100;
 134       pMin = 0.; pMax = 100.;
 135     }
 136    */
 137
 138    //dedx:alpha:y:z:snp:tgl:ncls:p
 139    //dedx:phi:y:z:snp:tgl:ncls:p
 140    //Int_t binsQA[8]    = {300, 50, 50,  50, 50, 50, 80, nPBins};
 141    //Double_t xminQA[8] = {0, -4,-20,-250, -1, -2, 0, pMin};
 142    //Double_t xmaxQA[8] = {300, 4, 20, 250,  1,  2, 160, pMax};
 143    Int_t binsQA[8]    = {300, 144, 50,  50, 50, 50, 80, nPBins};
 144    Double_t xminQA[8] = {0, -TMath::Pi(),-20,-250, -1, -2, 0, pMin};
 145    Double_t xmaxQA[8] = {300, TMath::Pi(), 20, 250,  1,  2, 160, pMax};
 146
 147    //fDeDxHisto = new THnSparseF("fDeDxHisto","dedx:alpha:y:z:snp:tgl:ncls:momentum",8,binsQA,xminQA,xmaxQA);
 148    fDeDxHisto = new THnSparseF("fDeDxHisto","dedx:phi:y:z:snp:tgl:ncls:momentum",8,binsQA,xminQA,xmaxQA);
 149    fDeDxHisto->SetBinEdges(7,binsP);
 150
 151    fDeDxHisto->GetAxis(0)->SetTitle("dedx (a.u.)");
 152    fDeDxHisto->GetAxis(1)->SetTitle("#phi (rad)");
 153    fDeDxHisto->GetAxis(2)->SetTitle("y (cm)");
 154    fDeDxHisto->GetAxis(3)->SetTitle("z (cm)");
 155    fDeDxHisto->GetAxis(4)->SetTitle("sin#phi");
 156    fDeDxHisto->GetAxis(5)->SetTitle("tan#lambda");
 157    fDeDxHisto->GetAxis(6)->SetTitle("ncls");
 158    fDeDxHisto->GetAxis(7)->SetTitle("p (GeV/c)");
 159    fDeDxHisto->Sumw2();
 160
 161    // Init cuts
 162    if(!fCutsMC)
 163      AliDebug(AliLog::kError, "ERROR: Cannot find AliMCInfoCuts object");
 164    if(!fCutsRC)
 165      AliDebug(AliLog::kError, "ERROR: Cannot find AliRecInfoCuts object");
 166
 167    // init folder
 168    fAnalysisFolder = CreateFolder("folderDEdx","Analysis de/dx Folder");
 169 }
 170
 171 //_____________________________________________________________________________
 172 void AliPerformanceDEdx::ProcessTPC(AliStack* const /*stack*/, AliESDtrack *const /*esdTrack*/)
 173 {
 174   // Fill dE/dx  comparison information
 175   AliDebug(AliLog::kWarning, "Warning: Not implemented");
 176 }
 177
 178 //_____________________________________________________________________________
 179 void AliPerformanceDEdx::ProcessInnerTPC(AliStack* const stack, AliESDtrack *const esdTrack)
 180 {
 181   if(!esdTrack) return;
 182
 183   const AliExternalTrackParam *innerParam =  esdTrack->GetInnerParam();
 184   if(!innerParam) return;
 185
 186   Float_t dca[2], cov[3]; // dca_xy, dca_z, sigma_xy, sigma_xy_z, sigma_z
 187   esdTrack->GetImpactParametersTPC(dca,cov);
 188
 189   if((esdTrack->GetStatus()&AliESDtrack::kTPCrefit)==0) return; // TPC refit
 190   if(TMath::Abs(dca[0])<fCutsRC->GetMaxDCAToVertexXY() && TMath::Abs(dca[1])<fCutsRC->GetMaxDCAToVertexZ())
 191   {
 192     Float_t dedx = esdTrack->GetTPCsignal();
 193     Int_t ncls = esdTrack->GetTPCNcls();
 194
 195     Double_t pt = innerParam->Pt();
 196     Double_t lam = TMath::ATan2(innerParam->Pz(),innerParam->Pt());
 197     Double_t p = pt/TMath::Cos(lam);
 198     //Double_t alpha = innerParam->GetAlpha();
 199     Double_t phi = TMath::ATan2(innerParam->Py(),innerParam->Px());
 200     //if(phi<0.) phi += 2.*TMath::Phi();
 201     Double_t y = innerParam->GetY();
 202     Double_t z = innerParam->GetZ();
 203     Double_t snp = innerParam->GetSnp();
 204     Double_t tgl = innerParam->GetTgl();
 205
 206     //Double_t vDeDxHisto[8] = {dedx,alpha,y,z,snp,tgl,ncls,p};
 207     Double_t vDeDxHisto[8] = {dedx,phi,y,z,snp,tgl,ncls,p};
 208     fDeDxHisto->Fill(vDeDxHisto);
 209   }
 210
 211   if(!stack) return;
 212 }
 213
 214 //_____________________________________________________________________________
 215 void AliPerformanceDEdx::ProcessTPCITS(AliStack* const /*stack*/, AliESDtrack *const /*esdTrack*/)
 216 {
 217   // Fill dE/dx  comparison information
 218
 219    AliDebug(AliLog::kWarning, "Warning: Not implemented");
 220 }
 221
 222 //_____________________________________________________________________________
 223 void AliPerformanceDEdx::ProcessConstrained(AliStack* const /*stack*/, AliESDtrack *const /*esdTrack*/)
 224 {
 225   // Fill dE/dx  comparison information
 226
 227    AliDebug(AliLog::kWarning, "Warning: Not implemented");
 228 }
 229
 230 //_____________________________________________________________________________
 231 Long64_t AliPerformanceDEdx::Merge(TCollection* const list)
 232 {
 233   // Merge list of objects (needed by PROOF)
 234
 235   if (!list)
 236   return 0;
 237
 238   if (list->IsEmpty())
 239   return 1;
 240
 241   TIterator* iter = list->MakeIterator();
 242   TObject* obj = 0;
 243
 244   // collection of generated histograms
 245   Int_t count=0;
 246   while((obj = iter->Next()) != 0)
 247   {
 248     AliPerformanceDEdx* entry = dynamic_cast<AliPerformanceDEdx*>(obj);
 249     if (entry == 0) continue;
 250
 251     fDeDxHisto->Add(entry->fDeDxHisto);
 252     count++;
 253   }
 254
 255 return count;
 256 }
 257
 258 //_____________________________________________________________________________
 259 void AliPerformanceDEdx::Exec(AliMCEvent* const mcEvent, AliESDEvent *const esdEvent, AliESDfriend *const esdFriend, const Bool_t bUseMC, const Bool_t bUseESDfriend)
 260 {
 261   // Process comparison information
 262   //
 263   if(!esdEvent)
 264   {
 265       AliDebug(AliLog::kError, "esdEvent not available");
 266       return;
 267   }
 268   AliHeader* header = 0;
 269   AliGenEventHeader* genHeader = 0;
 270   AliStack* stack = 0;
 271   TArrayF vtxMC(3);
 272
 273   if(bUseMC)
 274   {
 275     if(!mcEvent) {
 276       AliDebug(AliLog::kError, "mcEvent not available");
 277       return;
 278     }
 279
 280     // get MC event header
 281     header = mcEvent->Header();
 282     if (!header) {
 283       AliDebug(AliLog::kError, "Header not available");
 284       return;
 285     }
 286     // MC particle stack
 287     stack = mcEvent->Stack();
 288     if (!stack) {
 289       AliDebug(AliLog::kError, "Stack not available");
 290       return;
 291     }
 292
 293     // get MC vertex
 294     genHeader = header->GenEventHeader();
 295     if (!genHeader) {
 296       AliDebug(AliLog::kError, "Could not retrieve genHeader from Header");
 297       return;
 298     }
 299     genHeader->PrimaryVertex(vtxMC);
 300
 301   } // end bUseMC
 302
 303   // use ESD friends
 304   if(bUseESDfriend) {
 305     if(!esdFriend) {
 306       AliDebug(AliLog::kError, "esdFriend not available");
 307       return;
 308     }
 309   }
 310
 311
 312
 313
 314   //  Process events
 315   for (Int_t iTrack = 0; iTrack < esdEvent->GetNumberOfTracks(); iTrack++)
 316   {
 317     AliESDtrack *track = esdEvent->GetTrack(iTrack);
 318     if(!track) continue;
 319
 320     if(GetAnalysisMode() == 0) ProcessTPC(stack,track);
 321     else if(GetAnalysisMode() == 1) ProcessTPCITS(stack,track);
 322     else if(GetAnalysisMode() == 2) ProcessConstrained(stack,track);
 323     else if(GetAnalysisMode() == 3) ProcessInnerTPC(stack,track);
 324     else {
 325       printf("ERROR: AnalysisMode %d \n",fAnalysisMode);
 326       return;
 327     }
 328   }
 329 }
 330
 331 //_____________________________________________________________________________
 332 void AliPerformanceDEdx::Analyse()
 333 {
 334   // Analyze comparison information and store output histograms
 335   // in the folder "folderDEdx"
 336   //
 337   TH1::AddDirectory(kFALSE);
 338   TH1F *h1D=0;
 339   TH2F *h2D=0;
 340   TObjArray *aFolderObj = new TObjArray;
 341
 342   char name[256];
 343   char title[256];
 344
 345   for(Int_t i=1; i<8; i++) {
 346     //
 347     h2D = (TH2F*)fDeDxHisto->Projection(0,i);
 348
 349     sprintf(name,"h_dedx_%d_vs_%d",0,i);
 350     h2D->SetName(name);
 351     sprintf(title,"%s vs %s",fDeDxHisto->GetAxis(0)->GetTitle(),fDeDxHisto->GetAxis(i)->GetTitle());
 352     h2D->SetTitle(title);
 353     h2D->GetXaxis()->SetTitle(fDeDxHisto->GetAxis(i)->GetTitle());
 354     h2D->GetYaxis()->SetTitle(fDeDxHisto->GetAxis(0)->GetTitle());
 355
 356     if(i==7) h2D->SetBit(TH1::kLogX);
 357     aFolderObj->Add(h2D);
 358   }
 359
 360   // resolution histograms for mips
 361   fDeDxHisto->GetAxis(2)->SetRangeUser(-15.,14.999);
 362   fDeDxHisto->GetAxis(3)->SetRangeUser(-120.,119.999);
 363   fDeDxHisto->GetAxis(4)->SetRangeUser(-0.4, 0.399);
 364   fDeDxHisto->GetAxis(5)->SetRangeUser(-1.,0.999);
 365   fDeDxHisto->GetAxis(6)->SetRangeUser(60.,140.);
 366   fDeDxHisto->GetAxis(7)->SetRangeUser(0.4,0.499);
 367
 368   h1D=(TH1F*)fDeDxHisto->Projection(0);
 369   h1D->SetName("dedx_mips");
 370
 371   h1D->SetTitle("dedx_mips");
 372   h1D->GetXaxis()->SetTitle(fDeDxHisto->GetAxis(0)->GetTitle());
 373   aFolderObj->Add(h1D);
 374
 375   //
 376   TObjArray *arr[7] = {0};
 377   TF1 *f1[7] = {0};
 378
 379   for(Int_t i=1; i<8; i++)
 380   {
 381     arr[i] = new TObjArray;
 382     f1[i] = new TF1("gaus","gaus");
 383     //printf("i %d \n",i);
 384
 385     h2D = (TH2F*)fDeDxHisto->Projection(0,i);
 386
 387     f1[i]->SetRange(40,60); // should be pion peak
 388     h2D->FitSlicesY(f1[i],0,-1,10,"QNR",arr[i]); // gaus fit of pion peak
 389
 390     h1D = (TH1F*)arr[i]->At(1);
 391     sprintf(name,"mean_dedx_mips_vs_%d",i);
 392     h1D->SetName(name);
 393     sprintf(title,"%s vs %s","mean_dedx_mips (a.u.)",fDeDxHisto->GetAxis(i)->GetTitle());
 394     h1D->SetTitle(title);
 395     h1D->GetXaxis()->SetTitle(fDeDxHisto->GetAxis(i)->GetTitle());
 396     h1D->GetYaxis()->SetTitle("mean_dedx_mips (a.u.)");
 397     //h1D->SetMinimum(40);
 398     //h1D->SetMaximum(60);
 399
 400     aFolderObj->Add(h1D);
 401
 402     h1D = (TH1F*)arr[i]->At(2);
 403     sprintf(name,"res_dedx_mips_vs_%d",i);
 404     h1D->SetName(name);
 405     sprintf(title,"%s vs %s","res_dedx_mips (a.u)",fDeDxHisto->GetAxis(i)->GetTitle());
 406     h1D->SetTitle(title);
 407     h1D->GetXaxis()->SetTitle(fDeDxHisto->GetAxis(i)->GetTitle());
 408     h1D->GetYaxis()->SetTitle("res_dedx_mips (a.u.)");
 409     //h1D->SetMinimum(0);
 410     //h1D->SetMaximum(6);
 411
 412     aFolderObj->Add(h1D);
 413   }
 414
 415   // export objects to analysis folder
 416   fAnalysisFolder = ExportToFolder(aFolderObj);
 417
 418   // delete only TObjrArray
 419   if(aFolderObj) delete aFolderObj;
 420 }
 421
 422 //_____________________________________________________________________________
 423 TFolder* AliPerformanceDEdx::ExportToFolder(TObjArray * array)
 424 {
 425   // recreate folder avery time and export objects to new one
 426   //
 427   AliPerformanceDEdx * comp=this;
 428   TFolder *folder = comp->GetAnalysisFolder();
 429
 430   TString name, title;
 431   TFolder *newFolder = 0;
 432   Int_t i = 0;
 433   Int_t size = array->GetSize();
 434
 435   if(folder) {
 436      // get name and title from old folder
 437      name = folder->GetName();
 438      title = folder->GetTitle();
 439
 440          // delete old one
 441      delete folder;
 442
 443          // create new one
 444      newFolder = CreateFolder(name.Data(),title.Data());
 445      newFolder->SetOwner();
 446
 447          // add objects to folder
 448      while(i < size) {
 449            newFolder->Add(array->At(i));
 450            i++;
 451          }
 452   }
 453
 454 return newFolder;
 455 }
 456
 457
 458 //_____________________________________________________________________________
 459 TFolder* AliPerformanceDEdx::CreateFolder(TString name,TString title) {
 460 // create folder for analysed histograms
 461 TFolder *folder = 0;
 462   folder = new TFolder(name.Data(),title.Data());
 463
 464   return folder;
 465 }
 466