ITS/AliITSComparisonV2.C

   1 /****************************************************************************
   2  *           Very important, delicate and rather obscure macro.             *
   3  *                                                                          *
   4  *               Creates list of "trackable" tracks,                        *
   5  *             calculates efficiency, resolutions etc.                      *
   6  *  The ESD tracks must be in an appropriate state (kITSin or kITSrefit)    *
   7  *                                                                          *
   8  *           Origin: I.Belikov, CERN, Jouri.Belikov@cern.ch                 *
   9  ****************************************************************************/
  10
  11 #if !defined(__CINT__) || defined(__MAKECINT__)
  12   #include <TMath.h>
  13   #include <TError.h>
  14   #include <Riostream.h>
  15   #include <TH1F.h>
  16   #include <TH2F.h>
  17   #include <TTree.h>
  18   #include <TParticle.h>
  19   #include <TCanvas.h>
  20   #include <TLine.h>
  21   #include <TText.h>
  22   #include <TBenchmark.h>
  23   #include <TStyle.h>
  24   #include <TFile.h>
  25   #include <TROOT.h>
  26
  27   #include "AliStack.h"
  28   #include "AliHeader.h"
  29   #include "AliTrackReference.h"
  30   #include "AliRunLoader.h"
  31   #include "AliRun.h"
  32   #include "AliESDEvent.h"
  33
  34   #include "AliITSRecPoint.h"
  35   #include "AliITSLoader.h"
  36 #endif
  37
  38 Int_t GoodTracksITS(const Char_t *dir=".");
  39
  40 extern AliRun *gAlice;
  41 extern TBenchmark *gBenchmark;
  42 extern TROOT *gROOT;
  43
  44 static Int_t allgood=0;
  45 static Int_t allselected=0;
  46 static Int_t allfound=0;
  47
  48 Int_t AliITSComparisonV2
  49 (Float_t ptcutl=0.2, Float_t ptcuth=10., const Char_t *dir=".") {
  50    gBenchmark->Start("AliITSComparisonV2");
  51
  52    ::Info("AliITSComparisonV2.C","Doing comparison...");
  53
  54
  55    TH1F *hp=(TH1F*)gROOT->FindObject("hp");
  56    if (!hp) hp=new TH1F("hp","PHI resolution",50,-20.,20.);
  57    hp->SetFillColor(4);
  58
  59    TH1F *hl=(TH1F*)gROOT->FindObject("hl");
  60    if (!hl) hl=new TH1F("hl","LAMBDA resolution",50,-20,20);
  61    hl->SetFillColor(4);
  62
  63    TH1F *hpt=(TH1F*)gROOT->FindObject("hpt");
  64    if (!hpt) hpt=new TH1F("hpt","Relative Pt resolution",30,-10.,10.);
  65    hpt->SetFillColor(2);
  66
  67    TH1F *hmpt=(TH1F*)gROOT->FindObject("hmpt");
  68    if (!hmpt)
  69       hmpt=new TH1F("hmpt","Transverse impact parameter",30,-777,777);
  70    hmpt->SetFillColor(6);
  71
  72    TH1F *hz=(TH1F*)gROOT->FindObject("hz");
  73    if (!hz) hz=new TH1F("hz","Longitudinal impact parameter",30,-777,777);
  74
  75
  76
  77    TH1F *hgood=(TH1F*)gROOT->FindObject("hgood");
  78    if (!hgood) hgood=new TH1F("hgood","Good tracks",30,0.2,6.1);
  79
  80    TH1F *hfound=(TH1F*)gROOT->FindObject("hfound");
  81    if (!hfound) hfound=new TH1F("hfound","Found tracks",30,0.2,6.1);
  82
  83    TH1F *hfake=(TH1F*)gROOT->FindObject("hfake");
  84    if (!hfake) hfake=new TH1F("hfake","Fake tracks",30,0.2,6.1);
  85
  86    TH1F *hg=(TH1F*)gROOT->FindObject("hg");
  87    if (!hg) hg=new TH1F("hg","Efficiency for good tracks",30,0.2,6.1);
  88    hg->SetLineColor(4); hg->SetLineWidth(2);
  89
  90    TH1F *hf=(TH1F*)gROOT->FindObject("hf");
  91    if (!hf) hf=new TH1F("hf","Efficiency for fake tracks",30,0.2,6.1);
  92    hf->SetFillColor(1); hf->SetFillStyle(3013); hf->SetLineWidth(2);
  93
  94    TH1F *he=(TH1F*)gROOT->FindObject("he");
  95    if (!he)
  96       he =new TH1F("he","dE/dX for pions with 0.4<p<0.5 GeV/c",50,0.,200.);
  97
  98    TH2F *hep=(TH2F*)gROOT->FindObject("hep");
  99    if (!hep) hep=new TH2F("hep","dE/dX vs momentum",50,0.,2.,50,0.,400.);
 100    hep->SetMarkerStyle(8);
 101    hep->SetMarkerSize(0.4);
 102
 103
 104    Char_t fname[100];
 105    sprintf(fname,"%s/GoodTracksITS.root",dir);
 106
 107    TFile *refFile=TFile::Open(fname,"old");
 108    if (!refFile || !refFile->IsOpen()) {
 109    ::Info("AliITSComparisonV2.C","Marking good tracks (will take a while)...");
 110      if (GoodTracksITS(dir)) {
 111         ::Error("AliITSComparisonV2.C","Can't generate the reference file !");
 112         return 1;
 113      }
 114    }
 115    refFile=TFile::Open(fname,"old");
 116    if (!refFile || !refFile->IsOpen()) {
 117      ::Error("AliITSComparisonV2.C","Can't open the reference file !");
 118      return 1;
 119    }
 120
 121    TTree *itsTree=(TTree*)refFile->Get("itsTree");
 122    if (!itsTree) {
 123      ::Error("AliITSComparisonV2.C","Can't get the reference tree !");
 124      return 2;
 125    }
 126    TBranch *branch=itsTree->GetBranch("ITS");
 127    if (!branch) {
 128      ::Error("AliITSComparisonV2.C","Can't get the ITS branch !");
 129      return 3;
 130    }
 131    TClonesArray dummy("AliTrackReference",1000), *refs=&dummy;
 132    branch->SetAddress(&refs);
 133
 134
 135    sprintf(fname,"%s/AliESDs.root",dir);
 136    TFile *ef=TFile::Open(fname);
 137    if ((!ef)||(!ef->IsOpen())) {
 138       sprintf(fname,"%s/AliESDits.root",dir);
 139       ef=TFile::Open(fname);
 140       if ((!ef)||(!ef->IsOpen())) {
 141          ::Error("AliITSComparisonV2.C","Can't open AliESDits.root !");
 142          return 4;
 143       }
 144    }
 145    AliESDEvent* event = new AliESDEvent();
 146    TTree* esdTree = (TTree*) ef->Get("esdTree");
 147    if (!esdTree) {
 148       ::Error("AliITSComparison.C", "no ESD tree found");
 149       return 6;
 150    }
 151    event->ReadFromTree(esdTree);
 152
 153
 154    //******* Loop over events *********
 155    Int_t e=0;
 156    while (esdTree->GetEvent(e)) {
 157      cout<<endl<<endl<<"********* Processing event number: "<<e<<"*******\n";
 158
 159      Int_t nentr=event->GetNumberOfTracks();
 160      allfound+=nentr;
 161
 162      if (itsTree->GetEvent(e++)==0) {
 163         cerr<<"No reconstructable tracks !\n";
 164         continue;
 165      }
 166
 167      Int_t ngood=refs->GetEntriesFast();
 168      allgood+=ngood;
 169
 170      const Int_t MAX=15000;
 171      Int_t notf[MAX], nnotf=0;
 172      Int_t fake[MAX], nfake=0;
 173      Int_t mult[MAX], numb[MAX], nmult=0;
 174      Int_t k;
 175      for (k=0; k<ngood; k++) {
 176         AliTrackReference *ref=(AliTrackReference*)refs->UncheckedAt(k);
 177         Int_t lab=ref->Label(), tlab=-1;
 178         Float_t ptg=TMath::Sqrt(ref->Px()*ref->Px() + ref->Py()*ref->Py());
 179
 180         if (ptg<ptcutl) continue;
 181         if (ptg>ptcuth) continue;
 182
 183         allselected++;
 184
 185         hgood->Fill(ptg);
 186
 187         AliESDtrack *esd=0;
 188         Int_t cnt=0;
 189         for (Int_t i=0; i<nentr; i++) {
 190            AliESDtrack *t=event->GetTrack(i);
 191            UInt_t status=t->GetStatus();
 192
 193            if ((status&AliESDtrack::kITSrefit)==0) continue;
 194
 195            Int_t lbl=t->GetLabel();
 196            if (lab==TMath::Abs(lbl)) {
 197               if (cnt==0) {esd=t; tlab=lbl;}
 198               cnt++;
 199            }
 200         }
 201         if (cnt==0) {
 202            notf[nnotf++]=lab;
 203            continue;
 204         } else if (cnt>1){
 205            mult[nmult]=lab;
 206            numb[nmult]=cnt; nmult++;
 207         }
 208
 209         if (lab==tlab) hfound->Fill(ptg);
 210         else {
 211           fake[nfake++]=lab;
 212           hfake->Fill(ptg);
 213         }
 214
 215         Double_t alpha=esd->GetAlpha(),xv,par[5];
 216         esd->GetExternalParameters(xv,par);
 217         Float_t phi=TMath::ASin(par[2]) + alpha;
 218         if (phi<-TMath::Pi()) phi+=2*TMath::Pi();
 219         if (phi>=TMath::Pi()) phi-=2*TMath::Pi();
 220         Float_t lam=TMath::ATan(par[3]);
 221         Float_t pt_1=TMath::Abs(par[4]);
 222
 223         Float_t phig=TMath::ATan2(ref->Py(),ref->Px());
 224         hp->Fill((phi - phig)*1000.);
 225
 226         Float_t lamg=TMath::ATan2(ref->Pz(),ptg);
 227         hl->Fill((lam - lamg)*1000.);
 228
 229         Float_t d,z; esd->GetImpactParameters(d,z);
 230         hmpt->Fill(10000*d);
 231         hz->Fill(10000*z);
 232
 233         hpt->Fill((pt_1 - 1/ptg)/(1/ptg)*100.);
 234
 235         Float_t mom=1./(pt_1*TMath::Cos(lam));
 236         Float_t dedx=esd->GetITSsignal();
 237         hep->Fill(mom,dedx,1.);
 238
 239         Int_t pdg=(Int_t)ref->GetLength();  //this is particle's PDG !
 240
 241         if (TMath::Abs(pdg)==211) //pions
 242            if (mom>0.4 && mom<0.5) he->Fill(dedx,1.);
 243
 244      }
 245
 246      cout<<"\nList of Not found tracks :\n";
 247      for (k=0; k<nnotf; k++){
 248        cout<<notf[k]<<"\t";
 249        if ((k%9)==8) cout<<"\n";
 250      }
 251      cout<<"\n\nList of fake  tracks :\n";
 252      for (k=0; k<nfake; k++){
 253        cout<<fake[k]<<"\t";
 254        if ((k%9)==8) cout<<"\n";
 255      }
 256      cout<<"\n\nList of multiple found tracks :\n";
 257      for (k=0; k<nmult; k++) {
 258          cout<<"id.   "<<mult[k]
 259              <<"     found - "<<numb[k]<<"times\n";
 260      }
 261      cout<<endl;
 262
 263      cout<<"Number of found tracks : "<<nentr<<endl;
 264      cout<<"Number of \"good\" tracks : "<<ngood<<endl;
 265
 266      refs->Clear();
 267    } //***** End of the loop over events
 268
 269    delete event;
 270    delete esdTree;
 271    ef->Close();
 272
 273    delete itsTree;
 274    refFile->Close();
 275
 276    Stat_t ng=hgood->GetEntries(), nf=hfound->GetEntries();
 277    if (ng!=0) cout<<"\n\nIntegral efficiency is about "<<nf/ng*100.<<" %\n";
 278    cout<<"Total number selected of \"good\" tracks ="<<allselected<<endl<<endl;
 279    cout<<"Total number of found tracks ="<<allfound<<endl;
 280    cout<<"Total number of \"good\" tracks ="<<allgood<<endl;
 281    cout<<endl;
 282
 283    gStyle->SetOptStat(111110);
 284    gStyle->SetOptFit(1);
 285
 286    TCanvas *c1=new TCanvas("c1","",0,0,700,850);
 287
 288    Int_t minc=33;
 289
 290    TPad *p1=new TPad("p1","",0,0.3,.5,.6); p1->Draw();
 291    p1->cd(); p1->SetFillColor(42); p1->SetFrameFillColor(10);
 292    hp->SetFillColor(4);  hp->SetXTitle("(mrad)");
 293    if (hp->GetEntries()<minc) hp->Draw(); else hp->Fit("gaus"); c1->cd();
 294
 295    TPad *p2=new TPad("p2","",0.5,.3,1,.6); p2->Draw();
 296    p2->cd(); p2->SetFillColor(42); p2->SetFrameFillColor(10);
 297    hl->SetXTitle("(mrad)");
 298    if (hl->GetEntries()<minc) hl->Draw(); else hl->Fit("gaus"); c1->cd();
 299
 300    TPad *p3=new TPad("p3","",0,0,0.5,0.3); p3->Draw();
 301    p3->cd(); p3->SetFillColor(42); p3->SetFrameFillColor(10);
 302    hpt->SetXTitle("(%)");
 303    if (hpt->GetEntries()<minc) hpt->Draw(); else hpt->Fit("gaus"); c1->cd();
 304
 305    TPad *p4=new TPad("p4","",0.5,0,1,0.3); p4->Draw();
 306    p4->cd(); p4->SetFillColor(42); p4->SetFrameFillColor(10);
 307    hmpt->SetXTitle("(micron)");
 308    if (hmpt->GetEntries()<minc) hmpt->Draw(); else hmpt->Fit("gaus");
 309    hz->Draw("same"); c1->cd();
 310
 311
 312    TPad *p5=new TPad("p5","",0,0.6,1,1); p5->Draw(); p5->cd();
 313    p5->SetFillColor(41); p5->SetFrameFillColor(10);
 314    hfound->Sumw2(); hgood->Sumw2(); hfake->Sumw2();
 315    hg->Divide(hfound,hgood,1,1.,"b");
 316    hf->Divide(hfake,hgood,1,1.,"b");
 317    hg->SetMaximum(1.4);
 318    hg->SetYTitle("Tracking efficiency");
 319    hg->SetXTitle("Pt (GeV/c)");
 320    hg->Draw();
 321
 322    TLine *line1 = new TLine(0.2,1.0,6.1,1.0); line1->SetLineStyle(4);
 323    line1->Draw("same");
 324    TLine *line2 = new TLine(0.2,0.9,6.1,0.9); line2->SetLineStyle(4);
 325    line2->Draw("same");
 326
 327    hf->SetFillColor(1);
 328    hf->SetFillStyle(3013);
 329    hf->SetLineColor(2);
 330    hf->SetLineWidth(2);
 331    hf->Draw("histsame");
 332    TText *text = new TText(0.461176,0.248448,"Fake tracks");
 333    text->SetTextSize(0.05);
 334    text->Draw();
 335    text = new TText(0.453919,1.11408,"Good tracks");
 336    text->SetTextSize(0.05);
 337    text->Draw();
 338
 339    TCanvas *c2=new TCanvas("c2","",320,32,530,590);
 340    TPad *p6=new TPad("p6","",0.,0.,1.,.5); p6->Draw();
 341    p6->cd(); p6->SetFillColor(42); p6->SetFrameFillColor(10);
 342    he->SetFillColor(2); he->SetFillStyle(3005);
 343    he->SetXTitle("Arbitrary Units");
 344    if (he->GetEntries()<minc) he->Draw(); else he->Fit("gaus"); c2->cd();
 345
 346    TPad *p7=new TPad("p7","",0.,0.5,1.,1.); p7->Draw();
 347    p7->cd(); p7->SetFillColor(42); p7->SetFrameFillColor(10);
 348    hep->SetXTitle("p (Gev/c)"); hep->SetYTitle("dE/dX (Arb. Units)");
 349    hep->Draw(); c1->cd();
 350
 351    TFile fc("AliITSComparisonV2.root","RECREATE");
 352    c1->Write();
 353    c2->Write();
 354    fc.Close();
 355
 356    gBenchmark->Stop("AliITSComparisonV2");
 357    gBenchmark->Show("AliITSComparisonV2");
 358
 359    return 0;
 360 }
 361
 362
 363
 364 Int_t GoodTracksITS(const Char_t *dir) {
 365    if (gAlice) {
 366        delete gAlice->GetRunLoader();
 367        delete gAlice;//if everything was OK here it is already NULL
 368        gAlice = 0x0;
 369    }
 370
 371    Char_t fname[100];
 372    sprintf(fname,"%s/galice.root",dir);
 373
 374    AliRunLoader *rl = AliRunLoader::Open(fname,"COMPARISON");
 375    if (!rl) {
 376       ::Error("GoodTracksITS","Can't start session !");
 377       return 1;
 378    }
 379
 380    rl->LoadgAlice();
 381    rl->LoadHeader();
 382    rl->LoadKinematics();
 383
 384    AliITSLoader* itsl = (AliITSLoader*)rl->GetLoader("ITSLoader");
 385    if (itsl == 0x0) {
 386        ::Error("GoodTracksITS","Can not find the ITSLoader");
 387        delete rl;
 388        return 4;
 389    }
 390    itsl->LoadRecPoints();
 391
 392
 393    Int_t nev=rl->GetNumberOfEvents();
 394    ::Info("GoodTracksITS","Number of events : %d\n",nev);
 395
 396    sprintf(fname,"%s/GoodTracksTPC.root",dir);
 397    TFile *tpcFile=TFile::Open(fname);
 398    if ((!tpcFile)||(!tpcFile->IsOpen())) {
 399        ::Error("GoodTracksITS","Can't open the GoodTracksTPC.root !");
 400        delete rl;
 401        return 5;
 402    }
 403    TClonesArray dum("AliTrackReference",1000), *tpcRefs=&dum;
 404    TTree *tpcTree=(TTree*)tpcFile->Get("tpcTree");
 405    if (!tpcTree) {
 406        ::Error("GoodTracksITS","Can't get the TPC reference tree !");
 407        delete rl;
 408        return 6;
 409    }
 410    TBranch *tpcBranch=tpcTree->GetBranch("TPC");
 411    if (!tpcBranch) {
 412       ::Error("GoodTracksITS","Can't get the TPC reference branch !");
 413       delete rl;
 414       return 7;
 415    }
 416    tpcBranch->SetAddress(&tpcRefs);
 417
 418    sprintf(fname,"%s/GoodTracksITS.root",dir);
 419    TFile *itsFile=TFile::Open(fname,"recreate");
 420    TClonesArray dummy2("AliTrackReference",1000), *itsRefs=&dummy2;
 421    TTree itsTree("itsTree","Tree with info about the reconstructable ITS tracks");
 422    itsTree.Branch("ITS",&itsRefs);
 423
 424    //********  Loop over generated events
 425    for (Int_t e=0; e<nev; e++) {
 426      Int_t k;
 427
 428      rl->GetEvent(e);  itsFile->cd();
 429
 430      Int_t np = rl->GetHeader()->GetNtrack();
 431      cout<<"Event "<<e<<" Number of particles: "<<np<<endl;
 432
 433      //******** Fill the "good" masks
 434      Int_t *good=new Int_t[np]; for (k=0; k<np; k++) good[k]=0;
 435
 436      TTree *cTree=itsl->TreeR();
 437      if (!cTree) {
 438         ::Error("GoodTracksITS","Can't get the cluster tree !");
 439         delete rl;
 440         return 8;
 441      }
 442      TBranch *branch=cTree->GetBranch("ITSRecPoints");
 443      if (!branch) {
 444         ::Error("GoodTracksITS","Can't get the clusters branch !");
 445         delete rl;
 446         return 9;
 447      }
 448      TClonesArray dummy("AliITSRecPoint",10000), *clusters=&dummy;
 449      branch->SetAddress(&clusters);
 450
 451      Int_t entr=(Int_t)cTree->GetEntries();
 452      for (k=0; k<entr; k++) {
 453          cTree->GetEvent(k);
 454          Int_t ncl=clusters->GetEntriesFast(); if (ncl==0) continue;
 455          while (ncl--) {
 456             AliITSRecPoint *pnt=(AliITSRecPoint*)clusters->UncheckedAt(ncl);
 457
 458             Int_t lay=pnt->GetLayer();
 459             if (lay<0 || lay>5) {
 460                ::Error("GoodTracksITS","Wrong layer !");
 461                delete rl;
 462                return 10;
 463             }
 464
 465             Int_t l0=pnt->GetLabel(0);
 466                if (l0>=np) {
 467 //               cerr<<"Wrong label: "<<l0<<endl;
 468                  continue;
 469                }
 470             Int_t l1=pnt->GetLabel(1);
 471                if (l1>=np) {
 472 //               cerr<<"Wrong label: "<<l1<<endl;
 473                  continue;
 474                }
 475             Int_t l2=pnt->GetLabel(2);
 476                if (l2>=np) {
 477 //               cerr<<"Wrong label: "<<l2<<endl;
 478                  continue;
 479                }
 480             Int_t mask=1<<lay;
 481             if (l0>=0) good[l0]|=mask;
 482             if (l1>=0) good[l1]|=mask;
 483             if (l2>=0) good[l2]|=mask;
 484          }
 485          clusters->Clear();
 486      }
 487
 488
 489      //****** select tracks which are "good" enough
 490      AliStack* stack = rl->Stack();
 491
 492      tpcTree->GetEvent(e);
 493      Int_t nk=tpcRefs->GetEntriesFast();
 494      Int_t nt=0;
 495      for (k=0; k<nk; k++) {
 496         AliTrackReference *tpcRef=(AliTrackReference *)tpcRefs->UncheckedAt(k);
 497         Int_t lab=tpcRef->Label();
 498         if (good[lab] != 0x3F) continue;
 499         TParticle *p = (TParticle*)stack->Particle(lab);
 500         if (p == 0x0) {
 501            cerr<<"Can not get particle "<<lab<<endl;
 502            continue;
 503         }
 504
 505         AliTrackReference *ref=new((*itsRefs)[nt]) AliTrackReference(*tpcRef);
 506         ref->SetMomentum(p->Px(),p->Py(),p->Pz());
 507         ref->SetPosition(p->Vx(),p->Vy(),p->Vz());
 508         nt++;
 509      }
 510      tpcRefs->Clear();
 511
 512      itsTree.Fill();
 513      itsRefs->Clear();
 514
 515      delete[] good;
 516
 517    } //*** end of the loop over generated events
 518
 519    itsTree.Write();
 520    itsFile->Close();
 521
 522    delete tpcTree;
 523    tpcFile->Close();
 524
 525    delete rl;
 526    return 0;
 527 }
 528
 529