TPC/AliTPCScanPID.C

   1 ///////////////////////////////////////////////////////////
   2 // Test macro for AliTPCtracksPid.root file            //
   3 // JINR Dubna Aug 2002                                   //
   4 ///////////////////////////////////////////////////////////
   5 void
   6 AliTPCScanPID(Int_t evNumber2=3) {
   7   //................. Prepare histogramms ................
   8      TH2F *qplot =  new TH2F("Qtrm","Qtrm vs Pmom",100,0,1300,100,0,13);
   9      TH2F *qplotP=  new TH2F("Qtrm1","Qtrm vs Pmom",100,0,1300,100,0,13);
  10      TH2F *qplotKa= new TH2F("Qtrm2","Qtrm vs Pmom",100,0,1300,100,0,13);
  11      TH2F *qplotPi= new TH2F("Qtrm3","Qtrm vs Pmom",100,0,1300,100,0,13);
  12      TH2F *qplotE=  new TH2F("Qtrm4","Qtrm vs Pmom",100,0,1300,100,0,13);
  13      qplotP.SetMarkerStyle(8); qplotP.SetMarkerColor(kBlack); qplotP.SetMarkerSize(.3);
  14      qplotKa.SetMarkerStyle(8); qplotKa.SetMarkerColor(kRed); qplotKa.SetMarkerSize(.3);
  15      qplotPi.SetMarkerStyle(8); qplotPi.SetMarkerColor(kBlue); qplotPi.SetMarkerSize(.3);
  16      qplotE.SetMarkerStyle(8); qplotE.SetMarkerColor(kGreen); qplotE.SetMarkerSize(.3);
  17   //......................................................
  18
  19 TFile *fpid = new TFile("AliTPCtracksPid.root","read");
  20 //
  21 //   Loop over events
  22 //
  23 for (int nev=0; nev< evNumber2; nev++) {
  24   char tpidname[30];
  25   sprintf(tpidname,"TreeT%d",nev);
  26   TTree *tracktree=(TTree*)fpid->Get(tpidname);
  27   TBranch *tbranch=tracktree->GetBranch("pids");
  28
  29    Int_t nentr=tbranch->GetEntries();
  30    cout<<"Found PID for "<<nentr<<"  TPC tracks on "<<tpidname<<endl;
  31
  32    AliTPCtrackPid *iopid=0;
  33 for(Int_t ii=0;ii<nentr;ii++)
  34   {
  35       AliTPCtrackPid *iopid=new AliTPCtrackPid;
  36       tbranch->SetAddress(&iopid);
  37       tracktree->GetEvent(ii);
  38
  39       Float_t xsignal=iopid->fSignal/50.;
  40
  41         if(iopid->fPcode ==2212)qplotP.Fill(1000*iopid->fMom,xsignal);
  42         if(iopid->fPcode == 321)qplotKa.Fill(1000*iopid->fMom,xsignal  );
  43         if(iopid->fPcode == 211)qplotPi.Fill(1000*iopid->fMom,xsignal  );
  44         if(iopid->fPcode ==  11)qplotE.Fill(1000*iopid->fMom,xsignal   );
  45
  46       //cout<<"PID pcode,fsignal,fmom= "
  47       //  <<iopid->fPcode<<","<<iopid->fSignal<<","<<iopid->fMom<<endl;
  48       delete iopid;
  49   }// Enf for ii (tracks)
  50  }// End for nev (events)
  51  fpid->Close();
  52   //...................... Draw histogramms .................
  53    TCanvas *c1 = new TCanvas("PID_test","Scan PID ",200,10,900,700);
  54    c1->Divide(1,1);
  55   //.........................................................
  56    c1->cd(1); gPad->SetFillColor(33);
  57    qplot->Draw();
  58    qplotP.Draw("same");qplotKa.Draw("same");qplotPi.Draw("same");qplotE.Draw("same");
  59    AliTPCPid *pid =new AliTPCPid(100);
  60     pid.fCutKa->SetLineColor(kRed);
  61     pid.fCutKa->Draw("same");
  62
  63   c1->Print("PIDplot.ps");
  64   cout<<"End of file AliTPCtracksPid.root "<<endl;
  65
  66   return;
  67 }
  68
  69