TPC/AliTPCScanPID.C

   1 /// \file AliTPCScanPID.C
   2 /// \brief Test macro for AliTPCtracksPid.root file
   3 ///
   4 /// \author JINR Dubna Aug 2002
   5
   6 void
   7 AliTPCScanPID(Int_t evNumber2=3) {
   8   //................. Prepare histogramms ................
   9      TH2F *qplot =  new TH2F("Qtrm","Qtrm vs Pmom",100,0,1300,100,0,13);
  10      TH2F *qplotP=  new TH2F("Qtrm1","Qtrm vs Pmom",100,0,1300,100,0,13);
  11      TH2F *qplotKa= new TH2F("Qtrm2","Qtrm vs Pmom",100,0,1300,100,0,13);
  12      TH2F *qplotPi= new TH2F("Qtrm3","Qtrm vs Pmom",100,0,1300,100,0,13);
  13      TH2F *qplotE=  new TH2F("Qtrm4","Qtrm vs Pmom",100,0,1300,100,0,13);
  14      qplotP.SetMarkerStyle(8); qplotP.SetMarkerColor(kBlack); qplotP.SetMarkerSize(.3);
  15      qplotKa.SetMarkerStyle(8); qplotKa.SetMarkerColor(kRed); qplotKa.SetMarkerSize(.3);
  16      qplotPi.SetMarkerStyle(8); qplotPi.SetMarkerColor(kBlue); qplotPi.SetMarkerSize(.3);
  17      qplotE.SetMarkerStyle(8); qplotE.SetMarkerColor(kGreen); qplotE.SetMarkerSize(.3);
  18   //......................................................
  19
  20 TFile *fpid = new TFile("AliTPCtracksPid.root","read");
  21 //
  22 //   Loop over events
  23 //
  24 for (int nev=0; nev< evNumber2; nev++) {
  25   char tpidname[30];
  26   sprintf(tpidname,"TreeT%d",nev);
  27   TTree *tracktree=(TTree*)fpid->Get(tpidname);
  28   TBranch *tbranch=tracktree->GetBranch("pids");
  29
  30    Int_t nentr=tbranch->GetEntries();
  31    cout<<"Found PID for "<<nentr<<"  TPC tracks on "<<tpidname<<endl;
  32
  33    AliTPCtrackPid *iopid=0;
  34 for(Int_t ii=0;ii<nentr;ii++)
  35   {
  36       AliTPCtrackPid *iopid=new AliTPCtrackPid;
  37       tbranch->SetAddress(&iopid);
  38       tracktree->GetEvent(ii);
  39
  40       Float_t xsignal=iopid->fSignal/50.;
  41
  42         if(iopid->fPcode ==2212)qplotP.Fill(1000*iopid->fMom,xsignal);
  43         if(iopid->fPcode == 321)qplotKa.Fill(1000*iopid->fMom,xsignal  );
  44         if(iopid->fPcode == 211)qplotPi.Fill(1000*iopid->fMom,xsignal  );
  45         if(iopid->fPcode ==  11)qplotE.Fill(1000*iopid->fMom,xsignal   );
  46
  47       //cout<<"PID pcode,fsignal,fmom= "
  48       //  <<iopid->fPcode<<","<<iopid->fSignal<<","<<iopid->fMom<<endl;
  49       delete iopid;
  50   }// Enf for ii (tracks)
  51  }// End for nev (events)
  52  fpid->Close();
  53   //...................... Draw histogramms .................
  54    TCanvas *c1 = new TCanvas("PID_test","Scan PID ",200,10,900,700);
  55    c1->Divide(1,1);
  56   //.........................................................
  57    c1->cd(1); gPad->SetFillColor(33);
  58    qplot->Draw();
  59    qplotP.Draw("same");qplotKa.Draw("same");qplotPi.Draw("same");qplotE.Draw("same");
  60    AliTPCPid *pid =new AliTPCPid(100);
  61     pid.fCutKa->SetLineColor(kRed);
  62     pid.fCutKa->Draw("same");
  63
  64   c1->Print("PIDplot.ps");
  65   cout<<"End of file AliTPCtracksPid.root "<<endl;
  66
  67   return;
  68 }
  69
  70