{
  // Macro for creating L3 diagnostic plots from running d0trigsim
  // daniel whiteson, danielw@fnal.gov
  // 08/01/02

  // Load the file and open the tree
  TFile *f = new TFile("L1L2L3global.root");
  TTree *Global = (TTree*)f.Get("Global");

  // define my histograms
  TH1F *l3_phi = new TH1F("l3_phi","L3 Track phi",64,0.0,6.3);
  TH1F *l3_ptinv = new TH1F("l3_ptinv","L3 Track q/pt",64,-2.0,2.0);
  TH2F *l3_dcaphi = new TH2F("l3_dcaphi","L3 Track phi vs dca (cm)",50,0.0,6.3,50,-0.5,0.5);
  TH1F *l3_nhits = new TH1F("l3_nhits","L3 N hits",9,8,16);


  // fill the histograms
  Global->Draw("L3GTR_GlobalTracker_on.L3GTR_GlobalTracker_onphi>>l3_phi");
  Global->Draw("L3GTR_GlobalTracker_on.L3GTR_GlobalTracker_ondca:L3GTR_GlobalTracker_onphi>>l3_dcaphi");
  Global->Draw("L3GTR_GlobalTracker_on.L3GTR_GlobalTracker_onnhits>>l3_nhits");
  Global->Draw("L3GTR_GlobalTracker_on.L3GTR_GlobalTracker_onptinv>>l3_ptinv");

  // make them pretty
  l3_phi->SetFillStyle(1001);
  l3_phi->SetFillColor(33);

  l3_nhits->SetFillStyle(1001);
  l3_nhits->SetFillColor(27);

  l3_ptinv->SetFillStyle(1001);
  l3_ptinv->SetFillColor(46);

  // draw them
  TCanvas *crun = new TCanvas("crun","crun");
  crun.Divide(2,2);

  crun.cd(1);
  l3_phi->Draw();

  crun.cd(2);
  l3_dcaphi->Draw();

  crun.cd(3);
  l3_ptinv->Draw();

  crun.cd(4);
  l3_nhits->Draw();
  
}