@@ -20,7 +20,7 @@ void MomResComp(TTree* trks) {
2020 TH1F * gactive = new TH1F ("gactive" ,"Active hit fraction" ,100 ,0.0 ,1.0 );
2121 TH1F * gnull = new TH1F ("gnull" ,"Null hit fraction" ,100 ,0.0 ,1.0 );
2222 TH1F * gcell = new TH1F ("gcell" ,"hit/cell fraction" ,100 ,0.7 ,1.0 );
23- TH1F * gmomerr = new TH1F ("gmomerr" ,"KK fit momentum error" ,100 ,0.0 ,0.8 );
23+ TH1F * gmomerr = new TH1F ("gmomerr" ,"KK fit momentum error;Mom error (MeV/c) " ,100 ,0.0 ,0.8 );
2424 gprob -> SetLineColor (kBlue );
2525 gnactive -> SetLineColor (kBlue );
2626 gactive -> SetLineColor (kBlue );
@@ -40,7 +40,7 @@ void MomResComp(TTree* trks) {
4040 TH1F * bactive = new TH1F ("bactive" ,"Active hit fraction" ,100 ,0.0 ,1.0 );
4141 TH1F * bnull = new TH1F ("bnull" ,"Null hit fraction" ,100 ,0.0 ,1.0 );
4242 TH1F * bcell = new TH1F ("bcell" ,"hit/cell fraction" ,100 ,0.7 ,1.0 );
43- TH1F * bmomerr = new TH1F ("bmomerr" ,"KK fit momentum error" ,100 ,0.0 ,0.8 );
43+ TH1F * bmomerr = new TH1F ("bmomerr" ,"KK fit momentum error;Mom error (MeV/c) " ,100 ,0.0 ,0.8 );
4444 bprob -> SetLineColor (kRed );
4545 bnactive -> SetLineColor (kRed );
4646 bactive -> SetLineColor (kRed );
@@ -74,6 +74,10 @@ void MomResComp(TTree* trks) {
7474 bcell -> Scale (10.0 );
7575 bmomerr -> Scale (10.0 );
7676
77+ TLegend * leg = new TLegend (0.1 ,0.5 ,0.5 ,0.9 );
78+ leg -> AddEntry (gprob ,"Good Mom Resolution" ,"L" );
79+ leg -> AddEntry (bprob ,"Bad Mom Resolution (X10)" ,"L" );
80+
7781 TCanvas * mccan = new TCanvas ("mccan" ,"mccan" ,1000 ,600 );
7882 mccan -> Divide (3 ,2 );
7983 mccan -> cd (1 );
@@ -82,6 +86,7 @@ void MomResComp(TTree* trks) {
8286 mccan -> cd (2 );
8387 gactive -> Draw ();
8488 bactive -> Draw ("sameh" );
89+ leg -> Draw ();
8590 mccan -> cd (3 );
8691 gnull -> Draw ();
8792 bnull -> Draw ("sameh" );
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