From: hristov <hristov@f7af4fe6-9843-0410-8265-dc069ae4e863>
Date: Wed, 24 Nov 2010 10:43:23 +0000 (+0000)
Subject: Add 2 functions to return the number of degrees of freedom and the normalized chi2... 
X-Git-Url: http://git.uio.no/git/?a=commitdiff_plain;h=e0ab39d21383b855e6f6b7aad02e855f19f989ce;p=u%2Fmrichter%2FAliRoot.git

Add 2 functions to return the number of degrees of freedom and the normalized chi2 of the track. (P.Pillot)
---

diff --git a/STEER/AliESDMuonTrack.cxx b/STEER/AliESDMuonTrack.cxx
index ad9db0989d5..d3d3861038c 100644
--- a/STEER/AliESDMuonTrack.cxx
+++ b/STEER/AliESDMuonTrack.cxx
@@ -517,6 +517,24 @@ void AliESDMuonTrack::LorentzPUncorrected(TLorentzVector& vP) const
   vP.SetPxPyPzE(pX, pY, pZ, e);
 }
 
+//_____________________________________________________________________________
+Int_t AliESDMuonTrack::GetNDF() const
+{
+  /// return the number of degrees of freedom
+  
+  Int_t ndf = 2 * static_cast<Int_t>(fNHit) - 5;
+  return (ndf > 0) ? ndf : 0;
+}
+
+//_____________________________________________________________________________
+Double_t AliESDMuonTrack::GetNormalizedChi2() const
+{
+  /// return the chi2 value divided by the number of degrees of freedom
+  
+  Int_t ndf = GetNDF();
+  return (ndf > 0) ? fChi2 / static_cast<Double_t>(ndf) : 0.;
+}
+
 //_____________________________________________________________________________
 Int_t AliESDMuonTrack::GetMatchTrigger() const
 {
diff --git a/STEER/AliESDMuonTrack.h b/STEER/AliESDMuonTrack.h
index a7a457806fa..18ed1b377ce 100644
--- a/STEER/AliESDMuonTrack.h
+++ b/STEER/AliESDMuonTrack.h
@@ -98,6 +98,8 @@ public:
   void     SetChi2(Double_t Chi2) {fChi2 = Chi2;}
   UChar_t  GetNHit(void) const {return fNHit;}
   void     SetNHit(UInt_t NHit) {fNHit = NHit;}
+  Int_t    GetNDF() const;
+  Double_t GetNormalizedChi2() const;
   
   // Get and Set methods for trigger matching
   Int_t    GetMatchTrigger() const;