corrected the ndofs for the straight line fit

src/objects/Multiplet.cpp

@@ -34,7 +34,7 @@ ROOT::Math::XYPoint Multiplet::getKinkAt(const std::string&) const {
 void Multiplet::calculateChi2() {
 
     chi2_ = m_upstream->getChi2() + m_downstream->getChi2() + sqrt(m_offsetAtScatterer.Dot(m_offsetAtScatterer));
-    ndof_ = static_cast<double>(track_clusters_.size()) - 4.;
+    ndof_ = m_upstream->getNdof() + m_downstream->getNdof();
     chi2ndof_ = chi2_ / ndof_;
 }
 

src/objects/StraightLineTrack.cpp

@@ -36,8 +36,7 @@ ROOT::Math::XYPoint StraightLineTrack::getKinkAt(const std::string&) const {
 void StraightLineTrack::calculateChi2() {
 
     // Get the number of clusters
-
-    ndof_ = static_cast<double>(track_clusters_.size()) - 2.;
+    ndof_ = (static_cast<double>(track_clusters_.size()) - 2.) * 2.;
     chi2_ = 0.;
     chi2ndof_ = 0.;