/afs/cern.ch/work/a/aaltunda/public/www/CMSSW_6_2_7/src/DataFormats/Math/interface/invertPosDefMatrix.h File Reference

#include "Math/SMatrix.h"
#include "Math/CholeskyDecomp.h"

Go to the source code of this file.

Functions
template<typename T , unsigned int N>
bool	invertPosDefMatrix (ROOT::Math::SMatrix< T, N, N, ROOT::Math::MatRepSym< T, N > > &m)
template<typename T , unsigned int N>
bool	invertPosDefMatrix (ROOT::Math::SMatrix< T, N, N, ROOT::Math::MatRepSym< T, N > > const &mIn, ROOT::Math::SMatrix< T, N, N, ROOT::Math::MatRepSym< T, N > > &mOut)

---

Function Documentation

template<typename T , unsigned int N>

bool invertPosDefMatrix

(

ROOT::Math::SMatrix< T, N, N, ROOT::Math::MatRepSym< T, N > > &

m

)

[inline]

Definition at line 9 of file invertPosDefMatrix.h.

References ROOT::Math::CholeskyDecomp< F, N >::Invert(), and m.

Referenced by PerigeeTrajectoryError::calculateWeightMatrix(), KalmanVertexUpdator< N >::chi2Increment(), TrajectoryStateCombiner::combine(), KalmanVertexUpdator< N >::positionUpdate(), KalmanVertexTrackUpdator< 5 >::trackRefit(), KinematicConstrainedVertexUpdatorT< nTrk, nConstraint >::update(), and LocalTrajectoryError::weightMatrix().

                                                                                   {
  
  ROOT::Math::CholeskyDecomp<T,N> decomp(m);
  if (!decomp) {
    return m.Invert();
  } else 
    decomp.Invert(m);
  return true;

}

template<typename T , unsigned int N>

bool invertPosDefMatrix	(	ROOT::Math::SMatrix< T, N, N, ROOT::Math::MatRepSym< T, N > > const &	mIn,
		ROOT::Math::SMatrix< T, N, N, ROOT::Math::MatRepSym< T, N > > &	mOut
	)		[inline]

Definition at line 21 of file invertPosDefMatrix.h.

References ROOT::Math::CholeskyDecomp< F, N >::Invert().

                                                                               {
  
  ROOT::Math::CholeskyDecomp<T,N> decomp(mIn);
  if (!decomp) {
    mOut=mIn;
    return mOut.Invert();
  } else 
    decomp.Invert(mOut);
  return true;

}