Handy object containing results of a diagonalization. More...

#include <MatrixDiag.hh>

Collaboration diagram for EigenSystem< N >:

Public Types
typedef pair< double, Vector< N > >	EigenPair
typedef vector< EigenPair >	EigenPairs
Public Member Functions
Vector< N >	getDiagVector () const
Matrix< N >	getDiagMatrix () const
EigenPairs	getEigenPairs () const
vector< double >	getEigenValues () const
vector< Vector< N > >	getEigenVectors () const
Private Attributes
EigenPairs	_eigenPairs
Friends
template<size_t M>
EigenSystem< M >	diagonalize (const Matrix< M > &)

Detailed Description

template<size_t N>
class Rivet::EigenSystem< N >

Handy object containing results of a diagonalization.

Definition at line 22 of file MatrixDiag.hh.

Member Typedef Documentation

typedef pair<double, Vector<N> > EigenPair

Definition at line 28 of file MatrixDiag.hh.

typedef vector<EigenPair> EigenPairs

Definition at line 29 of file MatrixDiag.hh.

Member Function Documentation

Matrix<N> getDiagMatrix ( ) const [inline]

Definition at line 40 of file MatrixDiag.hh.

References EigenSystem< N >::getDiagVector().

Referenced by FParameter::_calcFParameter(), and Sphericity::_calcSphericity().

                                  {
    return Matrix<N>::mkDiag(getDiagVector());
  }

Vector<N> getDiagVector ( ) const [inline]

Definition at line 31 of file MatrixDiag.hh.

References EigenSystem< N >::_eigenPairs, and Vector< N >::set().

Referenced by EigenSystem< N >::getDiagMatrix().

                                  {
    assert(_eigenPairs.size() == N);
    Vector<N> ret;
    for (size_t i = 0; i < N; ++i) {
      ret.set(i, _eigenPairs[i].first);
    }
    return ret;
  }

EigenPairs getEigenPairs ( ) const [inline]

Definition at line 44 of file MatrixDiag.hh.

References EigenSystem< N >::_eigenPairs.

Referenced by FParameter::_calcFParameter(), and Sphericity::_calcSphericity().

                                   {
    return _eigenPairs;
  }

vector<double> getEigenValues ( ) const [inline]

Definition at line 48 of file MatrixDiag.hh.

References EigenSystem< N >::_eigenPairs.

                                        {
    assert(_eigenPairs.size() == N);
    vector<double> ret;
    for (size_t i = 0; i < N; ++i) {
      ret.push_back(_eigenPairs[i].first);
    }
    return ret;
  }

vector<Vector<N> > getEigenVectors ( ) const [inline]

Definition at line 57 of file MatrixDiag.hh.

References EigenSystem< N >::_eigenPairs, and Rivet::second.

                                             {
    assert(_eigenPairs.size() == N);
    vector<Vector<N> > ret;
    for (size_t i = 0; i < N; ++i) {
      ret.push_back(_eigenPairs[i].second);
    }
    return ret;
  }