Eigen::internal::companion< _Scalar, _Deg > Class Template Reference

#include <Companion.h>

Public Types
enum	{ Deg = _Deg, Deg_1 =decrement_if_fixed_size<Deg>::ret }
typedef Matrix< Scalar, Deg_1, Deg_1 >	BottomLeftBlock
typedef Matrix< Scalar, Deg_1, 1 >	BottomLeftDiagonal
typedef Matrix< Scalar, Deg, Deg >	DenseCompanionMatrixType
typedef DenseIndex	Index
typedef Matrix< Scalar, _Deg, Deg_1 >	LeftBlock
typedef Matrix< Scalar, 1, Deg_1 >	LeftBlockFirstRow
typedef NumTraits< Scalar >::Real	RealScalar
typedef Matrix< Scalar, Deg, 1 >	RightColumn
typedef _Scalar	Scalar

Public Member Functions
void	balance ()
template<typename VectorType >
	companion (const VectorType &poly)
DenseCompanionMatrixType	denseMatrix () const
EIGEN_STRONG_INLINE const _Scalar	operator() (Index row, Index col) const
template<typename VectorType >
void	setPolynomial (const VectorType &poly)

Protected Member Functions
bool	balanced (RealScalar colNorm, RealScalar rowNorm, bool &isBalanced, RealScalar &colB, RealScalar &rowB)
bool	balancedR (RealScalar colNorm, RealScalar rowNorm, bool &isBalanced, RealScalar &colB, RealScalar &rowB)

Protected Attributes
BottomLeftDiagonal	m_bl_diag
RightColumn	m_monic

Detailed Description

template<typename _Scalar, int _Deg>
class Eigen::internal::companion< _Scalar, _Deg >

Definition at line 33 of file Companion.h.

Member Typedef Documentation

BottomLeftBlock

template<typename _Scalar, int _Deg>

typedef Matrix< Scalar, Deg_1, Deg_1 > Eigen::internal::companion< _Scalar, _Deg >::BottomLeftBlock

Definition at line 51 of file Companion.h.

BottomLeftDiagonal

template<typename _Scalar, int _Deg>

typedef Matrix<Scalar, Deg_1, 1> Eigen::internal::companion< _Scalar, _Deg >::BottomLeftDiagonal

Definition at line 47 of file Companion.h.

DenseCompanionMatrixType

template<typename _Scalar, int _Deg>

typedef Matrix<Scalar, Deg, Deg> Eigen::internal::companion< _Scalar, _Deg >::DenseCompanionMatrixType

Definition at line 49 of file Companion.h.

Index

template<typename _Scalar, int _Deg>

typedef DenseIndex Eigen::internal::companion< _Scalar, _Deg >::Index

Definition at line 54 of file Companion.h.

LeftBlock

template<typename _Scalar, int _Deg>

typedef Matrix< Scalar, _Deg, Deg_1 > Eigen::internal::companion< _Scalar, _Deg >::LeftBlock

Definition at line 50 of file Companion.h.

LeftBlockFirstRow

template<typename _Scalar, int _Deg>

typedef Matrix< Scalar, 1, Deg_1 > Eigen::internal::companion< _Scalar, _Deg >::LeftBlockFirstRow

Definition at line 52 of file Companion.h.

RealScalar

template<typename _Scalar, int _Deg>

typedef NumTraits<Scalar>::Real Eigen::internal::companion< _Scalar, _Deg >::RealScalar

Definition at line 44 of file Companion.h.

RightColumn

template<typename _Scalar, int _Deg>

typedef Matrix<Scalar, Deg, 1> Eigen::internal::companion< _Scalar, _Deg >::RightColumn

Definition at line 45 of file Companion.h.

Scalar

template<typename _Scalar, int _Deg>

typedef _Scalar Eigen::internal::companion< _Scalar, _Deg >::Scalar

Definition at line 43 of file Companion.h.

Member Enumeration Documentation

anonymous enum

template<typename _Scalar, int _Deg>

anonymous enum

Enumerator
Deg
Deg_1

Definition at line 38 of file Companion.h.

Constructor & Destructor Documentation

companion()

template<typename _Scalar, int _Deg>

template<typename VectorType >

Eigen::internal::companion< _Scalar, _Deg >::companion ( const VectorType &  poly )

inline

Definition at line 77 of file Companion.h.

Member Function Documentation

balance()

template<typename _Scalar , int _Deg>

void Eigen::internal::companion< _Scalar, _Deg >::balance

(

)

Balancing algorithm from B. N. PARLETT and C. REINSCH (1969) "Balancing a matrix for calculation of eigenvalues and eigenvectors" adapted to the case of companion matrices. A matrix with non zero row and non zero column is balanced for a certain norm if the i-th row and the i-th column have same norm for all i.

Definition at line 215 of file Companion.h.

balanced()

template<typename _Scalar , int _Deg>

bool Eigen::internal::companion< _Scalar, _Deg >::balanced ( RealScalar  colNorm, RealScalar  rowNorm, bool &  isBalanced, RealScalar &  colB, RealScalar &  rowB  )

inlineprotected

Helper function for the balancing algorithm.

Returns

true if the row and the column, having colNorm and rowNorm as norms, are balanced, false otherwise. colB and rowB are respectively the multipliers for the column and the row in order to balance them.

Definition at line 135 of file Companion.h.

balancedR()

template<typename _Scalar , int _Deg>

bool Eigen::internal::companion< _Scalar, _Deg >::balancedR ( RealScalar  colNorm, RealScalar  rowNorm, bool &  isBalanced, RealScalar &  colB, RealScalar &  rowB  )

inlineprotected

Helper function for the balancing algorithm.

Returns

true if the row and the column, having colNorm and rowNorm as norms, are balanced, false otherwise. colB and rowB are respectively the multipliers for the column and the row in order to balance them.

Set the norm of the column and the row to the geometric mean of the row and column norm

Definition at line 189 of file Companion.h.

denseMatrix()

template<typename _Scalar, int _Deg>

DenseCompanionMatrixType Eigen::internal::companion< _Scalar, _Deg >::denseMatrix ( ) const

inline

Definition at line 81 of file Companion.h.

operator()()

template<typename _Scalar, int _Deg>

EIGEN_STRONG_INLINE const _Scalar Eigen::internal::companion< _Scalar, _Deg >::operator() ( Index  row, Index  col  ) const

inline

Definition at line 57 of file Companion.h.

setPolynomial()

template<typename _Scalar, int _Deg>

template<typename VectorType >

void Eigen::internal::companion< _Scalar, _Deg >::setPolynomial ( const VectorType &  poly )

inline

Definition at line 69 of file Companion.h.

Member Data Documentation

m_bl_diag

template<typename _Scalar, int _Deg>

BottomLeftDiagonal Eigen::internal::companion< _Scalar, _Deg >::m_bl_diag

protected

Definition at line 128 of file Companion.h.

m_monic

template<typename _Scalar, int _Deg>

RightColumn Eigen::internal::companion< _Scalar, _Deg >::m_monic

protected

Definition at line 127 of file Companion.h.

---

The documentation for this class was generated from the following file:

• Companion.h