Eigen::SkylineInplaceLU< MatrixType > Class Template Reference

Inplace LU decomposition of a skyline matrix and associated features. More...

#include <SkylineInplaceLU.h>

Public Member Functions
void	compute ()
void	computeRowMajor ()
int	flags () const
int	orderingMethod () const
RealScalar	precision () const
void	setFlags (int f)
void	setOrderingMethod (int m)
void	setPrecision (RealScalar v)
	SkylineInplaceLU (MatrixType &matrix, int flags=0)
template<typename BDerived , typename XDerived >
bool	solve (const MatrixBase< BDerived > &b, MatrixBase< XDerived > *x, const int transposed=0) const
bool	succeeded (void) const

Protected Types
typedef MatrixType::Index	Index
typedef NumTraits< typename MatrixType::Scalar >::Real	RealScalar
typedef MatrixType::Scalar	Scalar

Protected Attributes
int	m_flags
MatrixType &	m_lu
RealScalar	m_precision
int	m_status
bool	m_succeeded

Detailed Description

template<typename MatrixType>
class Eigen::SkylineInplaceLU< MatrixType >

Inplace LU decomposition of a skyline matrix and associated features.

Parameters

MatrixType

the type of the matrix of which we are computing the LU factorization

Definition at line 25 of file SkylineInplaceLU.h.

Member Typedef Documentation

template<typename MatrixType >

typedef MatrixType::Index Eigen::SkylineInplaceLU< MatrixType >::Index

protected

Definition at line 28 of file SkylineInplaceLU.h.

template<typename MatrixType >

typedef NumTraits<typename MatrixType::Scalar>::Real Eigen::SkylineInplaceLU< MatrixType >::RealScalar

protected

Definition at line 30 of file SkylineInplaceLU.h.

template<typename MatrixType >

typedef MatrixType::Scalar Eigen::SkylineInplaceLU< MatrixType >::Scalar

protected

Definition at line 27 of file SkylineInplaceLU.h.

Constructor & Destructor Documentation

template<typename MatrixType >

Eigen::SkylineInplaceLU< MatrixType >::SkylineInplaceLU ( MatrixType &  matrix, int  flags = 0  )

inline

Creates a LU object and compute the respective factorization of matrix using flags flags.

Definition at line 36 of file SkylineInplaceLU.h.

Member Function Documentation

template<typename MatrixType >

void Eigen::SkylineInplaceLU< MatrixType >::compute

(

)

Computes/re-computes the LU factorization

Computes / recomputes the in place LU decomposition of the SkylineInplaceLU. using the default algorithm.

Definition at line 120 of file SkylineInplaceLU.h.

template<typename MatrixType >

void Eigen::SkylineInplaceLU< MatrixType >::computeRowMajor

(

)

Definition at line 184 of file SkylineInplaceLU.h.

template<typename MatrixType >

int Eigen::SkylineInplaceLU< MatrixType >::flags ( ) const

inline

Returns

the current flags

Definition at line 76 of file SkylineInplaceLU.h.

template<typename MatrixType >

int Eigen::SkylineInplaceLU< MatrixType >::orderingMethod ( ) const

inline

Definition at line 84 of file SkylineInplaceLU.h.

template<typename MatrixType >

RealScalar Eigen::SkylineInplaceLU< MatrixType >::precision ( ) const

inline

Returns

the current precision.

See also

setPrecision()

Definition at line 59 of file SkylineInplaceLU.h.

template<typename MatrixType >

void Eigen::SkylineInplaceLU< MatrixType >::setFlags ( int  f )

inline

Sets the flags. Possible values are:

• CompleteFactorization
• IncompleteFactorization
• MemoryEfficient
• one of the ordering methods
• etc...

See also

flags()

Definition at line 71 of file SkylineInplaceLU.h.

template<typename MatrixType >

void Eigen::SkylineInplaceLU< MatrixType >::setOrderingMethod ( int  m )

inline

Definition at line 80 of file SkylineInplaceLU.h.

template<typename MatrixType >

void Eigen::SkylineInplaceLU< MatrixType >::setPrecision ( RealScalar  v )

inline

Sets the relative threshold value used to prune zero coefficients during the decomposition.

Setting a value greater than zero speeds up computation, and yields to an imcomplete factorization with fewer non zero coefficients. Such approximate factors are especially useful to initialize an iterative solver.

Note that the exact meaning of this parameter might depends on the actual backend. Moreover, not all backends support this feature.

See also

precision()

Definition at line 52 of file SkylineInplaceLU.h.

template<typename MatrixType >

template<typename BDerived , typename XDerived >

bool Eigen::SkylineInplaceLU< MatrixType >::solve	(	const MatrixBase< BDerived > &	b,
		MatrixBase< XDerived > *	x,
		const int	transposed = 0
	)		const

Returns

the lower triangular matrix L

the upper triangular matrix U

Computes *x = U^-1 L^-1 b

If transpose is set to SvTranspose or SvAdjoint, the solution of the transposed/adjoint system is computed instead.

Not all backends implement the solution of the transposed or adjoint system.

Definition at line 307 of file SkylineInplaceLU.h.

template<typename MatrixType >

bool Eigen::SkylineInplaceLU< MatrixType >::succeeded ( void  ) const

inline

Returns

true if the factorization succeeded

Definition at line 103 of file SkylineInplaceLU.h.

Member Data Documentation

template<typename MatrixType >

int Eigen::SkylineInplaceLU< MatrixType >::m_flags

protected

Definition at line 109 of file SkylineInplaceLU.h.

template<typename MatrixType >

MatrixType& Eigen::SkylineInplaceLU< MatrixType >::m_lu

protected

Definition at line 112 of file SkylineInplaceLU.h.

template<typename MatrixType >

RealScalar Eigen::SkylineInplaceLU< MatrixType >::m_precision

protected

Definition at line 108 of file SkylineInplaceLU.h.

template<typename MatrixType >

int Eigen::SkylineInplaceLU< MatrixType >::m_status

mutableprotected

Definition at line 110 of file SkylineInplaceLU.h.

template<typename MatrixType >

bool Eigen::SkylineInplaceLU< MatrixType >::m_succeeded

protected

Definition at line 111 of file SkylineInplaceLU.h.

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

• SkylineInplaceLU.h