A direct sparse LDLT Cholesky factorizations without square root. More...

#include <SimplicialCholesky.h>

Inheritance diagram for Eigen::SimplicialLDLT< _MatrixType, _UpLo >:

Public Types
enum	{ UpLo = _UpLo }

typedef SimplicialCholeskyBase< SimplicialLDLT >	Base

typedef SparseMatrix< Scalar, ColMajor, Index >	CholMatrixType

typedef MatrixType::Index	Index

typedef Traits::MatrixL	MatrixL

typedef _MatrixType	MatrixType

typedef Traits::MatrixU	MatrixU

typedef MatrixType::RealScalar	RealScalar

typedef MatrixType::Scalar	Scalar

typedef internal::traits< SimplicialLDLT >	Traits

typedef Matrix< Scalar, Dynamic, 1 >	VectorType

Public Types inherited from Eigen::SimplicialCholeskyBase< SimplicialLDLT< _MatrixType, _UpLo > >
enum

typedef SparseMatrix< Scalar, ColMajor, Index >	CholMatrixType

typedef MatrixType::Index	Index

typedef internal::traits< SimplicialLDLT< _MatrixType, _UpLo > >::MatrixType	MatrixType

typedef MatrixType::RealScalar	RealScalar

typedef MatrixType::Scalar	Scalar

typedef Matrix< Scalar, Dynamic, 1 >	VectorType

Public Member Functions
void	analyzePattern (const MatrixType &a)

SimplicialLDLT &	compute (const MatrixType &matrix)

Scalar	determinant () const

void	factorize (const MatrixType &a)

const MatrixL	matrixL () const

const MatrixU	matrixU () const

	SimplicialLDLT ()

	SimplicialLDLT (const MatrixType &matrix)

const VectorType	vectorD () const

Public Member Functions inherited from Eigen::SimplicialCholeskyBase< SimplicialLDLT< _MatrixType, _UpLo > >
void	_solve (const MatrixBase< Rhs > &b, MatrixBase< Dest > &dest) const

Index	cols () const

SimplicialLDLT< _MatrixType, _UpLo > &	derived ()

const SimplicialLDLT< _MatrixType, _UpLo > &	derived () const

void	dumpMemory (Stream &s)

ComputationInfo	info () const
	Reports whether previous computation was successful. More...

const PermutationMatrix< Dynamic, Dynamic, Index > &	permutationP () const

const PermutationMatrix< Dynamic, Dynamic, Index > &	permutationPinv () const

Index	rows () const

SimplicialLDLT< _MatrixType, _UpLo > &	setShift (const RealScalar &offset, const RealScalar &scale=1)

	SimplicialCholeskyBase ()

	SimplicialCholeskyBase (const MatrixType &matrix)

const internal::solve_retval< SimplicialCholeskyBase, Rhs >	solve (const MatrixBase< Rhs > &b) const

const internal::sparse_solve_retval< SimplicialCholeskyBase, Rhs >	solve (const SparseMatrixBase< Rhs > &b) const

	~SimplicialCholeskyBase ()

Additional Inherited Members
Protected Member Functions inherited from Eigen::SimplicialCholeskyBase< SimplicialLDLT< _MatrixType, _UpLo > >
void	analyzePattern (const MatrixType &a, bool doLDLT)

void	analyzePattern_preordered (const CholMatrixType &a, bool doLDLT)

void	compute (const MatrixType &matrix)

void	factorize (const MatrixType &a)

void	factorize_preordered (const CholMatrixType &a)

void	ordering (const MatrixType &a, CholMatrixType &ap)

Protected Attributes inherited from Eigen::SimplicialCholeskyBase< SimplicialLDLT< _MatrixType, _UpLo > >
bool	m_analysisIsOk

VectorType	m_diag

bool	m_factorizationIsOk

ComputationInfo	m_info

bool	m_isInitialized

CholMatrixType	m_matrix

VectorXi	m_nonZerosPerCol

PermutationMatrix< Dynamic, Dynamic, Index >	m_P

VectorXi	m_parent

PermutationMatrix< Dynamic, Dynamic, Index >	m_Pinv

RealScalar	m_shiftOffset

RealScalar	m_shiftScale

Detailed Description

template<typename _MatrixType, int _UpLo>
class Eigen::SimplicialLDLT< _MatrixType, _UpLo >

A direct sparse LDLT Cholesky factorizations without square root.

This class provides a LDL^T Cholesky factorizations without square root of sparse matrices that are selfadjoint and positive definite. The factorization allows for solving A.X = B where X and B can be either dense or sparse.

In order to reduce the fill-in, a symmetric permutation P is applied prior to the factorization such that the factorized matrix is P A P^-1.

Template Parameters

_MatrixType	the type of the sparse matrix A, it must be a SparseMatrix<>
_UpLo	the triangular part that will be used for the computations. It can be Lower or Upper. Default is Lower.

See also: class SimplicialLLT

Definition at line 244 of file SimplicialCholesky.h.

Member Typedef Documentation

◆ Base

template<typename _MatrixType , int _UpLo>

typedef SimplicialCholeskyBase<SimplicialLDLT> Eigen::SimplicialLDLT< _MatrixType, _UpLo >::Base

Definition at line 394 of file SimplicialCholesky.h.

◆ CholMatrixType

template<typename _MatrixType , int _UpLo>

typedef SparseMatrix<Scalar,ColMajor,Index> Eigen::SimplicialLDLT< _MatrixType, _UpLo >::CholMatrixType

Definition at line 398 of file SimplicialCholesky.h.

◆ Index

template<typename _MatrixType , int _UpLo>

typedef MatrixType::Index Eigen::SimplicialLDLT< _MatrixType, _UpLo >::Index

Definition at line 397 of file SimplicialCholesky.h.

◆ MatrixL

template<typename _MatrixType , int _UpLo>

typedef Traits::MatrixL Eigen::SimplicialLDLT< _MatrixType, _UpLo >::MatrixL

Definition at line 401 of file SimplicialCholesky.h.

◆ MatrixType

template<typename _MatrixType , int _UpLo>

typedef _MatrixType Eigen::SimplicialLDLT< _MatrixType, _UpLo >::MatrixType

Definition at line 392 of file SimplicialCholesky.h.

◆ MatrixU

template<typename _MatrixType , int _UpLo>

typedef Traits::MatrixU Eigen::SimplicialLDLT< _MatrixType, _UpLo >::MatrixU

Definition at line 402 of file SimplicialCholesky.h.

◆ RealScalar

template<typename _MatrixType , int _UpLo>

typedef MatrixType::RealScalar Eigen::SimplicialLDLT< _MatrixType, _UpLo >::RealScalar

Definition at line 396 of file SimplicialCholesky.h.

◆ Scalar

template<typename _MatrixType , int _UpLo>

typedef MatrixType::Scalar Eigen::SimplicialLDLT< _MatrixType, _UpLo >::Scalar

Definition at line 395 of file SimplicialCholesky.h.

◆ Traits

template<typename _MatrixType , int _UpLo>

typedef internal::traits<SimplicialLDLT> Eigen::SimplicialLDLT< _MatrixType, _UpLo >::Traits

Definition at line 400 of file SimplicialCholesky.h.

◆ VectorType

template<typename _MatrixType , int _UpLo>

typedef Matrix<Scalar,Dynamic,1> Eigen::SimplicialLDLT< _MatrixType, _UpLo >::VectorType

Definition at line 399 of file SimplicialCholesky.h.

Member Enumeration Documentation

◆ anonymous enum

template<typename _MatrixType , int _UpLo>

anonymous enum

Enumerator
UpLo

Definition at line 393 of file SimplicialCholesky.h.

Constructor & Destructor Documentation

◆ SimplicialLDLT() [1/2]

template<typename _MatrixType , int _UpLo>

Eigen::SimplicialLDLT< _MatrixType, _UpLo >::SimplicialLDLT ( )

inline

Default constructor

Definition at line 405 of file SimplicialCholesky.h.

◆ SimplicialLDLT() [2/2]

template<typename _MatrixType , int _UpLo>

Eigen::SimplicialLDLT< _MatrixType, _UpLo >::SimplicialLDLT ( const MatrixType & matrix )

inline

Constructs and performs the LLT factorization of matrix

Definition at line 408 of file SimplicialCholesky.h.

Member Function Documentation

◆ analyzePattern()

template<typename _MatrixType , int _UpLo>

void Eigen::SimplicialLDLT< _MatrixType, _UpLo >::analyzePattern ( const MatrixType & a )

inline

Performs a symbolic decomposition on the sparcity of matrix.

This function is particularly useful when solving for several problems having the same structure.

See also: factorize()

Definition at line 441 of file SimplicialCholesky.h.

◆ compute()

template<typename _MatrixType , int _UpLo>

SimplicialLDLT& Eigen::SimplicialLDLT< _MatrixType, _UpLo >::compute ( const MatrixType & matrix )

inline

Computes the sparse Cholesky decomposition of matrix

Definition at line 429 of file SimplicialCholesky.h.

◆ determinant()

template<typename _MatrixType , int _UpLo>

Scalar Eigen::SimplicialLDLT< _MatrixType, _UpLo >::determinant ( ) const

inline

Returns: the determinant of the underlying matrix from the current factorization

Definition at line 458 of file SimplicialCholesky.h.

◆ factorize()

template<typename _MatrixType , int _UpLo>

void Eigen::SimplicialLDLT< _MatrixType, _UpLo >::factorize ( const MatrixType & a )

inline

Performs a numeric decomposition of matrix

The given matrix must has the same sparcity than the matrix on which the symbolic decomposition has been performed.

See also: analyzePattern()

Definition at line 452 of file SimplicialCholesky.h.

◆ matrixL()

template<typename _MatrixType , int _UpLo>

const MatrixL Eigen::SimplicialLDLT< _MatrixType, _UpLo >::matrixL ( ) const

inline

Returns: an expression of the factor L

Definition at line 417 of file SimplicialCholesky.h.

◆ matrixU()

template<typename _MatrixType , int _UpLo>

const MatrixU Eigen::SimplicialLDLT< _MatrixType, _UpLo >::matrixU ( ) const

inline

Returns: an expression of the factor U (= L^*)

Definition at line 423 of file SimplicialCholesky.h.

◆ vectorD()

template<typename _MatrixType , int _UpLo>

const VectorType Eigen::SimplicialLDLT< _MatrixType, _UpLo >::vectorD ( ) const

inline

Returns: a vector expression of the diagonal D

Definition at line 412 of file SimplicialCholesky.h.

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

SimplicialCholesky.h

Public Types

Public Member Functions

Additional Inherited Members

Detailed Description

template<typename _MatrixType, int _UpLo> class Eigen::SimplicialLDLT< _MatrixType, _UpLo >

Member Typedef Documentation

◆ Base

◆ CholMatrixType

◆ Index

◆ MatrixL

◆ MatrixType

◆ MatrixU

◆ RealScalar

◆ Scalar

◆ Traits

◆ VectorType

Member Enumeration Documentation

◆ anonymous enum

Constructor & Destructor Documentation

◆ SimplicialLDLT() [1/2]

◆ SimplicialLDLT() [2/2]

Member Function Documentation

◆ analyzePattern()

◆ compute()

◆ determinant()

◆ factorize()

◆ matrixL()

◆ matrixU()

◆ vectorD()

template<typename _MatrixType, int _UpLo>
class Eigen::SimplicialLDLT< _MatrixType, _UpLo >