Matrix Class Template Reference

#include <Matrix.h>

Inheritance diagram for Matrix:

List of all members.

Detailed Description

template<class T_>
class OFELI::Matrix< T_ >

Virtual class to handle matrices for all storage formats.

Template Argument :

T_ data type (double, float, ...)


Public Member Functions
virtual void	Add (size_t i, size_t j, const T_ &x)=0
	Add x to entry (i,j).
void	Assembly (const Side *sd, const DMatrix< T_ > &a)
	Assembly of side matrix into global matrix.
void	Assembly (const Side sd, T_ a)
	Assembly of side matrix into global matrix.
void	Assembly (const Element *el, const DMatrix< T_ > &a)
	Assembly of element matrix into global matrix.
void	Assembly (const Element el, T_ a)
	Assembly of element matrix into global matrix.
virtual int	Factor ()=0
	Factorize matrix. Available only if the storage class enables it.
int	FactorAndSolve (Vect< T_ > &b)
	Factorize matrix and solve the linear system.
virtual size_t	getColInd (size_t i) const
	Return Column index for column i (See the description for class SpMatrix).
T_	getDiag (size_t k) const
	Return k-th diagonal entry of A.
virtual T_	getEntry (size_t i, size_t j) const =0
	Return entry (i,j) of matrix if this one is stored, 0 else.
unsigned long	getLength () const
	Return number of stored terms in matrix.
size_t	getNbColumns () const
	Return number of columns.
size_t	getNbRows () const
	Return number of rows.
void	getPrintView (size_t &rmin, size_t &rmax, size_t &cmin, size_t &cmax) const
	Return window data for matrix printing.
virtual size_t	getRowPtr (size_t i) const
	Return Row pointer for row i (See the description for class SpMatrix).
size_t	getSize () const
	Return matrix dimension (Number of rows and columns).
bool	isDiagonal () const
	Say if matrix is diagonal or not.
bool	isFactorized () const
	Say if matrix is factorized or not.
	Matrix (const Matrix< T_ > &m)
	Copy Constructor.
	Matrix ()
	Default constructor.
virtual void	Mult (const Vect< T_ > &x, Vect< T_ > &y) const =0
	Multiply matrix by vector x and save in y.
virtual void	MultAdd (T_ a, const Vect< T_ > &v, Vect< T_ > &w) const =0
	Multiply matrix by vector ax* and add to y.
virtual void	MultAdd (const Vect< T_ > &x, Vect< T_ > &y) const =0
	Multiply matrix by vector x and add to y.
virtual T_	operator() (size_t i, size_t j) const =0
	Operator () (Non constant version).
virtual const T_	operator() (size_t i) const =0
	Operator () with one argument (Constant version).
virtual T_ &	operator() (size_t i, size_t j)=0
	Operator () (Non constant version).
Matrix &	operator*= (const T_ &x)
	Operator *=.
Matrix &	operator+= (const T_ &x)
	Operator +=.
Matrix &	operator+= (const Matrix< T_ > &m)
	Operator +=.
Matrix &	operator-= (const T_ &x)
	Operator -=.
Matrix &	operator-= (const Matrix< T_ > &m)
	Operator -=.
Matrix &	operator= (const T_ &x)
	Operator =.
Matrix &	operator= (Matrix< T_ > &m)
	Operator =.
T_	operator[] (size_t k) const
	Operator [] (Constant version).
T_ &	operator[] (size_t k)
	Operator [] (Non constant version).
void	Prescribe (size_t dof, const class Mesh &mesh, Vect< T_ > &b, const Vect< T_ > &u, int flag=0)
	Impose by a penalty method an essential boundary condition when only one DOF is treated.
void	Prescribe (const class Mesh &mesh, Vect< T_ > &b, int flag=0)
	Impose by a penalty method a homegeneous (=0) essential boundary condition.
void	Prescribe (const class Mesh &mesh, Vect< T_ > &b, const Vect< T_ > &u, int flag=0)
	Impose by a penalty method an essential boundary condition.
void	PrescribeSide (const class Mesh &mesh)
	Impose by a penalty method an essential boundary condition when DOFs are supported by sides.
virtual void	Set (size_t i, size_t j, const T_ &x)=0
	Assign value x to entry (i,j).
void	setDiagonal (const class Mesh &mesh)
	Initialize matrix storage in the case where only diagonal terms are stored.
void	setPenal (double p)
	Set Penalty Parameter (For boundary condition prescription).
void	setPrintView (size_t rmin, size_t rmax, size_t cmin, size_t cmax)
	set a window for matrix printing
int	Solve (const Vect< T_ > &b, Vect< T_ > &x)
	Solve system with factorized matrix (forward and back substitution).
virtual int	Solve (Vect< T_ > &b)=0
	Solve the linear system by a direct method.
virtual void	TMult (const Vect< T_ > &v, Vect< T_ > &w) const =0
	Multiply transpose of matrix by vector x and save in y.
virtual	~Matrix ()
	Destructor.

Constructor & Destructor Documentation

Matrix ( )

Default constructor.

Initializes a zeo-size matrix.

Member Function Documentation

void Assembly	(	const Side *	sd,
		const DMatrix< T_ > &	a
	)

Assembly of side matrix into global matrix.

Case where side matrix is given by a DMatrix instance.

Parameters:

`[in]`	sd	Pointer to side instance
`[in]`	a	Side matrix as a DMatrix instance

References Matrix::Add(), Node::getDOF(), Node::getNbDOF(), Side::getNbNodes(), and Side::getPtrNode().

void Assembly	(	const Side *	sd,
		T_ *	a
	)

Assembly of side matrix into global matrix.

Case where side matrix is given by a C-array.

Parameters:

`[in]`	sd	Pointer to side instance
`[in]`	a	Side matrix as a C-array instance

References Matrix::Add(), Node::getDOF(), Node::getNbDOF(), Side::getNbNodes(), and Side::getPtrNode().

void Assembly	(	const Element *	el,
		const DMatrix< T_ > &	a
	)

Assembly of element matrix into global matrix.

Case where element matrix is given by a DMatrix instance.

Parameters:

`[in]`	el	Pointer to element instance
`[in]`	a	Element matrix as a DMatrix instance

References Matrix::Add(), Node::getDOF(), Node::getNbDOF(), Element::getNbNodes(), and Element::getPtrNode().

void Assembly	(	const Element *	el,
		T_ *	a
	)

Assembly of element matrix into global matrix.

Case where element matrix is given by a C-array.

Parameters:

`[in]`	el	Pointer to element instance
`[in]`	a	Element matrix as a C-array

References Matrix::Add(), Node::getDOF(), Node::getNbDOF(), Element::getNbNodes(), and Element::getPtrNode().

int FactorAndSolve ( Vect< T_ > & b )

Factorize matrix and solve the linear system.

This is available only if the storage class enables it.

References Matrix::Factor(), and Matrix::Solve().

T_ getDiag ( size_t k ) const

Return k-th diagonal entry of A.

First entry is given by GetDiag(1).

void getPrintView	(	size_t &	rmin,
		size_t &	rmax,
		size_t &	cmin,
		size_t &	cmax
	)			const

Return window data for matrix printing.

Parameters:

`[out]`	rmin	first row index to view
`[out]`	rmax	last row index to view
`[out]`	cmin	first column index to view
`[out]`	cmax	last column index to view

Referenced by OFELI::operator<<().

bool isFactorized ( ) const

Say if matrix is factorized or not.

If the matrix was not factorized, the class does not allow solving by a direct solver.

virtual T_ operator()	(	size_t	i,
		size_t	j
	)			const `[pure virtual]`

Operator () (Non constant version).

Parameters:

`[in]`	i	Row index
`[in]`	j	Column index

Implemented in DMatrix, DSMatrix, SkMatrix, SkSMatrix, SpMatrix, TrMatrix, DMatrix< double >, and SpMatrix< double >.

virtual const T_ operator() ( size_t i ) const [pure virtual]

Operator () with one argument (Constant version).

Returns i-th position in the array storing matrix entries. The first entry is at location 1. Entries are stored row by row.

Implemented in DMatrix, SkMatrix, SkSMatrix, SpMatrix, TrMatrix, DMatrix< double >, and SpMatrix< double >.

virtual T_& operator()	(	size_t	i,
		size_t	j
	)			`[pure virtual]`

Operator () (Non constant version).

Parameters:

`[in]`	i	Row index
`[in]`	j	Column index

Implemented in DMatrix, DSMatrix, SkMatrix, SkSMatrix, SpMatrix, TrMatrix, DMatrix< double >, and SpMatrix< double >.

Matrix< T_ > & operator*= ( const T_ & x )

Operator *=.

Premultiply matrix entries by constant value x.

Reimplemented in DMatrix, SkMatrix, SkSMatrix, TrMatrix, and DMatrix< double >.

Matrix< T_ > & operator+= ( const T_ & x )

Operator +=.

Add constant value x to all matrix entries.

Reimplemented in DMatrix, SkMatrix, and DMatrix< double >.

Matrix< T_ > & operator+= ( const Matrix< T_ > & m )

Operator +=.

Add matrix m to current matrix instance.

Matrix< T_ > & operator-= ( const T_ & x )

Operator -=.

Subtract constant value x from all matrix entries.

Reimplemented in DMatrix, and DMatrix< double >.

Matrix< T_ > & operator-= ( const Matrix< T_ > & m )

Operator -=.

Subtract matrix m from current matrix instance.

Matrix< T_ > & operator= ( const T_ & x )

Operator =.

Assign constant value x to all matrix entries.

Reimplemented in DMatrix, DSMatrix, SkMatrix, SkSMatrix, SpMatrix, TrMatrix, DMatrix< double >, and SpMatrix< double >.

Matrix< T_ > & operator= ( Matrix< T_ > & m )

Operator =.

Copy matrix m to current matrix instance.

T_ operator[] ( size_t k ) const

Operator [] (Constant version).

Returns k-th stored element in matrix Index k starts at 0.

Reimplemented in SpMatrix, and SpMatrix< double >.

T_& operator[] ( size_t k )

Operator [] (Non constant version).

Returns k-th stored element in matrix Index k starts at 0.

void Prescribe	(	size_t	dof,
		const class Mesh &	mesh,
		Vect< T_ > &	b,
		const Vect< T_ > &	u,
		int	flag = `0`
	)

Impose by a penalty method an essential boundary condition when only one DOF is treated.

This member function modifies diagonal terms in matrix and terms in vector that correspond to degrees of freedom with nonzero code in order to impose a boundary condition. This gunction is to be used if only one DOF per node is treated in the linear system. The penalty parameter is by default equal to 1.e20. It can be modified by member function setPenal.

Parameters:

`[in]`	dof	Label of the concerned degree of freedom (DOF).
`[in]`	mesh	Mesh instance from which information is extracted.
`[in,out]`	b	Vect instance that contains right-hand side.
`[in]`	u	Vect instance that conatins imposed valued at DOFs where they are to be imposed.
`[in]`	flag	Parameter to determine whether only the right-hand side is to be modified (dof>0) or both matrix and right-hand side (dof=0, default value).

References Node::getCode(), Matrix::getEntry(), Node::getLabel(), Mesh::getNode(), Matrix::Set(), and Mesh::topNode().

void Prescribe	(	const class Mesh &	mesh,
		Vect< T_ > &	b,
		int	flag = `0`
	)

Impose by a penalty method a homegeneous (=0) essential boundary condition.

This member function modifies diagonal terms in matrix and terms in vector that correspond to degrees of freedom with nonzero code in order to impose a boundary condition. The penalty parameter is defined by default equal to 1.e20. It can be modified by member function setPenal(..).

Parameters:

`[in]`	mesh	Mesh instance from which information is extracted.
`[in,out]`	b	Vect instance that contains right-hand side.
`[in]`	flag	Parameter to determine whether only the right-hand side is to be modified (dof>0) or both matrix and right-hand side (dof=0, default value).

References Node::getCode(), Node::getDOF(), Matrix::getEntry(), Node::getNbDOF(), Mesh::getNode(), Matrix::Set(), and Mesh::topNode().

void Prescribe	(	const class Mesh &	mesh,
		Vect< T_ > &	b,
		const Vect< T_ > &	u,
		int	flag = `0`
	)

Impose by a penalty method an essential boundary condition.

This member function modifies diagonal terms in matrix and terms in vector that correspond to degrees of freedom with nonzero code in order to impose a boundary condition. The penalty parameter is defined by default equal to 1.e20. It can be modified by member function setPenal(..).

Parameters:

`[in]`	mesh	Mesh instance from which information is extracted.
`[in,out]`	b	Vect instance that contains right-hand side.
`[in]`	u	Vect instance that conatins imposed valued at DOFs where they are to be imposed.
`[in]`	flag	Parameter to determine whether only the right-hand side is to be modified (dof>0) or both matrix and right-hand side (dof=0, default value).

References Node::getCode(), Node::getDOF(), Matrix::getEntry(), Node::getNbDOF(), Mesh::getNode(), Matrix::Set(), and Mesh::topNode().

void PrescribeSide ( const class Mesh & mesh )

Impose by a penalty method an essential boundary condition when DOFs are supported by sides.

This member function modifies diagonal terms in matrix and terms in vector that correspond to degrees of freedom with nonzero code in order to impose a boundary condition. The penalty parameter is defined by default equal to 1.e20. It can be modified by member function setPenal(..).

Parameters:

[in] mesh Mesh instance from which information is extracted.

References Side::getCode(), Side::getDOF(), Matrix::getEntry(), Side::getNbDOF(), Mesh::getSide(), Matrix::Set(), and Mesh::topSide().

void setDiagonal ( const class Mesh & mesh )

Initialize matrix storage in the case where only diagonal terms are stored.

This member function is to be used for explicit time integration schemes

References OFELI::Clear(), and Mesh::getNbEq().

void setPrintView	(	size_t	rmin,
		size_t	rmax,
		size_t	cmin,
		size_t	cmax
	)

set a window for matrix printing

Parameters:

`[in]`	rmin	first row index to view
`[in]`	rmax	last row index to view
`[in]`	cmin	first column index to view
`[in]`	cmax	last column index to view

Reimplemented in DMatrix, DSMatrix, and DMatrix< double >.

int Solve	(	const Vect< T_ > &	b,
		Vect< T_ > &	x
	)

Solve system with factorized matrix (forward and back substitution).

Parameters:

`[in]`	b	Vect instance that contains right-hand side
`[out]`	x	Vect instance that contains solution

Return values:

0

if solution was normally performed, n if the n-th pivot is null. Solution is performed only is factorization has previouly been invoked.

Reimplemented in DMatrix, DSMatrix, SkMatrix, SkSMatrix, SpMatrix, DMatrix< double >, and SpMatrix< double >.

References Matrix::Solve().

virtual int Solve ( Vect< T_ > & b ) [pure virtual]

Solve the linear system by a direct method.

This is available only if the storage class enables it and if matrix has been primarily factorized (See isFactorized).

Implemented in DMatrix, DSMatrix, SkMatrix, SkSMatrix, SpMatrix, TrMatrix, DMatrix< double >, and SpMatrix< double >.

Referenced by Matrix::FactorAndSolve(), and Matrix::Solve().

Matrix Class Template Reference

Detailed Description

template<class T_> class OFELI::Matrix< T_ >

Public Member Functions

Constructor & Destructor Documentation

Member Function Documentation

template<class T_>
class OFELI::Matrix< T_ >