#include <deal.II/lac/block_sparse_matrix_ez.h>

Inheritance diagram for BlockSparseMatrixEZ< Number >:

Public Types
using	size_type = types::global_dof_index

Public Member Functions
	BlockSparseMatrixEZ ()=default

	BlockSparseMatrixEZ (const unsigned int block_rows, const unsigned int block_cols)

	BlockSparseMatrixEZ (const BlockSparseMatrixEZ< Number > &)

BlockSparseMatrixEZ &	operator= (const BlockSparseMatrixEZ< Number > &)

BlockSparseMatrixEZ &	operator= (const double d)

void	clear ()

void	reinit (const unsigned int n_block_rows, const unsigned int n_block_cols)

void	collect_sizes ()

SparseMatrixEZ< Number > &	block (const unsigned int row, const unsigned int column)

const SparseMatrixEZ< Number > &	block (const unsigned int row, const unsigned int column) const

unsigned int	n_block_rows () const

unsigned int	n_block_cols () const

bool	empty () const

size_type	m () const

size_type	n () const

void	set (const size_type i, const size_type j, const Number value)

void	add (const size_type i, const size_type j, const Number value)

template<typename somenumber >
void	vmult (BlockVector< somenumber > &dst, const BlockVector< somenumber > &src) const

template<typename somenumber >
void	Tvmult (BlockVector< somenumber > &dst, const BlockVector< somenumber > &src) const

template<typename somenumber >
void	vmult_add (BlockVector< somenumber > &dst, const BlockVector< somenumber > &src) const

template<typename somenumber >
void	Tvmult_add (BlockVector< somenumber > &dst, const BlockVector< somenumber > &src) const

template<class StreamType >
void	print_statistics (StreamType &s, bool full=false)

Public Member Functions inherited from Subscriptor
	Subscriptor ()

	Subscriptor (const Subscriptor &)

	Subscriptor (Subscriptor &&) noexcept

virtual	~Subscriptor ()

Subscriptor &	operator= (const Subscriptor &)

Subscriptor &	operator= (Subscriptor &&) noexcept

void	subscribe (const char *identifier=nullptr) const

void	unsubscribe (const char *identifier=nullptr) const

unsigned int	n_subscriptions () const

template<typename StreamType >
void	list_subscribers (StreamType &stream) const

void	list_subscribers () const

template<class Archive >
void	serialize (Archive &ar, const unsigned int version)

Private Attributes
BlockIndices	row_indices

BlockIndices	column_indices

Table< 2, SparseMatrixEZ< Number > >	blocks

Additional Inherited Members
Static Public Member Functions inherited from Subscriptor
static::ExceptionBase &	ExcInUse (int arg1, std::string arg2, std::string arg3)

static::ExceptionBase &	ExcNoSubscriber (std::string arg1, std::string arg2)

Detailed Description

template<typename Number>
class BlockSparseMatrixEZ< Number >

A block matrix consisting of blocks of type SparseMatrixEZ.

Like the other Block-objects, this matrix can be used like a SparseMatrixEZ, when it comes to access to entries. Then, there are functions for the multiplication with BlockVector and access to the individual blocks.

See also: Block (linear algebra)

Author: Guido Kanschat, 2002, 2003

Definition at line 1877 of file affine_constraints.h.

Member Typedef Documentation

template<typename Number>

using BlockSparseMatrixEZ< Number >::size_type = types::global_dof_index

Declare type for container size.

Definition at line 64 of file block_sparse_matrix_ez.h.

Constructor & Destructor Documentation

template<typename Number>

BlockSparseMatrixEZ< Number >::BlockSparseMatrixEZ ( )

default

Default constructor. The result is an empty object with zero dimensions.

template<typename Number>

BlockSparseMatrixEZ< Number >::BlockSparseMatrixEZ	(	const unsigned int	block_rows,
		const unsigned int	block_cols
	)

Constructor setting up an object with given number of block rows and columns. The blocks themselves still have zero dimension.

template<typename Number>

BlockSparseMatrixEZ< Number >::BlockSparseMatrixEZ ( const BlockSparseMatrixEZ< Number > & )

Copy constructor. This is needed for some container classes. It creates an object of the same number of block rows and columns. Since it calls the copy constructor of SparseMatrixEZ, the block s must be empty.

Member Function Documentation

template<typename Number>

BlockSparseMatrixEZ& BlockSparseMatrixEZ< Number >::operator= ( const BlockSparseMatrixEZ< Number > & )

Copy operator. Like the copy constructor, this may be called for objects with empty blocks only.

template<typename Number>

BlockSparseMatrixEZ& BlockSparseMatrixEZ< Number >::operator= ( const double d )

This operator assigns a scalar to a matrix. Since this does usually not make much sense (should we set all matrix entries to this value? Only the nonzero entries of the sparsity pattern?), this operation is only allowed if the actual value to be assigned is zero. This operator only exists to allow for the obvious notation matrix=0, which sets all elements of the matrix to zero, but keep the sparsity pattern previously used.

template<typename Number>

void BlockSparseMatrixEZ< Number >::clear ( )

Set matrix to zero dimensions and release memory.

template<typename Number>

void BlockSparseMatrixEZ< Number >::reinit	(	const unsigned int	n_block_rows,
		const unsigned int	n_block_cols
	)

Initialize to given block numbers. After this operation, the matrix will have the block dimensions provided. Each block will have zero dimensions and must be initialized subsequently. After setting the sizes of the blocks, collect_sizes() must be called to update internal data structures.

template<typename Number>

void BlockSparseMatrixEZ< Number >::collect_sizes ( )

This function collects the sizes of the sub-objects and stores them in internal arrays, in order to be able to relay global indices into the matrix to indices into the subobjects. You must call this function each time after you have changed the size of the sub-objects.

template<typename Number >

SparseMatrixEZ< Number > & BlockSparseMatrixEZ< Number >::block	(	const unsigned int	row,
		const unsigned int	column
	)

inline

Access the block with the given coordinates.

Definition at line 288 of file block_sparse_matrix_ez.h.

template<typename Number >

const SparseMatrixEZ< Number > & BlockSparseMatrixEZ< Number >::block	(	const unsigned int	row,
		const unsigned int	column
	)		const

inline

Access the block with the given coordinates. Version for constant objects.

Definition at line 301 of file block_sparse_matrix_ez.h.

template<typename Number >

unsigned int BlockSparseMatrixEZ< Number >::n_block_rows ( ) const

inline

Return the number of blocks in a column.

Definition at line 270 of file block_sparse_matrix_ez.h.

template<typename Number >

unsigned int BlockSparseMatrixEZ< Number >::n_block_cols ( ) const

inline

Return the number of blocks in a row.

Definition at line 279 of file block_sparse_matrix_ez.h.

template<typename Number>

bool BlockSparseMatrixEZ< Number >::empty ( ) const

Return whether the object is empty. It is empty if no memory is allocated, which is the same as that both dimensions are zero. This function is just the concatenation of the respective call to all sub- matrices.

template<typename Number >

BlockSparseMatrixEZ< Number >::size_type BlockSparseMatrixEZ< Number >::m ( ) const

inline

Return number of rows of this matrix, which equals the dimension of the codomain (or range) space. It is the sum of the number of rows over the sub-matrix blocks of this matrix. Recall that the matrix is of size m() times n().

Definition at line 314 of file block_sparse_matrix_ez.h.

template<typename Number >

BlockSparseMatrixEZ< Number >::size_type BlockSparseMatrixEZ< Number >::n ( ) const

inline

Return number of columns of this matrix, which equals the dimension of the domain space. It is the sum of the number of columns over the sub- matrix blocks of this matrix. Recall that the matrix is of size m() times n().

Definition at line 323 of file block_sparse_matrix_ez.h.

template<typename Number >

void BlockSparseMatrixEZ< Number >::set	(	const size_type	i,
		const size_type	j,
		const Number	value
	)

inline

Set the element (i,j) to value. Throws an error if the entry does not exist or if value is not a finite number. Still, it is allowed to store zero values in non-existent fields.

Definition at line 332 of file block_sparse_matrix_ez.h.

template<typename Number >

void BlockSparseMatrixEZ< Number >::add	(	const size_type	i,
		const size_type	j,
		const Number	value
	)

inline

Add value to the element (i,j). Throws an error if the entry does not exist or if value is not a finite number. Still, it is allowed to store zero values in non-existent fields.

Definition at line 350 of file block_sparse_matrix_ez.h.

template<typename Number >

template<typename somenumber >

void BlockSparseMatrixEZ< Number >::vmult	(	BlockVector< somenumber > &	dst,
		const BlockVector< somenumber > &	src
	)		const

Matrix-vector multiplication: let \(dst = M*src\) with \(M\) being this matrix.

Definition at line 368 of file block_sparse_matrix_ez.h.

template<typename Number >

template<typename somenumber >

void BlockSparseMatrixEZ< Number >::Tvmult	(	BlockVector< somenumber > &	dst,
		const BlockVector< somenumber > &	src
	)		const

Matrix-vector multiplication: let \(dst = M^T*src\) with \(M\) being this matrix. This function does the same as vmult() but takes the transposed matrix.

Definition at line 406 of file block_sparse_matrix_ez.h.

template<typename Number >

template<typename somenumber >

void BlockSparseMatrixEZ< Number >::vmult_add	(	BlockVector< somenumber > &	dst,
		const BlockVector< somenumber > &	src
	)		const

Adding Matrix-vector multiplication. Add \(M*src\) on \(dst\) with \(M\) being this matrix.

Definition at line 388 of file block_sparse_matrix_ez.h.

template<typename Number >

template<typename somenumber >

void BlockSparseMatrixEZ< Number >::Tvmult_add	(	BlockVector< somenumber > &	dst,
		const BlockVector< somenumber > &	src
	)		const

Adding Matrix-vector multiplication. Add \(M^T*src\) to \(dst\) with \(M\) being this matrix. This function does the same as vmult_add() but takes the transposed matrix.

Definition at line 426 of file block_sparse_matrix_ez.h.

template<typename number >

template<class StreamType >

void BlockSparseMatrixEZ< number >::print_statistics	(	StreamType &	s,
		bool	full = `false`
	)

inline

Print statistics. If full is true, prints a histogram of all existing row lengths and allocated row lengths. Otherwise, just the relation of allocated and used entries is shown.

Definition at line 444 of file block_sparse_matrix_ez.h.