isam::SparseMatrix Class Reference

Inheritance diagram for isam::SparseMatrix:

List of all members.

Public Member Functions
	SparseMatrix (int num_rows, int num_cols)
	SparseMatrix (const SparseMatrix &mat)
	SparseMatrix (const SparseMatrix &mat, int num_rows, int num_cols, int first_row=0, int first_col=0)
	SparseMatrix (int num_rows, int num_cols, SparseVector_p *rows)
virtual	~SparseMatrix ()
const SparseMatrix &	operator= (const SparseMatrix &mat)
virtual double	operator() (int row, int col) const
virtual void	set (int row, int col, const double val, bool grow_matrix=false)
virtual void	append_in_row (int row, int col, const double val)
virtual int	nnz () const
virtual int	max_nz () const
virtual void	print (std::ostream &out=std::cout) const
virtual void	print (const std::string &file_name) const
virtual void	print_stats () const
virtual void	print_pattern () const
virtual void	save_pattern_eps (const std::string &file_name) const
virtual const SparseVector &	get_row (int row) const
virtual void	set_row (int row, const SparseVector &new_row)
virtual void	import_rows (int num_rows, int num_cols, SparseVector_p *rows)
virtual void	append_new_rows (int num)
virtual void	append_new_cols (int num)
virtual void	ensure_num_rows (int num_rows)
virtual void	ensure_num_cols (int num_cols)
virtual void	remove_row ()
virtual void	apply_givens (int row, int col, double *c_givens=NULL, double *s_givens=NULL)
virtual int	triangulate_with_givens ()
int	num_rows () const
int	num_cols () const
Friends
class	OrderedSparseMatrix

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Detailed Description

Definition at line 39 of file SparseMatrix.h.

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Constructor & Destructor Documentation

isam::SparseMatrix::SparseMatrix	(	int	num_rows,
		int	num_cols
	)

Constructor.

Parameters:

num_rows	Initial number of rows.
num_cols	Initial number of columns.

Definition at line 76 of file SparseMatrix.cpp.

isam::SparseMatrix::SparseMatrix

(

const SparseMatrix &

mat

)

Copy constructor.

Parameters:

mat	Matrix to copy.

Definition at line 82 of file SparseMatrix.cpp.

isam::SparseMatrix::SparseMatrix	(	const SparseMatrix &	mat,
		int	num_rows,
		int	num_cols,
		int	first_row = 0,
		int	first_col = 0
	)

Submatrix copy constructor

Parameters:

mat	Matrix to copy.
num_rows	Number of rows to copy.
num_cols	Number of columns to copy.
first_row	Row offset.
first_col	Column offset.

Definition at line 86 of file SparseMatrix.cpp.

isam::SparseMatrix::~SparseMatrix

(

)

[virtual]

Destructor.

Definition at line 105 of file SparseMatrix.cpp.

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Member Function Documentation

void isam::SparseMatrix::append_in_row	(	int	row,
		int	col,
		const double	val
	)		[virtual]

Append a new entry to a row. Allows efficient adding of presorted elements.

Parameters:

row	Row of new entry.
col	Column of new entry - must be after last existing one in this row.
val	Value of new entry.

Definition at line 141 of file SparseMatrix.cpp.

void isam::SparseMatrix::append_new_cols

(

int

num

)

[virtual]

Append new columns to matrix.

Parameters:

num	Number of columns to add.

Reimplemented in isam::OrderedSparseMatrix.

Definition at line 270 of file SparseMatrix.cpp.

void isam::SparseMatrix::append_new_rows

(

int

num

)

[virtual]

Append new rows to matrix.

Parameters:

num	Number of rows to add.

Reimplemented in isam::SparseSystem.

Definition at line 252 of file SparseMatrix.cpp.

void isam::SparseMatrix::apply_givens	(	int	row,
		int	col,
		double *	c_givens = NULL,
		double *	s_givens = NULL
	)		[virtual]

Zero out an entry by applying a Givens rotation. Note that both sparse rows have to be completely 0 on the left of col.

Parameters:

row	The row from which row_bot is taken.
col	The column of row_bot that should become 0.
c_givens	Returns cosine of givens rotation if not NULL.
s_givens	Returns sine of givens rotation if not NULL.

Reimplemented in isam::SparseSystem.

Definition at line 301 of file SparseMatrix.cpp.

void isam::SparseMatrix::ensure_num_cols

(

int

num_cols

)

[virtual]

Grow matrix to given number of columns; ignore if already at least as large.

Parameters:

num_cols

Number of columns.

Definition at line 286 of file SparseMatrix.cpp.

void isam::SparseMatrix::ensure_num_rows

(

int

num_rows

)

[virtual]

Grow matrix to given number of rows; ignore if already at least as large.

Parameters:

num_rows

Number of rows.

Definition at line 279 of file SparseMatrix.cpp.

const SparseVector & isam::SparseMatrix::get_row

(

int

row

)

const [virtual]

Return a sparse row.

Parameters:

row	Number of row to return.

Returns:

Sparse row vector.

Definition at line 230 of file SparseMatrix.cpp.

void isam::SparseMatrix::import_rows	(	int	num_rows,
		int	num_cols,
		SparseVector_p *	rows
	)		[virtual]

Import externally allocated rows.

Parameters:

num_rows	Number of rows of new matrix.
num_cols	Number of columns of new matrix.
rows	Array of SparseVector of length num_rows.

Definition at line 240 of file SparseMatrix.cpp.

int isam::SparseMatrix::max_nz

(

)

const [virtual]

Determine maximum number of non-zero entries in any column.

Returns:

Maximum number of non-zero entries in any column.

Definition at line 155 of file SparseMatrix.cpp.

int isam::SparseMatrix::nnz

(

)

const [virtual]

Determine number of non-zero entries in sparse matrix.

Returns:

Number of non-zero entries.

Definition at line 147 of file SparseMatrix.cpp.

double isam::SparseMatrix::operator()	(	int	row,
		int	col
	)		const [virtual]

Read a matrix entry.

Parameters:

row	Row of entry.
col	Column of entry.

Returns:

Value of entry.

Definition at line 124 of file SparseMatrix.cpp.

const SparseMatrix & isam::SparseMatrix::operator=

(

const SparseMatrix &

mat

)

Assignment operator.

Parameters:

mat	Right-hand-side matrix in assignment

Returns:

self.

Definition at line 109 of file SparseMatrix.cpp.

void isam::SparseMatrix::print

(

std::ostream &

out = std::cout

)

const [virtual]

Print sparse matrix as triples to stream; also readable by Matlab: "load R.txt; S=spconvert(R); spy(S)"

Parameters:

out	Output stream.

Definition at line 163 of file SparseMatrix.cpp.

void isam::SparseMatrix::print

(

const std::string &

file_name

)

const [virtual]

Print sparse matrix as triples to file

Parameters:

file_name

File name to write sparse matrix to.

Definition at line 175 of file SparseMatrix.cpp.

void isam::SparseMatrix::print_pattern

(

)

const [virtual]

Prints non-zero pattern to stdout.

Definition at line 185 of file SparseMatrix.cpp.

void isam::SparseMatrix::print_stats

(

)

const [virtual]

Print size of matrix and number of entries for debugging.

Definition at line 181 of file SparseMatrix.cpp.

void isam::SparseMatrix::remove_row

(

)

[virtual]

Removes the last row (used in SparseSystem::add_row_givens).

Definition at line 293 of file SparseMatrix.cpp.

void isam::SparseMatrix::save_pattern_eps

(

const std::string &

file_name

)

const [virtual]

Save eps graphics file with sparse matrix patterns.

Definition at line 199 of file SparseMatrix.cpp.

void isam::SparseMatrix::set	(	int	row,
		int	col,
		const double	val,
		bool	grow_matrix = false
	)		[virtual]

Set one entry of the matrix. Non-existing entries are created.

Parameters:

row	Row of entry.
col	Column of entry.
val	New value of entry.
grow_matrix	Enlarge matrix if entry outside current size (default: false).

Definition at line 130 of file SparseMatrix.cpp.

void isam::SparseMatrix::set_row	(	int	row,
		const SparseVector &	new_row
	)		[virtual]

Replace the given row.

Parameters:

row	Number of row to replace.
new_row	New row vector.

Reimplemented in isam::OrderedSparseMatrix.

Definition at line 235 of file SparseMatrix.cpp.

int isam::SparseMatrix::triangulate_with_givens

(

)

[virtual]

Triangulate matrix by applying Givens rotations to all entries below the diagonal.

Returns:

Number of Givens rotations applied (for analysis).

Definition at line 371 of file SparseMatrix.cpp.

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

• include/isam/SparseMatrix.h
• isamlib/SparseMatrix.cpp