\( \newcommand{\E}{\mathrm{E}} \) \( \newcommand{\A}{\mathrm{A}} \) \( \newcommand{\R}{\mathrm{R}} \) \( \newcommand{\N}{\mathrm{N}} \) \( \newcommand{\Q}{\mathrm{Q}} \) \( \newcommand{\Z}{\mathrm{Z}} \) \( \def\ccSum #1#2#3{ \sum_{#1}^{#2}{#3} } \def\ccProd #1#2#3{ \sum_{#1}^{#2}{#3} }\)
CGAL 4.8.1 - CGAL and Solvers
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SparseLinearAlgebraTraits_d::Matrix Concept Reference

Definition

Types

typedef unspecified_type NT
 

Creation

 Matrix (int dimension)
 Create a square matrix initialized with zeros.
 
 Matrix (int rows, int columns)
 Create a rectangular matrix initialized with zeros.
 

Operations

int row_dimension () const
 Return the matrix number of rows.
 
int column_dimension () const
 Return the matrix number of columns.
 
NT get_coef (int row, int column) const
 Read access to a matrix coefficient. More...
 
void add_coef (int row, int column, NT value)
 Write access to a matrix coefficient: a_ij = a_ij + val. More...
 
void set_coef (int row, int column, NT value, bool new_coef=false)
 Write access to a matrix coefficient: a_ij = val. More...
 

Member Function Documentation

void SparseLinearAlgebraTraits_d::Matrix::add_coef ( int  row,
int  column,
NT  value 
)

Write access to a matrix coefficient: a_ij = a_ij + val.

Precondition
0 <= row < row_dimension()
0 <= column < column_dimension()
NT SparseLinearAlgebraTraits_d::Matrix::get_coef ( int  row,
int  column 
) const

Read access to a matrix coefficient.

Precondition
0 <= row < row_dimension()
0 <= column < column_dimension()
void SparseLinearAlgebraTraits_d::Matrix::set_coef ( int  row,
int  column,
NT  value,
bool  new_coef = false 
)

Write access to a matrix coefficient: a_ij = val.

Optimization: Caller can optimize this call by setting new_coef to true if the coefficient does not already exist in the matrix.

Precondition
0 <= i < row_dimension()
0 <= j < column_dimension()