Matrix Class Reference

Square matrix with flat std::vector<double> storage. More...

#include <ell_matrix.hpp>

Public Member Functions
	Matrix (std::size_t ndim, double init=0.0)
	Construct an ndim × ndim matrix.
void	clear (double value=0.0)
	Reset all elements to value.
double &	operator() (std::size_t row, std::size_t col)
	Access element (row, col) — mutable.
const double &	operator() (std::size_t row, std::size_t col) const
	Access element (row, col) — const.
Matrix &	operator*= (double alpha)
	Scale all elements by alpha.
Matrix	operator* (double alpha) const
	Return a scaled copy.
void	identity ()
	Set to identity matrix.
SliceView	diagonal ()
	Mutable view of the diagonal (stride = ndim + 1)
SliceView	row (std::size_t r)
	Mutable view of row r (contiguous, stride = 1)
SliceView	column (std::size_t c)
	Mutable view of column c (strided, stride = ndim)
double	trace () const
	Sum of diagonal elements.

Detailed Description

Square matrix with flat std::vector<double> storage.

Provides element access via operator()(row, col) and strided views (row, column, diagonal) via SliceView, which supports assignment from valarray, scalar fill, element access, and implicit valarray conversion — matching the original std::slice_array<double> API.

Constructor & Destructor Documentation

Matrix()

Matrix::Matrix ( std::size_t  ndim, double  init = 0.0  )

inlineexplicit

Construct an ndim × ndim matrix.

Parameters

[in]	ndim	Number of rows/columns
[in]	init	Fill value (default 0.0)

Member Function Documentation

clear()

void Matrix::clear ( double  value = 0.0 )

inline

Reset all elements to value.

column()

SliceView Matrix::column ( std::size_t  c )

inline

Mutable view of column c (strided, stride = ndim)

diagonal()

SliceView Matrix::diagonal ( )

inline

Mutable view of the diagonal (stride = ndim + 1)

identity()

void Matrix::identity ( )

inline

Set to identity matrix.

operator()() [1/2]

double & Matrix::operator() ( std::size_t  row, std::size_t  col  )

inline

Access element (row, col) — mutable.

operator()() [2/2]

const double & Matrix::operator() ( std::size_t  row, std::size_t  col  ) const

inline

Access element (row, col) — const.

operator*()

Matrix Matrix::operator* ( double  alpha ) const

inline

Return a scaled copy.

operator*=()

Matrix & Matrix::operator*= ( double  alpha )

inline

Scale all elements by alpha.

row()

SliceView Matrix::row ( std::size_t  r )

inline

Mutable view of row r (contiguous, stride = 1)

trace()

double Matrix::trace ( ) const

inline

Sum of diagonal elements.

\[ \operatorname{tr}(A) = \sum_{i=1}^{n} A_{ii} \]

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

• ellalgo/ell_matrix.hpp