XMatrix#

template<int m, int n, typename T = double>
class XMatrix#

Template class representing an m×n matrix with column-major storage.

A template-based matrix class that provides basic matrix operations including arithmetic operations, element access, and matrix transformations. The matrix uses column-major storage order for compatibility with linear algebra libraries.

Note

Matrix elements are stored in column-major order: data[column][row]

Template Parameters:

  • m – Number of rows in the matrix

  • n – Number of columns in the matrix

  • T – Numeric type for matrix elements (defaults to double)

Public Functions

inline XMatrix()#

Default constructor initializes all elements to zero.

inline XMatrix(const XMatrix<m, n> &a)#

Copy constructor creates matrix from another matrix.

Parameters:

a – [in] Source matrix to copy from

template<typename OtherT>
inline XMatrix(const OtherT *ptr)#

Constructor that initializes matrix from pointer to data.

Parameters:

ptr – [in] Pointer to array of m×n elements in row-major order

Template Parameters:

OtherT – Type of source data (automatically converted to T)

inline const XMatrix<m, n> &operator=(const XMatrix<m, n> &a)#

Assignment operator copies data from another matrix.

Parameters:

a – [in] Source matrix to copy from

Returns:

Reference to this matrix after assignment

template<typename OtherT>
inline void SetCol(
int j,
const XMatrix<m, 1, OtherT> &c,
)#

Sets a column of the matrix to the specified column vector.

Parameters:

  • j – [in] Column index (0 to n-1)

  • c – [in] Column vector of size m×1 to set

Template Parameters:

OtherT – Type of source column vector elements

template<typename OtherT>
inline void SetRow(
int i,
const XMatrix<1, n, OtherT> &r,
)#

Sets a row of the matrix to the specified row vector.

Parameters:

  • i – [in] Row index (0 to m-1)

  • r – [in] Row vector of size 1×n to set

Template Parameters:

OtherT – Type of source row vector elements

inline T &operator()(int row, int col)#

Element access operator (non-const version)

Parameters:

  • row – [in] Row index (0 to m-1)

  • col – [in] Column index (0 to n-1)

Returns:

Reference to matrix element at specified position

inline const T &operator()(int row, int col) const#

Element access operator (const version)

Parameters:

  • row – [in] Row index (0 to m-1)

  • col – [in] Column index (0 to n-1)

Returns:

Const reference to matrix element at specified position

inline void SetIdentity()#

Sets the matrix to identity matrix.

Sets diagonal elements to 1.0 and off-diagonal elements to 0.0

Note

Only valid for square matrices (m == n)

Public Members

T data[n][m]#

Matrix data stored in column-major order.

data[column][row] accesses element at specified row and column