Module matrix 

Dense row-major matrix type and utility functions.

Matrix<T> is a simple dense 2D matrix in row-major layout, indexed by m[[row, col]]. It is used throughout the TCI infrastructure for pivot block computations, cross interpolation factors, and dense submatrix extraction.

Examples

use tensor4all_tcicore::{Matrix, from_vec2d, matrix};

let m = from_vec2d(vec![
    vec![1.0_f64, 2.0],
    vec![3.0, 4.0],
]);
assert_eq!(m.nrows(), 2);
assert_eq!(m.ncols(), 2);
assert_eq!(m[[0, 1]], 2.0);
assert_eq!(m[[1, 0]], 3.0);

Structs

Matrix

A dense 2D matrix in row-major layout.

Traits

BlasMul

BLAS-backed matrix multiplication dispatch.

Functions

a_inv_times_b

Calculates A^{-1} * B using Gaussian elimination.

a_times_b_inv

Calculates A * B^{-1} using Gaussian elimination.

append_col

Append a column to the right of a matrix.

append_row

Append a row to the bottom of a matrix.

dot

Dot product of two vectors.

eye

Create an n x n identity matrix.

from_vec2d

Create a matrix from a 2D vector (row-major).

get_col

Get a column as a vector.

get_row

Get a row as a vector.

mat_mul

Matrix multiplication: A * B.

ncols

Get number of columns.

nrows

Get number of rows.

random_subset

Select a random subset of up to n elements from a slice.

set_diff

Set difference: elements in set that are not in exclude.

submatrix

Get a submatrix by selecting specific rows and columns.

submatrix_argmax

Find the position and value of the maximum absolute value in a submatrix.

swap_cols

Swap two columns in a matrix in-place.

swap_rows

Swap two rows in a matrix in-place.

transpose

Transpose the matrix.

zeros

Create a zeros matrix with given dimensions.