Struct CsrMatrix 

pub struct CsrMatrix {
    pub n_rows: usize,
    pub n_cols: usize,
    pub row_ptr: Vec<usize>,
    pub col_idx: Vec<usize>,
    pub values: Vec<f64>,
}

Compressed Sparse Row (CSR) matrix stored as plain f64 arrays.

Fields

n_rows: usize

n_cols: usize

row_ptr: Vec<usize>

Row start indices, length n_rows + 1.

col_idx: Vec<usize>

Column indices of non-zeros.

values: Vec<f64>

Non-zero values.

Implementations

impl CsrMatrix

pub fn new(n_rows: usize, n_cols: usize) -> Self

Create an empty (all-zero) CSR matrix.

pub fn from_dense(m: &[Vec<f64>]) -> Self

Build from a dense row-major matrix (rows of length n_cols).

pub fn nnz(&self) -> usize

Number of stored non-zeros.

pub fn spmv(&self, x: &[f64]) -> Vec<f64>

Sparse matrix–vector product y = A * x.

pub fn get(&self, row: usize, col: usize) -> f64

Get the value at (row, col), returning 0.0 if not stored.

pub fn transpose(&self) -> CsrMatrix

Return A^T as a new CsrMatrix.

pub fn add(&self, other: &CsrMatrix) -> CsrMatrix

Add two CSR matrices of identical shape.

pub fn scale(&self, s: f64) -> CsrMatrix

Return a new matrix with every value multiplied by s.