Struct SparseMatrix 

pub struct SparseMatrix {
    pub rows: usize,
    pub cols: usize,
    pub row_ptr: Vec<usize>,
    pub col_indices: Vec<usize>,
    pub values: Vec<f64>,
}

A sparse matrix stored in CSR (Compressed Sparse Row) format.

Fields

rows: usize

Number of rows.

cols: usize

Number of columns.

row_ptr: Vec<usize>

Row pointers: row i has non-zeros at col_indices[row_ptr[i]..row_ptr[i+1]].

col_indices: Vec<usize>

Column indices of non-zero entries.

values: Vec<f64>

Values of non-zero entries.

Implementations

impl SparseMatrix

pub fn new(rows: usize, cols: usize) -> Self

Create an empty sparse matrix.

pub fn from_coo( rows: usize, cols: usize, entries: &[(usize, usize, f64)], ) -> Self

Build from coordinate list (row, col, val). Entries must be sorted by row.

pub fn nnz(&self) -> usize

Number of non-zero entries.

pub fn get(&self, r: usize, c: usize) -> f64

Get element (O(nnz per row) lookup).

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

Sparse matrix-vector multiply: y = A * x.

pub fn transpose(&self) -> SparseMatrix

Transpose of the sparse matrix.

pub fn norm_sq(&self) -> f64

Frobenius norm squared.

Trait Implementations

impl Clone for SparseMatrix

fn clone(&self) -> SparseMatrix

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for SparseMatrix

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.