Struct BandedMatrix 

pub struct BandedMatrix {
    pub rows: usize,
    pub cols: usize,
    pub kl: usize,
    pub ku: usize,
    pub band: Vec<Vec<f64>>,
}

A banded matrix stored as an array of diagonals. Diagonals are indexed from -(rows-1) to +(cols-1); offset = k means superdiagonal k.

Fields

rows: usize

Number of rows.

cols: usize

Number of columns.

kl: usize

Lower bandwidth (number of sub-diagonals).

ku: usize

Upper bandwidth (number of super-diagonals).

band: Vec<Vec<f64>>

Storage: (kl + ku + 1) × cols, band[k][j] = A[j - ku + k][j].

Implementations

impl BandedMatrix

pub fn zero(rows: usize, cols: usize, kl: usize, ku: usize) -> Self

Create a zero banded matrix.

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

Get A[r][c] (returns 0 if outside band).

pub fn set(&mut self, r: usize, c: usize, v: f64)

Set A[r][c] (panics if outside band).

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

Matrix-vector multiply: y = A * x.

pub fn diagonal(&self) -> Vec<f64>

Diagonal entries (min(rows, cols) elements).

Trait Implementations

impl Clone for BandedMatrix

fn clone(&self) -> BandedMatrix

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for BandedMatrix

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

Formats the value using the given formatter.