Trait MatrixRef

Source

pub trait MatrixRef<T> {
    // Required methods
    fn nrows(&self) -> usize;
    fn ncols(&self) -> usize;
    fn get(&self, row: usize, col: usize) -> &T;
    fn col_as_slice(&self, col: usize, row_start: usize) -> &[T];
}

Expand description

Read-only access to a matrix-like type.

This trait allows algorithms to operate generically over both fixed-size Matrix and future DynMatrix types.

§Example

use numeris::{Matrix, MatrixRef};

fn trace<T: numeris::Scalar>(m: &impl MatrixRef<T>) -> T {
    let mut sum = T::zero();
    let n = m.nrows().min(m.ncols());
    for i in 0..n {
        sum = sum + *m.get(i, i);
    }
    sum
}

let m = Matrix::new([[1.0, 2.0], [3.0, 4.0]]);
assert_eq!(trace(&m), 5.0);