Function swap_cols 

pub fn swap_cols<T>(
    m: &mut Matrix<T>,
    a: usize,
    b: usize,
) -> Result<(), MatrixShapeError>

Swap two columns in a matrix in-place.

No-op if a == b, after validating that the index exists.

Errors

Returns MatrixShapeError::ColumnIndexOutOfBounds if either index is not less than m.ncols().

Examples

use tensor4all_tensorbackend::{from_vec2d, swap_cols};

let mut m = from_vec2d(vec![vec![1.0, 2.0], vec![3.0, 4.0]]);
swap_cols(&mut m, 0, 1).unwrap();
assert_eq!(m[[0, 0]], 2.0);
assert_eq!(m[[0, 1]], 1.0);