Function pdist 

pub fn pdist<T, F>(
    x: &ArrayBase<OwnedRepr<T>, Dim<[usize; 2]>>,
    metric: F,
) -> ArrayBase<OwnedRepr<T>, Dim<[usize; 2]>>
where
    T: Float + Debug,
    F: Fn(&[T], &[T]) -> T,

Compute a distance matrix between two sets of points

Arguments

• x_a - First set of points
• xb - Second set of points
• metric - Distance metric to use

Returns

• Distance matrix with shape (x_a.nrows(), xb.nrows())

Examples

use scirs2_spatial::distance::{pdist, euclidean};
use scirs2_core::ndarray::array;

let points = array![[0.0, 0.0], [1.0, 0.0], [0.0, 1.0]];
let dist_matrix = pdist(&points, euclidean);

assert_eq!(dist_matrix.shape(), &[3, 3]);
assert!((dist_matrix[(0, 1)] - 1.0f64).abs() < 1e-6);
assert!((dist_matrix[(0, 2)] - 1.0f64).abs() < 1e-6);
assert!((dist_matrix[(1, 2)] - std::f64::consts::SQRT_2).abs() < 1e-6);