pub fn scan<D, T: Float>(m: &Matrix<T>, example: &[T], k: usize, df: D) -> Option<Vec<usize>> where D: Fn(&[T], &[T]) -> TSearch the k nearest neighbours for the given example.
Prefix searches with a type followed by a colon (e.g.
fn:) to restrict the search to a given type.
Accepted types are: fn, mod,
struct, enum,
trait, typedef (or
tdef).
Search functions by type signature (e.g.
vec -> usize)