Enum DistanceMetric 

pub enum DistanceMetric {
    Cosine,
    Euclidean,
    DotProduct,
}

Distance metric used for nearest-neighbor comparisons.

Variants

Cosine

Cosine distance: 1 - cos(a, b). Range [0, 2]. 0 = identical direction.

Euclidean

Euclidean (L2) distance. Range [0, inf).

DotProduct

Negative dot product (so smaller = more similar). Range (-inf, inf).

Implementations

impl DistanceMetric

pub fn compute(&self, a: &ArrayView1<'_, f32>, b: &ArrayView1<'_, f32>) -> f32

Compute the distance between two vectors using this metric.

Trait Implementations

impl Clone for DistanceMetric

fn clone(&self) -> DistanceMetric

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for DistanceMetric

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

Formats the value using the given formatter.

impl PartialEq for DistanceMetric

fn eq(&self, other: &DistanceMetric) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Copy for DistanceMetric

impl Eq for DistanceMetric

impl StructuralPartialEq for DistanceMetric