Enum DistanceMetric 

pub enum DistanceMetric {
    Cosine,
    L2,
    L2Squared,
    InnerProduct,
    Manhattan,
}

Distance metric types

Variants

Cosine

Cosine distance (1 - cosine similarity)

L2

L2 (Euclidean) distance

L2Squared

L2 squared (faster, avoids sqrt)

InnerProduct

Inner product (dot product)

Manhattan

Manhattan (L1) distance - scalar fallback

Implementations

impl DistanceMetric

pub fn compute(&self, a: &[f32], b: &[f32]) -> f32

Compute distance between two vectors

pub fn to_similarity(&self, distance: f32) -> f32

Convert distance to similarity (for ranking)

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