Enum DistanceMetric 

pub enum DistanceMetric {
    Euclidean,
    Cosine,
    DotProduct,
    Manhattan,
    Chebyshev,
}

Distance metric for comparing vectors.

Variants

Euclidean

Euclidean (L2) distance.

Cosine

Cosine distance (1 - cosine similarity).

DotProduct

Dot product (negative, for max similarity).

Manhattan

Manhattan (L1) distance - sum of absolute differences.

Chebyshev

Chebyshev (L∞) distance - maximum absolute difference.

Implementations

impl DistanceMetric

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

Calculate the distance between two vectors using this metric.

pub fn calculate_with_norms( &self, a: &[f32], b: &[f32], norm_a: f32, norm_b: f32, ) -> f32

Calculate distance using cached norms (more efficient for repeated queries).

Note: Norms are only used for Cosine distance. For other metrics, the norms are ignored and the standard calculation is performed.

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<'de> Deserialize<'de> for DistanceMetric

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl From<DistanceMetric> for DistanceMetricSerde

fn from(metric: DistanceMetric) -> Self

Converts to this type from the input type.

impl From<DistanceMetricSerde> for DistanceMetric

fn from(metric: DistanceMetricSerde) -> Self

Converts to this type from the input type.

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 Serialize for DistanceMetric

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl Copy for DistanceMetric

impl Eq for DistanceMetric

impl StructuralPartialEq for DistanceMetric