Struct CosineDistance 

pub struct CosineDistance;

Cosine similarity-based pseudo-distance on ℝⁿ.

d_cos(x, y) = 1 − cos(θ) = 1 − (⟨x,y⟩ / (‖x‖₂ · ‖y‖₂))

Note: this is not a true metric (triangle inequality may fail), but it is widely used in information retrieval and machine-learning contexts.

Implementations

impl CosineDistance

pub fn similarity(a: &[f64], b: &[f64]) -> f64

Compute cosine similarity between two vectors.

pub fn distance(a: &[f64], b: &[f64]) -> f64

Compute cosine distance: 1 − similarity(a, b).

Trait Implementations

impl Clone for CosineDistance

fn clone(&self) -> CosineDistance

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for CosineDistance

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

Formats the value using the given formatter.

impl Default for CosineDistance

fn default() -> CosineDistance

Returns the “default value” for a type.

impl Copy for CosineDistance