Enum Metric 

pub enum Metric {
    Cosine,
    Euclidean,
    DotProduct,
    Jaccard,
}

How distance is measured.

Variants

Cosine

Euclidean

DotProduct

Jaccard

Jaccard distance over sparse vectors (weighted: 1 - Σmin / Σmax).

Implementations

impl Metric

pub const ALL: [Self; 4]

pub fn name(self) -> &'static str

The name used by Cypher, the shell and the studio.

pub fn iri(self) -> String

pub fn parse(s: &str) -> Option<Self>

Parses a name (cosine, euclidean/l2, dot/dot_product, jaccard).

pub fn from_iri(iri: &str) -> Option<Self>

pub fn distance_fn(self) -> &'static str

The SQL distance function.

pub fn score_sql(self, d: &str) -> String

The similarity score of a distance d, as Neo4j defines it: higher is nearer.

pub fn score(self, d: f64) -> f64

Self::score_sql in Rust.

Trait Implementations

impl Clone for Metric

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for Metric

impl Debug for Metric

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

Formats the value using the given formatter.

impl Default for Metric

fn default() -> Self

Returns the “default value” for a type.

impl Eq for Metric

impl Hash for Metric

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Ord for Metric

fn cmp(&self, other: &Self) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

fn clamp_to<R>(self, range: R) -> Self

where Self: Sized, R: ClampBounds<Self>,

🔬This is a nightly-only experimental API. (clamp_to)

Restrict a value to a certain range.

impl PartialEq for Metric

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

Equality operator ==.

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

Inequality operator !=.

impl PartialOrd for Metric

fn partial_cmp(&self, other: &Self) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

Tests less than (for self and other) and is used by the < operator.

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

Tests less than or equal to (for self and other) and is used by the <= operator.

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

Tests greater than (for self and other) and is used by the > operator.

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

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl StructuralPartialEq for Metric