Struct MultiVector 

pub struct MultiVector { /* private fields */ }

A multivector - multiple dense vectors per point (ColBERT-style) Each sub-vector typically represents a token embedding

Implementations

impl MultiVector

pub fn new(vectors: Vec<Vec<f32>>) -> Result<Self, &'static str>

Create a new multivector from a list of sub-vectors All sub-vectors must have the same dimension

pub fn from_single(vector: Vec<f32>) -> Result<Self, &'static str>

Create from a single dense vector (wraps it as a multivector with one sub-vector)

pub fn dim(&self) -> usize

Get the dimension of each sub-vector

pub fn len(&self) -> usize

Get the number of sub-vectors

pub fn is_empty(&self) -> bool

Check if empty

pub fn vectors(&self) -> &[Vec<f32>]

Get a reference to the sub-vectors

pub fn first(&self) -> Option<&Vec<f32>>

Get the first sub-vector (useful for backwards compatibility)

pub fn to_single_vector(&self) -> Vector

Convert to a single Vector (using first sub-vector) Used for backwards compatibility with non-multivector operations

pub fn max_sim(&self, other: &MultiVector) -> f32

Compute MaxSim score between two multivectors

For each sub-vector in self (query), find the maximum similarity with any sub-vector in other (document), then sum all maximums.

This is the ColBERT scoring algorithm.

pub fn max_sim_cosine(&self, other: &MultiVector) -> f32

Compute MaxSim with cosine similarity (normalized dot product)

pub fn max_sim_l2(&self, other: &MultiVector) -> f32

Compute MaxSim with negative L2 distance (for Euclidean)

Trait Implementations

impl Clone for MultiVector

fn clone(&self) -> MultiVector

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for MultiVector

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for MultiVector

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl From<MultiVector> for VectorData

fn from(mv: MultiVector) -> Self

Converts to this type from the input type.

impl PartialEq for MultiVector

fn eq(&self, other: &MultiVector) -> 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 MultiVector

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

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for MultiVector