Struct BallTree

pub struct BallTree;

Implementation of ball tree, a space partitioning data structure that partitions its points into nested hyperspheres called “balls”. It performs spatial queries in O(k * logN) time, where k is the number of points returned by the query. Calling from_batch returns a BallTreeIndex.

More details can be found here. This implementation is based off of the ball_tree crate.

Implementations

impl BallTree

pub fn new() -> Self

Creates an instance of BallTree

Trait Implementations

impl Clone for BallTree

fn clone(&self) -> BallTree

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for BallTree

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

Formats the value using the given formatter.

impl Default for BallTree

fn default() -> BallTree

Returns the “default value” for a type.

impl NearestNeighbour for BallTree

fn from_batch_with_leaf_size<'a, F: Float, DT: Data<Elem = F>, D: 'a + Distance<F>>( &self, batch: &'a ArrayBase<DT, Ix2>, leaf_size: usize, dist_fn: D, ) -> Result<Box<dyn Send + Sync + NearestNeighbourIndex<F> + 'a>, BuildError>

Builds a spatial index using a MxN two-dimensional array representing M points with N dimensions. Also takes leaf_size, which specifies the number of elements in the leaf nodes of tree-like index structures.

fn from_batch<'a, F: Float, DT: Data<Elem = F>, D: 'a + Distance<F>>( &self, batch: &'a ArrayBase<DT, Ix2>, dist_fn: D, ) -> Result<Box<dyn Send + Sync + NearestNeighbourIndex<F> + 'a>, BuildError>

Builds a spatial index using a default leaf size. See from_batch_with_leaf_size for more information.

impl PartialEq for BallTree

fn eq(&self, other: &BallTree) -> 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 Eq for BallTree

impl StructuralPartialEq for BallTree