nearest_neighbor_search {distances}

Nearest neighbor search

Description

nearest_neighbor_search searches for the k nearest neighbors of a set of query points.

Usage

nearest_neighbor_search(
  distances,
  k,
  query_indices = NULL,
  search_indices = NULL,
  radius = NULL
)

Arguments

distances

A distances object.

k

The number of neighbors to search for.

query_indices

An integer vector with point indices to query. If NULL, all data points in distances are queried.

search_indices

An integer vector with point indices to search among. If NULL, all data points in distances are searched over.

radius

Restrict the search to a fixed radius around each query. If fewer than k search points exist within this radius, no neighbors are reported (indicated by NA).

Value

A matrix with point indices for the nearest neighbors. Columns in this matrix indicate queries, and rows are ordered by distances from the query.