Compute Neighbors Using Brute-Force — compute_neighbors

Computes neighbors for each point in a set of coordinates using a greedy approach. All pairwise distances are calculated to identify neighbors within a specified distance threshold.

Usage

compute_neighbors_brute(
  coordinates,
  thin_dist,
  distance = c("haversine", "euclidean"),
  R = 6371
)

Arguments

coordinates: A matrix of coordinates to thin, with two columns representing longitude and latitude.
thin_dist: A positive numeric value representing the thinning distance in kilometers.
distance: A character string specifying the distance metric to use `c("haversine", "euclidean")`.
R: A numeric value representing the radius of the Earth in kilometers. The default is 6371 km.

Value

A list where each element corresponds to a point and contains the indices of its neighbors.

Examples

set.seed(123)
coords <- matrix(runif(20, min = -180, max = 180), ncol = 2)

# Compute neighbors using brute fore
neighbors <- compute_neighbors_brute(coords, thin_dist = 10,)