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Compute nearest neighbors for NNGP

Source: R/spatial_svc.R
compute_nngp_neighbors.Rd

Compute the k nearest neighbors for each observation using Euclidean distance. Returns in a format suitable for the NNGP likelihood.

Usage

compute_nngp_neighbors(coords, k)

Arguments

coords

N x d matrix of coordinates

k

Number of nearest neighbors

Value

List with:

  • nn_idx: N x k matrix of neighbor indices (0 for obs with fewer neighbors)

  • nn_dist: N x k matrix of distances to neighbors

  • nn_order: Ordering of observations for NNGP (by coordinate)