compute_nearest_neighbor_distances {GeoThinneR} | R Documentation |
Compute Nearest Neighbor Distances
Description
Calculates nearest neighbor distances using geodesic or Euclidean distance.
Usage
compute_nearest_neighbor_distances(
coordinates,
distance = "haversine",
R = 6371
)
Arguments
coordinates |
A matrix of coordinates with two columns. |
distance |
A character string: "haversine" (default) or "euclidean". |
R |
Radius of the Earth in kilometers. Default is 6371. |
Value
A numeric vector of nearest neighbor distances, in meters (haversine) or in map units (euclidean).
Examples
# Example with geographic (longitude/latitude) coordinates
set.seed(123)
coords_geo <- matrix(cbind(runif(10, -10, 10), runif(10, 40, 50)), ncol = 2)
nnd_haversine <- compute_nearest_neighbor_distances(coords_geo, distance = "haversine")
print(round(nnd_haversine, 2)) # in km
# Example with projected coordinates (Euclidean)
coords_proj <- matrix(runif(20), ncol = 2) * 100 # e.g., meters or map units
nnd_euclidean <- compute_nearest_neighbor_distances(coords_proj, distance = "euclidean")
print(round(nnd_euclidean, 2))
[Package GeoThinneR version 2.0.0 Index]