pairwise_dist: Calculate pairwise distances

In jelsema/RRSM: Methods for reduced rank spatial models

Description

Calculates pairwise distances between two sets of locations.

Usage

pairwise_dist(coords1, coords2 = coords1, dmethod = SpatialTools::dist2,
  ...)

Arguments

coords1	the coordinates of the first set of locations (dimension n1 x p).
coords2	the coordinates of the second set of locations (dimension n2 x p).
dmethod	the type of distance to compute, see Details.
...	space for additional arguments

Details

This function is a wrapper for existing distance functions. Argument dmethod selects from two types of distances to be computed:

• Euclidean distance: Computes distance using SpatialTools::dist2. For this method, identical(dmethod, SpatialTools::dist2) should return TRUE (default behavior).

• Great circle distance: Distance on a sphere/ellipsoid using geosphere. Argument dmethod should match one of the distance functions allowed for argument fun in geosphere::distm.

Value

A vector of matrix containing distances between the points.

Examples

coords1 <- cbind( c(1,1,2) , c(1,2,1) )
coords2 <- cbind( c(3,3) , c(2,3) )
pairwise_dist( coords1, coords2 )

jelsema/RRSM documentation built on May 19, 2019, 4:02 a.m.