pairdist

From spatstat v1.4-5 by Adrian Baddeley

Pairwise distances

Computes the matrix of distances between all pairs of points in a point pattern.

Keywords: spatial

Usage

pairdist(x, y=NULL, method="C")

Arguments

x,y: Arguments specifying the $x$ and $y$ coordinates of a set of points. Typically x and y would be numeric vectors of equal length. Alternatively y may be omitted and x may be a point patter
method: String specifying which method of calculation to use. Values are "C" and "interpreted".

Details

This function computes the Euclidean distances between all pairs of points, and returns the matrix of distances.

If method = "interpreted" then the distances are computed using interpreted R code only. If method="C" then C code is used. The C code is marginally faster.

Value

A square matrix whose [i,j] entry is the distance between the points numbered i and j.

Examples

x <- runif(100)
   y <- runif(100)
   d <- pairdist(x, y)
   data(cells)
   d <- pairdist(cells)

Documentation reproduced from package spatstat, version 1.4-5, License: GPL version 2 or newer

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