pairdist.lpp {spatstat}R Documentation

Pairwise shortest-path distances between points on a linear network

Description

Given a pattern of points on a linear network, compute the matrix of distances between all pairs of points, measuring distance by the shortest path in the network.

Usage

## S3 method for class 'lpp'
pairdist(X, ..., method="C")

Arguments

X

Point pattern on linear network (object of class "lpp").

method

Optional string determining the method of calculation. Either "interpreted" or "C".

...

Ignored.

Details

Given a pattern of points on a linear network, this function computes the matrix of distances between all pairs of points, measuring distance by the shortest path in the network.

If method="C" the distances are computed using code in the C language. If method="interpreted" then the computation is performed using interpreted R code. The R code is much slower, but is provided for checking purposes.

Value

A symmetric matrix.

Author(s)

Ang Qi Wei aqw07398@hotmail.com and Adrian Baddeley Adrian.Baddeley@csiro.au http://www.maths.uwa.edu.au/~adrian/

See Also

lpp

Examples

   example(lpp)
   pairdist(X)

[Package spatstat version 1.25-3 Index]