spatstat (version 1.55-0)

pairdist.lpp: 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 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.

Value

A symmetric matrix, whose values are nonnegative numbers or infinity (Inf).

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.

If two points cannot be joined by a path, the distance between them is infinite (Inf).

See Also

lpp

Examples

# NOT RUN {
   X <- runiflpp(12, simplenet)
   pairdist(X)
# }