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 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.
Value
A symmetric matrix.
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 Rcode. The Rcode is
much slower, but is provided for checking purposes.