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Last data update: 2014.03.03

R: Spatial link distance measures

nbdists

R Documentation

Spatial link distance measures

Description

Given a list of spatial neighbour links (a neighbours list of object type nb), the function returns the Euclidean distances along the links in a list of the same form as the neighbours list. If longlat = TRUE, Great Circle distances are used.

Usage

nbdists(nb, coords, longlat = NULL)

Arguments

`nb`	an object of class `nb`
`coords`	matrix of point coordinates or a SpatialPoints object
`longlat`	TRUE if point coordinates are longitude-latitude decimal degrees, in which case distances are measured in kilometers; if coords is a SpatialPoints object, the value is taken from the object itself

Value

A list with class nbdist

Author(s)

Roger Bivand Roger.Bivand@nhh.no

Examples

example(columbus)
coords <- coordinates(columbus)
dlist <- nbdists(col.gal.nb, coords)
dlist <- lapply(dlist, function(x) 1/x)
stem(unlist(dlist))