geoR: nearloc – R documentation

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nearloc

Near location to a point

Description

For a given set of points and locations identified by 2D coordinates this function finds the nearest location of each point

Usage

nearloc(points, locations, positions = FALSE)

Arguments

`points`	a matrix, data-frame or list with the 2D coordinates of a set of points for which you want to find the nearest location.
`locations`	a matrix, data-frame or list with the 2D coordinates of a set of locations.
`positions`	logical defining what to be returned. If `TRUE` the function returns the positions of the locations, otherwise the coordinates of the locations. Defaults to `FALSE`.

Value

If positions = FALSE the function returns a matrix, data-frame or list of the same type and size as the object provided in the argument points with the coordinates of the nearest locations.

If positions = FALSE the function returns a vector with the position of the nearest points in the locations object.

Author(s)

Paulo J. Ribeiro Jr. paulojus@leg.ufpr.br,
Peter J. Diggle p.diggle@lancaster.ac.uk.

Examples

set.seed(276)
gr <- expand.grid(seq(0,1, l=11), seq(0,1, l=11))
plot(gr, asp=1)
pts <- matrix(runif(10), nc=2)
points(pts, pch=19)
near <- nearloc(points=pts, locations=gr)
points(near, pch=19, col=2)
rownames(near)
nearloc(points=pts, locations=gr, pos=TRUE)

geoR

Analysis of Geostatistical Data

v1.8-1

GPL (>= 2)

Authors

Paulo J. Ribeiro Jr [aut, cre] <paulojus@ufpr.br>, Peter J. Diggle [aut, cre] <p.diggle@lancaster.ac.uk> Ole Christensen [ctb], Martin Schlather [ctb], Roger Bivand [ctb], Brian Ripley [ctb]

Initial release

2020-02-08