spdep (version 0.2-14)

plot.nb: Plot a neighbours list

Description

A function to plot a neighbours list given point coordinates to represent the region in two dimensions.

Usage

plot.nb(x, coords, col="black", points=TRUE, add=FALSE, arrows=FALSE, length=0.1, ...)

Arguments

x

an object of class nb

coords

matrix of region point coordinates

col

plotting colour

points

(logical) add points to plot

add

(logical) add to existing plot

arrows

(logical) draw arrowheads for asymmetric neighbours

length

length in plot inches of arrow heads drawn for asymmetric neighbours lists

...

further graphical parameters as in par(..)

See Also

summary.nb

Examples

data(columbus)
plot(col.gal.nb, coords)
title(main="GAL order 1 links with first nearest neighbours in red")
col.knn <- knearneigh(coords, k=1)
plot(knn2nb(col.knn), coords, add=TRUE, col="red", length=0.08)