spdep (version 0.1-10)

diffnb: Differences between neighbours lists

Description

The function finds differences between lists of neighbours, returning a nb neighbour list of those found

Usage

diffnb(x, y, verbose=TRUE)

Arguments

x

an object of class nb

y

an object of class nb

verbose

report regions with differences

Value

• A neighbours list with class nb

Examples

data(columbus)
knn1 <- knearneigh(coords, 1)
knn2 <- knearneigh(coords, 2)
nb1 <- knn2nb(knn1, row.names=rownames(columbus))
nb2 <- knn2nb(knn2, row.names=rownames(columbus))
diffs <- diffnb(nb2, nb1)
plotpolys(polys, bbs, border="grey")
plot(nb1, coords, add=TRUE)
plot(diffs, coords, add=TRUE, col="red", lty=2)
title(main="Plot of first (black) and second (red)
nearest neighbours")