Nearest neighbour distances as used by Ghat()
Calculate nearest neighbour distances as used by Ghat().
nndistG(pts)
pts |
A points data set |
Returns a list with components $dists and $neighs.
$dists[i] is the distance
to the nearest neighbour of point i in pts, and $neighs[i]
is the index
of the neighbour of point i.
Rowlingson, B. and Diggle, P. 1993 Splancs: spatial point pattern analysis code in S-Plus. Computers and Geosciences, 19, 627-655; the original sources can be accessed at: https://www.maths.lancs.ac.uk/~rowlings/Splancs/. See also Bivand, R. and Gebhardt, A. 2000 Implementing functions for spatial statistical analysis using the R language. Journal of Geographical Systems, 2, 307-317.
data(uganda) boxplot(nndistG(as.points(uganda))$dists) plot(ecdf(nndistG(as.points(uganda))$dists))
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