On 04/04/14 01:16, Monaly Mistry wrote:
Hi,
If I have a data frame of the location of individuals (x and y coordinate),
how do I find the 5 nearest neighbours for each individual.
The nnwhich() function from the spatstat package will do this for you.
E.g.:
require(spatstat) # You need to have *installed* spatstat!
W <- ripras(ddd) # Where "ddd" is the name of your data frame.
X <- ppp(x=ddd[,1],y=ddd[,2],window=W)
n5 <- nnwhich(X,k=1:5)
cheers,
Rolf Turner
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