Hi Rolf,

Thank you very much,  I just have one other question, do I need to change
the data frame into ppp format?  I've tried using as.ppp but get the
following error message:
Error: x,y coords given but no window specified

Best,

Monaly.


On Thu, Apr 3, 2014 at 9:23 PM, Rolf Turner <r.turner@auckland.ac.nz> wrote:

> 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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