Dear All,
I am trying to choose k nearest neighbors in order to assign neighbors
based on the distance. This is just a preliminary approach to use moran
scatterplot to filter out the yield values that appear grossly discordant.
#### Choose K nearest points as neighbors
cords <- coordinates(canocrop.sp)
*spatial.knn <- knearneigh(coords, k=4)*
When I execute the last statement, the warning message is
Warning message:In library(package, lib.loc = lib.loc, character.only
= TRUE, logical.return = TRUE, :
there is no package called RANN
I proceed further as follows
## convert a 'knn' object returned by 'knearneigh' into a neighbor list of
class 'nb'
spatnnl<-knn2nb(spatial.knn)
## nearest distance based neighbors
spatdist<-max(unlist(nbdists(spatnnl,coords)))
summary(spatdist)
The result obtained is
Min. 1st Qu. Median Mean 3rd Qu. Max.
117.1 117.1 117.1 117.1 117.1 117.1
My worry is how come the summary statistics are the same. I guess the
distance is wrong due to error message above. Please what do I do to my
script to prevent the above error message.
Thanks
Moshood
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