Hi !
I am currently working on a wombling (boundary detection) function and I
have come across a nag. Hopefully you will be able to give me a hand on
this.
Following is a small example to explain what I want to do using the
spdep package.
xy<-expand.grid(1:4,1:2)
nbobj<-cell2nb(4,2,"rook")
links<-listw2sn(nb2listw(nbobj))
links.new<-links[-c(4,6,15,17),]
nbobj.new<-sn2listw(links.new)$neighbours
plot(nbobj.new,xy)
"nbobj.new" has two separate groups of points links between each other.
Is there a way to automatically counts the number of independent
(non-linked) groups of sites ?
Thanks in advance !
Guillaume Blanchet
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