Re: [R] Matrix problem to extract animal associations

set.seed(1) (DFid <- data.frame( x = sample(1:20,10), y = sample(1:20,10), IDs = sapply(1:10,function(i) paste("ID",i,sep="" require(spdep) coordinates(DFid) <- ~x+y coords <- coordinates(DFid) dnn4 <- dnearneigh(DFid,0,4) summary(dnn4) plot(DFid) plot(dnn4,coords,add=T,col=2) nb2mat(dnn4,

[R] Matrix problem to extract animal associations

Dear List, I have been trying to extract associations from a matrix whereby individual locations are within a certain distance threshold from one another. I have been able to extract those individuals where there is 'no interaction' (i.e. where these individuals are not within a specified dista