search for: states_nb

...nd unzipped it into my working directory. Then in R (version 12.2.0 for ms-win32): library(rgdal) # Version: 0.6-28 library(spdep) # Version: 0.5-24 (loads sp: Version: 0.9-72) # read in the data states<-readOGR(".","s_01de10") summary(states) # now create a neighbors list states_nb<-poly2nb(states) # create a 0/1 matrix of the neighbors nb_mat<-nb2mat(states_nb,style="B",zero.policy=TRUE) # add names nms<-as.character(states$NAMES) # set the matrix names dimnames(nb_mat)<-list(nms,nms) # now see which states have no neighbors rowSums(nb_mat) # it turns...