> From: imirum_a...@hotmail.com > To: r-sig-...@r-project.org > Date: Sun, 20 Apr 2014 09:23:14 +0000 > Subject: [R-sig-Epi] problem with nb2listw( ) command > > > Dear all > I am using scottish lip cancer data, which contains the columns of observed, > expected, AFF(person at risk) and latitude and longitude. i use the commands > > > nc<-combine.data.shapefile(data=scotland,shp=shp,dbf=dbf) > ###CARBayes package > > W.nb<-poly2nb(nc=scotland,row.names=rownames(scotland)) ### spdep > package > > > W.nb > Out put is > > Neighbour > list object: > > > Number of > regions: 56 > > > Number of > nonzero links: 234 > > > Percentage > nonzero weights: 7.461735 > > > Average > number of links: 4.178571 > > > 3 regions > with no links: > > > 6554 6655 6756 > > > > col.W<-nb2listw(W.nb,style="B",zero.policy=TRUE) > > > > col.W > > > which gives out put > Error in > print.listw(list(style = "B", neighbours = list(c(5L, 9L, 19L : regions with > no neighbours found, use zero.policy=TRUEwhen i use the command > >moranI.test(Observed~AFF+offset(log(Expected)), > as(nc, "data.frame"), "negbin", 999, > > > listw=col.W, n=length(W.nb), S0=Szero(col.W) > ) > > > Moran's I test of > spatial autocorrelation > > > Type of boots.: parametric > > Model used when sampling: Negative > Binomial > > Number of simulations: 999 > Statistic: NA > p-value : NA > please help if any body has an idea. > > > > There were 50 or more warnings (use > warnings() to see the first 50) > > > > [[alternative HTML version deleted]] > > _______________________________________________ > r-sig-...@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-sig-epi [[alternative HTML version deleted]]
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