Hi there,
Take the data of columbus(spdep) as an example. Say i is one of the
polygons, and j represents its neighbours. How to get the vlues of
sum(Wij*Xj)? Wij means the weights, which can be get by
nb2listw$weights.
Say Xj to be columbus$PLUMB. The problem is how to get the right values
of columbus$PLUMB for the corresponding neighbours, so i can calculate the
"sum(Wij*Xj)"? See the following example.
example(columbus);coords <- coordinates(columbus)
nbs <- dnearneigh(coords,0,4)
nbslistw<-nb2listw(nbs, style="B")
#nbslistw$neighbours; nbslistw$weights
I can not figure it out. Anybody can give me some suggestions?
Thanks.
--
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Jane Chang
Queen's
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