[R-sig-Geo] N-order adjacency spatial weighted matrix from a polygonal shape file whithin R

[Juta Kawalerowicz]

Fabricio,

Have you checked nblag() in spdep? Follow the example in documentation 
and you will see that when you plot the neighbourhood list on spatial 
polygons the n-th order will be under col.lags[[n]]

then if you want both cumulate it with nblag_cumul() and convert to 
spatial weights with nb2listw()

Juta


On 28/01/2012 21:10, Fabricio Vasselai wrote:
> Dears,
>
> Although I am formaly new to this mailing list, for months I've been
> reading lots of threads here both on handling shape files and on making
> different adjacency spatial weighted matrices. But I still keep wondering
> and trying if is it possible to: 1) make n-order adjacency matrix from a
> poly shape file directly whithin R (queen or rook types); 2) customize the
> weights that each {1...n} order would be assigned.
>
> Of course it is possible to handle a first order adjacecy matrix trough the
> poly2nb command of spdep, but I did not realize yet how to properly do
> n-order adjacency without using GeoDa or ArcGIS.
> Maybe I am missing something of spdep in here?
>
> Best,
>
> Fabricio
>
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>
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