[R-sig-Geo] Neighborhood matrix from poly2nb (spdep package)

[Roger Bivand]

On Fri, 4 Nov 2016, Maaz Gardezi wrote:

> Hi,
>
> I'm trying to extract the 'neighborhood matrix' from the poly2nb function.

No, it returns (see ?poly2nb):

A neighbours list with class ‘nb’. See ‘card’ for details of “nb” objects.

Look at ?nb2mat, but then you'll also be obliged to decide on the style= 
argument, or use ?nb2list first.

Making a "neigbourhood matrix" involves several steps, each of which 
should be taken consciously. Also maybe see vignette("nb") and 
vignette("nb_igraph").

Roger

>
> I can see the neighbors for each polygon, e.g. 1 has neighbors 2, 3, 5, 6.
>
> I try to convert this matrix into a data frame but get the error "cannot
> coerce class ""nb"" to a data.frame". Is there any way of doing this in the
> spdep package?
>
> Other possible ways?
>
> Regards,
>
> Maaz
>
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>
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-- 
Roger Bivand
Department of Economics, Norwegian School of Economics,
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