Dear all,

Having previously constructed by hand a (plain vanilla) contiguity
matrix among n regions, i.e. nxn with x_ij=1 if i and j are neighbours,
0 otherwise, we wondered if there is some convenient function for
transforming this into a neighbours list in order to carry on an
analysis in spdep. 

Else, if we are forced to do this by hand, it would be good to have a
precise spec sheet of "how an nb object should look like"... We didn't
find that in the spdep manual, maybe because it is easier than we think
:^).

Third way: we have a map of the regions of interest (Italy, NUTS3) in
the maps package, maybe there is some conversion tool towards "nb"?

Thank you for your help

Giovanni Millo
R&D Dept.
Assicurazioni Generali SpA
Trieste, Italy
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