Dear all,
A spdep  listw object has each unit and its neighboors. I am searching for
a way to go from this listw object to the list of the *neighboorhoods*  and
its member units.
Example:
Units: neighboors

A :B C
B: A
D: E
C: A
E: D

I want
Neighborhood I : A, B, C
Neighborhood II : D, E

Any ideas?
Thanks,
leo.

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