Dear all,
My aim is to test the robustness of a regression that has a dummy for a set
of contiguous (rook) polygons.
I need to generate random sets of pseudo-regions, i.e. contiguous polygons
randomly selected, and then check if the regression results are robust.
I would like to create this pseudo regions, based on two criteria: similar
total area and similar shape of the original region.
Is there a function for that? Any guess on how to do it?
(For the similar shape, my first guess goes like this: get the lat/lon of
the  centroids of the original set of polygons, move them together randomly
and them select the polygons which contain the new set of points. Is there
a easier way?).
Thanks in advance!

Leo Monasterio
IPEA- Brazil

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