Hi Everybody

I have a SpatialPolygonsDataFrame with residential stands in a town. I have
created a SpatialPolygonsDataFrame with the street blocks by using poly2nb
in the spdep package. My sampling procedure (which was selected for ease of
implementation by an interviewer) is to take a random starting point in
each selected street block thereafter to interview respondents from every
5th house in a clockwise direction.
Is there a way in which one can "walk around the block" along the edge of a
group of bordering polygons, i.e get a non-repeating vector of the order of
these polygons from a starting point in a certain direction (say,
clockwise)?

thanks in advance
Christiaan

-- 
Christiaan Pauw
Nova Institute
www.nova.org.za

	[[alternative HTML version deleted]]

