On 11/02/2011, at 9:56 AM, gianni lavaredo wrote:
Dear Researchers,
I have a points shapefile with wave shape. I wish to select only
the border
points to create a border owin with the same wave shape. I tryed to
use
convex.hull but the final shape is not the same. Some researchers
have some
suggestions?
If I understand your question correctly, what you should do is create
a data frame (say ``DF'') with columns "x" and "y" specifying the
coordinates of
the points on (the border of) your ``wave shape''. The points should
be listed
in the ***anticlockwise*** direction, and the last point should
***not*** repeat
the first. Then do
W <- owin(poly=DF)
HTH.
cheers,
Rolf Turner
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