[R-sig-Geo] deldir package

[Roger Bivand]

On Tue, 26 Jun 2007, Kitty Lee wrote:

> I used deldir to generate voronoi but it seems that I can only specify 
> rectangular window for the rw option. Is there a way the system can take 
> in non-rectangular polygon as study area?

No, only rectangular windows are permitted. You could try a large window, 
and then code using templates in maptools to use the gpclib intersect 
function to cookie-cut the external polygons. At least deldir does permit 
polygon closure within the rectangle.

Roger

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-- 
Roger Bivand
Economic Geography Section, Department of Economics, Norwegian School of
Economics and Business Administration, Helleveien 30, N-5045 Bergen,
Norway. voice: +47 55 95 93 55; fax +47 55 95 95 43
e-mail: Roger.Bivand at nhh.no