[R-sig-Geo] Fwd: Divide Voronoi cell using azimuth in R

[Zhang Jiaqiang]

Hello All,

Here is my code to generate some sample data for my question. As well as a
ggplot picture of voronoi.

What I want to do is divide each voronoi cell(the polygon in the center
which has closure edge ) into three cells(sectors).


​> head(data)

  site      lng      lat sector azimuth kpiA
1    a 103.8504 1.315139     a1       0   10
2    a 103.8504 1.315139     a2     120   20
3    a 103.8504 1.315139     a3     240   30
4    b 103.8481 1.321613     b1      50   40
5    b 103.8481 1.321613     b2     190   50
6    b 103.8481 1.321613     b3     320   60
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