[R] spatial overlap of datasets

[Barry Rowlingson]

Barry Rowlingson wrote:

> If any of the points of A fall inside B or vice versa then the convex 
> hulls overlap.

Pah, I'm wrong. View this with a fixed-width font:

      2    1   2

      1        1

      2    1   2

  convex hull of 1 and 2 overlap, yet no points of either are inside the 
other...

  thought that was too easy...

  Barry