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2009 Dec 04
1
multidimensional point.in.polygon??
...to do this would be to compute the convex hull (?chull) of the augmented set of points and test if the point belongs to it"; an approach I'd considered generalising to multiple points thus (pseudo R code)... ---------------- baseHull <- convhulln(baseSet) augHull <- convhulln(augSet) while (augHull != baseHull) { augSet <- augSet [-(augHull !%in% baseHull)] augHull <- convhulln(augSet) } -------------------- ... but this has that horrible loop including a convhulln! In the (real, typical) test data set I'm using for development baseSet is 5 colu...