directlabels - utility.function - Positioning Method - outside.ahull

Calculate closest point on the alpha hull with size of the boxes, and put it outside that point.

outside.ahull <- function(d,...){
  edges.to.outside(ahull.points(d),visualcenter(d),...)
}
Please contact Toby Dylan Hocking if you are using directlabels or have ideas to contribute, thanks!
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