Re: Venn diagrams?
- To: mathgroup at smc.vnet.net
- Subject: [mg118310] Re: Venn diagrams?
- From: DrMajorBob <btreat1 at austin.rr.com>
- Date: Thu, 21 Apr 2011 03:11:12 -0400 (EDT)
Specifying two-way overlaps for three circles requires solving three pairwise problems along the lines already shown, then using center-to-center distances to determine a triangle on which the centers must lie. That arrangement determines the intersection of all three circles (if any), which is not true for real-world counting problems. Hence proportional diagrams, in general, cannot be limited to circles. Bobby On Wed, 20 Apr 2011 03:29:17 -0500, dantimatter <google at dantimatter.com> wrote: > Thanks DrMajorBob, Murray, and Bob Hanlon! To the Bobs especially: > your math and coding chops are most impressive. :) > > Any thoughts on extensions to three sets? At first I had hoped that it > would be straight-forward, but after fiddling a bit myself I'm not so > sure. > > I'm kinda surprised that Mathematica doesn't have this as a built-in > function .... > > Cheers > dan > -- DrMajorBob at yahoo.com