Groups > comp.soft-sys.math.mathematica > #1809

Re: Venn diagrams?

From	DrMajorBob <btreat1@austin.rr.com>
Newsgroups	comp.soft-sys.math.mathematica
Subject	Re: Venn diagrams?
Date	2011-04-21 07:11 +0000
Organization	Steven M. Christensen and Associates, Inc and MathTensor, Inc.
Message-ID	<ioola8$bp1$1@smc.vnet.net> (permalink)

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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@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@yahoo.com

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Re: Venn diagrams? DrMajorBob <btreat1@austin.rr.com> - 2011-04-21 07:11 +0000

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