[R] How to draw a shade overlapping of three circles (or other shapes) with certain areas?

Carl Witthoft carl at witthoft.com
Fri Nov 29 21:16:06 CET 2013

Pardon the pedantry, but doyou know what a "Venn Diagram" is?  Because there
are two or three

packages at CRAN which will generate Venn diagrams for you given exactly
that sort of source data.

Yi.Zou wrote
> Hi all, 
> I am thinking of making a graph with three dataset A,B,C with shared
> common “area” with each other. i.e. shade overlapping of three circles (or
> other shapes such as ellipses or ploygon). 
> My data are like this:
> A: 20
> B: 15
> C: 15
> A&B: 10
> A&C: 12
> B&C: 8
> A&B&C:4
> It should make sure that each area of the circle (or other shape) can
> reflect the proportion of the number (I can transfer the number to
> proportion of course). 
> Anyone can help me? Many thanks!!

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