[BioC] Venn Diagram of 4 Sets

[Thomas Girke]

To generate geometrically correct 4-way venn diagrams you want 
to use the ellipse version. However, some of our users prefer the circle
version because it is easier to navigate. Nevertheless, the latter should
only be used if one isn't interested in the 2 missing overlap sectors.
That's the only reason why the function provides options for both 
ellipses and circles. I hope the comment text on the web page points 
this out in a prominent enough manner to avoid confusions.  

Thomas

On Thu, May 14, 2009 at 02:04:24PM -0400, Thomas Hampton wrote:
> Thanks very much to Steffan and Thomas.
> 
> I have tried  gplots:venn and venndiagram()  and both work.
> 
> One question about Dr. Girke's solution  involving
> circles for a 4 way Venn.
> 
> Aren't there too few areas inside 4 overlapping circles  (13)
> to get the 15 areas you need for a 4 way?
> 
> Cheers,
> 
> Tom
> 
> On May 14, 2009, at 1:21 PM, Steffen Moeller wrote:
> 
> >The gplots in CRAN also offer 4- and 5-way diagrams.
> >Many greetings
> >Steffen
> >
> >Thomas Girke wrote:
> >>Here is a simple solution for plotting 4-way venn diagrams as
> >>circles or ellipses:
> >>http://faculty.ucr.edu/~tgirke/Documents/R_BioCond/ 
> >>R_BioCondManual.html#R_graphics_venn
> >>
> >>Thomas
> >>
> >>On Thu, May 14, 2009 at 09:12:59AM -0400, Thomas Hampton wrote:
> >>>This is an old thread that pops up now and then, but I don't see a
> >>>resolution.
> >>>
> >>>It is well known that limma's vennDiagram() function does a fine job
> >>>with
> >>>two or three sets, but not four.  I have four sets I'd like to
> >>>compare. Has
> >>>anyone solved this in a nice way?
> >>>
> >>>Thanks,
> >>>
> >>>Tom
> >>>
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>