[BioC] Venn Diagram of 4 Sets

[Thomas Hampton]

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