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I'm looking for a graphing program that handles Venn Diagrams exceptionally well. I would like to have diagrams built where the set sizes and overlap sizes are properly set based upon the data. Most Venn Diagrams I see have uniform circle and overlap sizes which of course do not properly convey the data.
-- Todd Decker (email)
I think the non-metrical aspect of Venn diagrams is a feature, not a bug. Consider the following three sets: A is the set of rational numbers, B is the integers, and C is the even integers. Clearly A contains B, which contains C. To say that in set-speak, B and C are subsets of A, and C is a subset of B. A Venn diagram can convey these relationships quite clearly, even though all three sets have an infinite number of members. If you're interested in showing quantitative relationships among groups, I suspect there's a better model to use. What kinds of things are you displaying?
-- Pierre Scalise (email)
New book on Venn diagrams, very favorable review in Nature (22 July 2004):
A.W.F.Edwards, Cogwheels of the mind: the story of Venn diagrams (2004)
-- Edward Tufte
Here's what you were looking for, perhaps. You just have to download and unzip it . The .exe file is a simple program that produces a quantitative Venn. It only has room for two sets unfortunately, but it's still very useful.
http://ma.water.usgs.gov/fhwa/VBVenn/
-- Nirupa Chaudhari (email)
Dear Todd,
please have a look at http://www.venndiagram.tk and http://www.cmbi.ru.nl/biovenn. These pages can generate proportional Venn diagrams, exactly what you are looking for.
regards, Tim Hulsen.
-- Tim Hulsen (email)
Try Looking up venn 2(or any number you need)\ diagram-convert and click on "venn diagram converter/maker"
-- William (email)
Discover the beauty of extreme Venn diagrams
http://www.newscientist.com/gallery/venn/1
-- David Cerruti (email)
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