# Venn Diagrams

October 2, 2003 | Todd Decker

6 Comment(s)

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.

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?

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)

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/

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.

Try Looking up venn 2(or any number you need) diagram-convert and click on “venn diagram converter/maker”

Discover the beauty of extreme Venn diagrams

http://www.newscientist.com/gallery/venn/1