oracle aide

December 26, 2012

A Venn Pie (Using Venn pies to illustrate Bayes’ theorem)

The Bayes’ law is very easy to understand when it is explained visually. Venn diagrams are a very popular way to represent relations between sets in the Bayes’ theorem.

Unfortunately, Venn diagrams are inefficient in showing ratios.


The best kind of diagrams to show ratios are the pie charts.

Combining Venn and Pie – by allowing pie sectors to overlap – makes diagrams more descriptive and illustrations of Bayes’ theorem – more intuitive.



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