Determine the groupings of values as they would be presented in the venn diagram.
Usage
calculate.overlap(x)
Arguments
x
A list of vectors (e.g., integers, chars), with each component corresponding
to a separate circle in the Venn diagram
Value
Returns a list of lists which contain the values assigned to each of the areas of a venn diagram.
Details
This function mostly complements the venn.diagram() function for the case where users
want to know what values are grouped into the particular areas of the venn diagram.