Talk:Rand index

From Wikipedia, the free encyclopedia

What is the n representing? Also, wouldn't it be easier as:

R=\frac{|X\cap Y|}{|X|}=\frac{|X\cap Y|}{|Y|}

, assuming their cardinalities are equal, |X| = |Y|? Or am I misinterpreting this article? because |X intersect Y| is the number of elements that are in both X and Y, and |X| is the total number of elements. EulerGamma 00:08, 7 September 2006 (UTC)

The article was a bit confusing because it didn't mention that it's pairs of elements you're looking at. It should make more sense now. -SpuriousQ 11:07, 9 December 2006 (UTC)