perhaps something along the lines p(A and B) > p(notA and notB)?
On Wed, Aug 13, 2014 at 4:42 PM, Dmitriy Lyubimov <[email protected]> wrote: > Hello, > > i would be greatful for a hint for a following problem here in > cooccurrence analysis. It may be not most practical one but it appeared in > the test. > > The problem is that LLR tests for independence. As such, it would give > high scores for negatively correlated events too. E.g. say countA = 91, > countB=91, countA&B=1, total = 213 produces sky-high llr of 139.33. > However, in this situations these events avoid each other (something we are > not looking for) rather than highly likely to co-occur (somethng we are > looking for). > > Is there a quick test to filter out negatively co-occuring events? > > thanks. > -d >
