Yes because the matrix A’A is not necessarily boolean. The actual value is ignored but it’s in the matrix so the colSums was not correct.
On Aug 6, 2014, at 4:54 PM, Dmitriy Lyubimov <dlie...@gmail.com> wrote: is this val bcastNumInteractions = drmBroadcast(drmI.numNonZeroElementsPerColumn) any different from just saying `drmI.colSums`? On Wed, Aug 6, 2014 at 4:49 PM, Dmitriy Lyubimov <dlie...@gmail.com> wrote: > > > > On Wed, Aug 6, 2014 at 4:21 PM, Dmitriy Lyubimov <dlie...@gmail.com> > wrote: > > I suppose in that context LLR is considered a distance (higher scores mean >> more `distant` items, co-occurring by chance only)? >> > > Self-correction on this one -- having given a quick look at llr paper > again, it looks like it is actually a similarity (higher scores meaning > more stable co-occurrences, i.e. it moves in the opposite direction of > p-value if it had been a classic test > > >> [1] http://ssc.io/wp-content/uploads/2012/06/rec11-schelter.pdf >> >> -d >> > >
