Why coocurrence code takes number of users as total interactions? shouldn't that be 1-norm of the co-occurrence matrix?
On Wed, Aug 6, 2014 at 4:21 PM, Dmitriy Lyubimov <dlie...@gmail.com> wrote: > So, compared to original paper [1], similarity is now hardcoded and always > LLR? Do we have any plans to parameterize that further? Is there any reason > to parameterize it? > > > Also, reading the paper, i am a bit wondering -- similarity and distance > are functions that usually are moving into different directions (i.e. > cosine similarity and angular distance) but in the paper distance scores > are also considered similarities? How's that? > > I suppose in that context LLR is considered a distance (higher scores mean > more `distant` items, co-occurring by chance only)? > > [1] http://ssc.io/wp-content/uploads/2012/06/rec11-schelter.pdf > > -d >
