Dear Lyon, This is a lovely visualisation.
Rafal On 17 Aug 2013, at 06:44, Anuj Kumar <[email protected]> wrote: Hi Lyon, This is cool; specifically, the lineage part where you can see how the values were calculated. Thanks for sharing. - Anuj On Sat, Aug 17, 2013 at 8:51 AM, B Lyon <[email protected]> wrote: > As part of trying to get a better grip on recommenders, I have started a > simple interactive visualization that begins with the raw data of user-item > interactions and goes all the way to being able to twiddle the interactions > in a test user vector to see the impact on recommended items. This is for > simple "user interacted with an item" case rather than numerical > preferences for items. The goal is to show the intermediate pieces and how > they fit together via popup text on mouseovers and dynamic highlighting of > the related pieces. I am of course interested in feedback as I keep > tweaking on it - not sure I got all the terminology quite right yet, for > example, and might have missed some other things I need to know about. > Note that this material is covered in Chapter 6.2 in MIA in the discussion > on distributed recommenders. > > It's on googledrive here (very much a work-in-progress): > > https://googledrive.com/host/0B2GQktu-wcTiWHRwZFJacjlqODA/ > > (apologies to small resolution screens) > > This is based only on the co-occurrence matrix, rather than including the > other similarity measures, although in working through this, it seems that > the other ones can just be interpreted as having alternative definitions of > what "*" means in matrix multiplication of A^T*A, where A is the user-item > matrix... and as an aside to me begs the interesting question of [purely > hypotheticall?] situations where LLR and co-occurrence are at odds with > each other in making recommendations, as co-occurrence seems to be just > using the "k11" term that is part of the LLR calculation. > > My goal (at the moment at least) is to eventually continue this for the > solr-recommender project that started as few weeks ago, where we have the > additional cross-matrix, as well as a kind of regrouping of pieces for > solr. > > > -- > BF Lyon > http://www.nowherenearithaca.com >
