[1] http://bugra.github.io/work/notes/2014-04-19/alternating-least-squares-method-for-collaborative-filtering/ http://bugra.github.io/work/notes/2014-04-19/alte

[1] http://bugra.github.io/work/notes/2014-04-19/alternating-least-squares-method-for-collaborative-filtering/ http://bugra.github.io/work/notes/2014-04-19/alternating-lea... This looks like a good introduction to ALS, albeit Python/Pandas centric.