Hi everybody,
I am interested in a recommendation algorithm Andrew Ng mentions in his 
coursera course on ML.(Week 9) 
https://class.coursera.org/ml-004/lectureThe algorithm works with the ratings from users and calculates 'ingredients'-parameters the films are made up of in a backward-forward manner to impute the unknown ratings.
As I did not get a name for this algorithm in his lecture I was 
wondering if you knew it and could tell me if it was implemented in 
Crab.
Thank you very much and kind regards
Damian