Apache Spark ALS collaborative filtering results. They don't make sense

Question

I wanted to try out Spark for collaborative filtering using MLlib as explained in this tutorial: https://databricks-training.s3.amazonaws.com/movie-recommendation-with-mllib.htm

Answer 1

Second what Vlad said, try correlation or Jaccard. I.e. ignore the rating numbers and just look at the binary "are these two movies together in a user's preference list or not". This was a game-changer for me when I was building my first recommender: http://tdunning.blogspot.com/2008/03/surprise-and-coincidence.html

Good luck