ALS iteratively computes updates of left/right factors in an alternating fashion. The script runs "max_iter*2" iterations because we conservatively count a full update of both factors as an iteration. However, a jira/fix for improving the script documentation is certainly useful.
Regards, Matthias From: Luciano Resende <luckbr1...@gmail.com> To: dev@systemml.incubator.apache.org Date: 05/06/2016 08:41 PM Subject: ALS Algorithm I was playing with the ALS algorithm (scripts/algorithms/ALS-CG.dml) and was trying to update it to track overall losses, but I was always getting IndexOutOfBounds. After some investigation I noticed that we define max_iter but the code is actually as.integer(it/2) < max_iter which always make it runs max_iter * 2. Is there any reason for this behavior ? Otherwise let me know and I can create a jira/fix. Thanks -- Luciano Resende http://twitter.com/lresende1975 http://lresende.blogspot.com/
