ALS int-String reverse ID mapping conflates user and item IDs

Question

ALS int-String reverse ID mapping conflates user and item IDs

srowen opened this issue 8 years ago · comments

ALSUpdate maintains a reverse mapping from ints used in the ALS algorithm to IDs. However it mixes user and item IDs in this mapping making it possible for a user ID to suddenly be mapped back to an item ID. Bad.

Sean Owen · Answer 1 · Mon Sep 12 2016 23:43:01 GMT+0800 (China Standard Time)

Fixed, at least, the problem of overlapping user/item IDs.