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I think they use RMSE because it's easy, not because it's ideal. Bellkor, a participating team in Netflix challenge, discussed this in their paper describing th
by FiReaNG3L 18y ago
I think they use RMSE because it's easy, not because it's ideal. Bellkor, a participating team in Netflix challenge, discussed this in their paper describing their method who won the progress prize; they calculated whether minute differences in RMSE improved the quality of top10 results; it did pretty significantly.
- wheels 18y agoJust fished it out -- paper is here for the curious: http://public.research.att.com/~volinsky/netflix/RecSys08tutorial.pdf http://public.research.att.com/~volinsky/netflix/RecSys08tut... It's one, amusingly, that I'd skipped because it seemed to be less technical. :-) Good stuff.