Hi Sean, I¹m not sure what you mean by aggregate. The input of trainImplicit is an RDD of Ratings.
I find it odd that duplicate ratings would mess with ALS in the implicit case. It¹d be nice if it didn¹t. Thank you, On 15/02/2016 20:49, "Sean Owen" <so...@cloudera.com> wrote: >I believe you need to aggregate inputs per user-item in your call. I >am actually not sure what happens if you don't. I think it would >compute the factors twice and one would win, so yes I think it would >effectively be ignored. For implicit, that wouldn't work correctly, >so you do need to aggregate. > >On Mon, Feb 15, 2016 at 8:30 PM, Roberto Pagliari ><roberto.pagli...@asos.com> wrote: >> What happens when duplicate user/ratings are fed into ALS (the implicit >> version, specifically)? Are duplicates ignored? >> >> I¹m asking because that would save me a distinct. >> >> >> >> Thank you, >> --------------------------------------------------------------------- To unsubscribe, e-mail: user-unsubscr...@spark.apache.org For additional commands, e-mail: user-h...@spark.apache.org
