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From "Joseph K. Bradley (JIRA)" <>
Subject [jira] [Commented] (SPARK-13857) Feature parity for ALS ML with MLLIB
Date Tue, 05 Apr 2016 20:44:25 GMT


Joseph K. Bradley commented on SPARK-13857:

Linking [SPARK-14412] which is the only other missing item I know of for ALS

> Feature parity for ALS ML with MLLIB
> ------------------------------------
>                 Key: SPARK-13857
>                 URL:
>             Project: Spark
>          Issue Type: Sub-task
>          Components: ML
>            Reporter: Nick Pentreath
>            Assignee: Nick Pentreath
> Currently {{mllib.recommendation.MatrixFactorizationModel}} has methods {{recommendProducts/recommendUsers}}
for recommending top K to a given user / item, as well as {{recommendProductsForUsers/recommendUsersForProducts}}
to recommend top K across all users/items.
> Additionally, SPARK-10802 is for adding the ability to do {{recommendProductsForUsers}}
for a subset of users (or vice versa).
> Look at exposing or porting (as appropriate) these methods to ALS in ML. 
> Investigate if efficiency can be improved at the same time (see SPARK-11968).

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