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Posted to issues@spark.apache.org by "Sandeep Singh (JIRA)" <ji...@apache.org> on 2014/04/30 10:13:15 UTC

[jira] [Commented] (SPARK-1668) Add implicit preference as an option to examples/MovieLensALS

    [ https://issues.apache.org/jira/browse/SPARK-1668?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13985259#comment-13985259 ] 

Sandeep Singh commented on SPARK-1668:
--------------------------------------

https://github.com/apache/spark/pull/597

> Add implicit preference as an option to examples/MovieLensALS
> -------------------------------------------------------------
>
>                 Key: SPARK-1668
>                 URL: https://issues.apache.org/jira/browse/SPARK-1668
>             Project: Spark
>          Issue Type: New Feature
>          Components: MLlib
>            Reporter: Xiangrui Meng
>            Assignee: Sandeep Singh
>            Priority: Minor
>
> Add --implicitPrefs as an command-line option to the example app MovieLensALS under examples/. For evaluation, we should map ratings to range [0, 1] and compare it with predictions. It would be better if we add unobserved ratings (assuming negatives) to evaluation.



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