Debasish Das created SPARK-4231:
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             Summary: Add RankingMetrics to examples.MovieLensALS
                 Key: SPARK-4231
                 URL: https://issues.apache.org/jira/browse/SPARK-4231
             Project: Spark
          Issue Type: Improvement
          Components: Examples
    Affects Versions: 1.2.0
            Reporter: Debasish Das
             Fix For: 1.2.0


examples.MovieLensALS computes RMSE for movielens dataset but after addition of 
RankingMetrics and enhancements to ALS, it is critical to look at not only the 
RMSE but also measures like prec@k and MAP.

In this JIRA we added RMSE and MAP computation for examples.MovieLensALS and 
also added a flag that takes an input whether user/product recommendation is 
being validated.
 



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