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https://issues.apache.org/jira/browse/SPARK-19345?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Nick Pentreath reassigned SPARK-19345:
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Assignee: Nick Pentreath
> Add doc for "coldStartStrategy" usage in ALS
> --------------------------------------------
>
> Key: SPARK-19345
> URL: https://issues.apache.org/jira/browse/SPARK-19345
> Project: Spark
> Issue Type: Documentation
> Components: ML
> Reporter: Nick Pentreath
> Assignee: Nick Pentreath
>
> SPARK-14489 adds the ability to skip {{NaN}} predictions during
> {{ALS.transform}}. This can be useful in production scenarios but is
> particularly useful when trying to use the cross-validation classes with ALS,
> since in many cases the test set will have users/items that are not in the
> training set, leading to evaluation metrics that are all {{NaN}} and making
> cross-validation unusable.
> Add an explanation for the {{coldStartStrategy}} param to the ALS
> documentation, and add example code to illustrate the usage.
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