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Posted to issues@spark.apache.org by "Erik Shilts (JIRA)" <ji...@apache.org> on 2015/08/26 15:05:45 UTC

[jira] [Created] (SPARK-10291) Add statsByKey method to compute StatCounters for each key in an RDD

Erik Shilts created SPARK-10291:
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             Summary: Add statsByKey method to compute StatCounters for each key in an RDD
                 Key: SPARK-10291
                 URL: https://issues.apache.org/jira/browse/SPARK-10291
             Project: Spark
          Issue Type: New Feature
          Components: PySpark
            Reporter: Erik Shilts
            Priority: Minor


A common task is to summarize numerical data for different groups. Having a `statsByKey` method would simplify this so the user would not have to write the aggregators for all the statistics or manage collecting by key and computing individual StatCounters.

This should be a straightforward addition to PySpark. I can look into adding to Scala and R if we want to maintain feature parity.



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