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https://issues.apache.org/jira/browse/SPARK-15660?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Sean Owen resolved SPARK-15660.
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Resolution: Fixed
Fix Version/s: 2.1.0
Issue resolved by pull request 13403
[https://github.com/apache/spark/pull/13403]
> Update RDD `variance/stdev` description and add popVariance/popStdev
> --------------------------------------------------------------------
>
> Key: SPARK-15660
> URL: https://issues.apache.org/jira/browse/SPARK-15660
> Project: Spark
> Issue Type: Improvement
> Components: Spark Core
> Reporter: Dongjoon Hyun
> Priority: Minor
> Fix For: 2.1.0
>
>
> In Spark-11490, `variance/stdev` are redefined as the sample variance/stdev
> instead of population ones. This PR updates the comments to prevent users
> from misunderstanding. This will update the following API docs.
> -
> http://spark.apache.org/docs/2.0.0-preview/api/scala/index.html#org.apache.spark.api.java.JavaDoubleRDD
> -
> http://spark.apache.org/docs/2.0.0-preview/api/scala/index.html#org.apache.spark.rdd.DoubleRDDFunctions
> -
> http://spark.apache.org/docs/2.0.0-preview/api/scala/index.html#org.apache.spark.util.StatCounter
> Also, this PR adds them popVariance and popStdev functions clearly.
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