Github user srowen commented on a diff in the pull request:
https://github.com/apache/spark/pull/13403#discussion_r68184371
--- Diff: core/src/main/scala/org/apache/spark/rdd/DoubleRDDFunctions.scala
---
@@ -74,6 +74,22 @@ class DoubleRDDFunctions(self: RDD[Double]) extends
Logging with Serializable {
}
/**
+ * Compute the population standard deviation of this RDD's elements.
+ * @since 2.1.0
--- End diff --
We need to use the Scala `@Since` annotation. Have a look how this is
annotated elsewhere in Scala. For Java, yeah, we only use the `@since` javadoc
tag because that's all that is available.
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