Github user rxin commented on a diff in the pull request:
https://github.com/apache/spark/pull/5799#discussion_r29405009
--- Diff: sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala ---
@@ -1414,4 +1415,25 @@ class DataFrame private[sql](
val jrdd = rdd.map(EvaluatePython.rowToArray(_,
fieldTypes)).toJavaRDD()
SerDeUtil.javaToPython(jrdd)
}
+
+
/////////////////////////////////////////////////////////////////////////////
+ // Statistic functions
+
/////////////////////////////////////////////////////////////////////////////
+
+ // scalastyle:off
+ object stat {
--- End diff --
take a look at how we implemented na.
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