Github user davies commented on a diff in the pull request:
https://github.com/apache/spark/pull/6297#discussion_r39227939
--- Diff: sql/core/src/main/scala/org/apache/spark/sql/functions.scala ---
@@ -295,6 +295,60 @@ object functions {
def min(columnName: String): Column = min(Column(columnName))
/**
+ * Aggregate function: returns the unbiased sample standard deviation
+ * of the expression in a group.
+ *
+ * @group agg_funcs
+ * @since 1.6.0
+ */
+ def stddev(e: Column): Column = Stddev(e.expr)
+
+ /**
+ * Aggregate function: returns the unbiased sample standard deviation
+ * of the column in a group.
+ *
+ * @group agg_funcs
+ * @since 1.6.0
+ */
+ def stddev(columnName: String): Column = stddev(Column(columnName))
--- End diff --
We may don't want this one anymore.
---
If your project is set up for it, you can reply to this email and have your
reply appear on GitHub as well. If your project does not have this feature
enabled and wishes so, or if the feature is enabled but not working, please
contact infrastructure at [email protected] or file a JIRA ticket
with INFRA.
---
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
