Github user iyerr3 commented on a diff in the pull request:
https://github.com/apache/incubator-madlib/pull/33#discussion_r57503961
--- Diff: src/ports/postgres/modules/elastic_net/elastic_net.sql_in ---
@@ -130,7 +130,13 @@ the dependent variable expression to the
<em>excluded</em> string.</DD>
<DD>BOOLEAN, default: TRUE. Whether to normalize the data. Setting this to
TRUE usually yields better results and faster convergence.</DD>
<DT>grouping_col (optional)</DT>
-<DD>TEXT, default: NULL. <em>Not currently implemented. Any non-NULL value
is ignored.</em> An expression list used to group the input dataset into
discrete groups, running one regression per group. Similar to the SQL <tt>GROUP
BY</tt> clause. When this value is NULL, no grouping is used and a single
result model is generated.</DD>
+<DD>TEXT, default: NULL.
+
+@note <em>Not currently implemented. Any non-NULL value is ignored.
+Grouping support will be added in a future release. </em>
+An expression list used to group the input dataset into discrete groups,
--- End diff --
Maybe we shouldn't say anything about the expression list, since grouping
isn't implemented yet.
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