Github user icexelloss commented on a diff in the pull request:
https://github.com/apache/spark/pull/20211#discussion_r161086349
--- Diff: python/pyspark/sql/group.py ---
@@ -233,6 +233,27 @@ def apply(self, udf):
| 2| 1.1094003924504583|
+---+-------------------+
+ Notes on grouping column:
--- End diff --
One thing probably needs a bit clarify that I am a little confused by the
doc of `gapply` here:
https://github.com/apache/spark/blob/master/R/pkg/R/DataFrame.R#L1626
In the output, there is a "Model" column:
https://github.com/apache/spark/blob/master/R/pkg/R/DataFrame.R#L1646
but it's not specified in the schema:
https://github.com/apache/spark/blob/master/R/pkg/R/DataFrame.R#L1631
Looks like it might be a mistake in the doc from the description of the
function, but I am not sure.
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