Github user NarineK commented on a diff in the pull request:
https://github.com/apache/spark/pull/12836#discussion_r64804537
--- Diff: R/pkg/R/DataFrame.R ---
@@ -1268,6 +1268,82 @@ setMethod("dapplyCollect",
ldf
})
+#' gapply
+#'
+#' Apply a R function to each group of a DataFrame. The group is defined
by an input
+#' grouping column.
+#'
+#' @param x A SparkDataFrame
+#' @param func A function to be applied to each group partition specified
by grouping
--- End diff --
Yes, the key and the Dataframe with the grouping columns.
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