Github user felixcheung commented on a diff in the pull request:
https://github.com/apache/spark/pull/11336#discussion_r82907977
--- Diff: R/pkg/R/DataFrame.R ---
@@ -1168,12 +1179,14 @@ setMethod("take",
#' Head
#'
-#' Return the first \code{num} rows of a SparkDataFrame as a R data.frame.
If \code{num} is not
-#' specified, then head() returns the first 6 rows as with R data.frame.
+#' Return the first elements of a dataset. If \code{x} is a
SparkDataFrame, its first
+#' rows will be returned as a data.frame. If the dataset is a
\code{Column}, its first
+#' elements will be returned as a vector. The number of elements to be
returned
+#' is given by parameter \code{num}. Default value for \code{num} is 6.
#'
-#' @param x a SparkDataFrame.
-#' @param num the number of rows to return. Default is 6.
-#' @return A data.frame.
+#' @param x A SparkDataFrame or Column
--- End diff --
for something like this the convention we have is to add the @param in
generics.R - you can see other examples there
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