Github user felixcheung commented on a diff in the pull request:
https://github.com/apache/spark/pull/18114#discussion_r123311748
--- Diff: R/pkg/R/functions.R ---
@@ -2048,19 +2041,21 @@ setMethod("atan2", signature(y = "Column"),
column(jc)
})
-#' datediff
-#'
-#' Returns the number of days from \code{start} to \code{end}.
-#'
-#' @param x start Column to use.
-#' @param y end Column to use.
+#' @section Details:
+#' \code{datediff}: Returns the number of days from \code{y} to \code{x}.
#'
-#' @rdname datediff
-#' @name datediff
-#' @aliases datediff,Column-method
-#' @family date time functions
+#' @rdname column_datetime_diff_functions
+#' @aliases datediff datediff,Column-method
#' @export
-#' @examples \dontrun{datediff(df$c, x)}
+#' @examples
+#'
+#' \dontrun{
+#' set.seed(11)
--- End diff --
why need to set seed?
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