Github user felixcheung commented on a diff in the pull request: https://github.com/apache/spark/pull/14705#discussion_r75424138 --- Diff: R/pkg/R/functions.R --- @@ -3115,6 +3166,11 @@ setMethod("dense_rank", #' #' This is equivalent to the LAG function in SQL. #' +#' @param x the column as a character string or a Column to compute on. +#' @param offset the number of rows back from the current row from which to obtain a value. +#' If not specified, the default is 1. +#' @param defaultValue default to use when the offset row does not exist. +#' @param ... further arguments to be passed to or from other methods. --- End diff -- should this be `@param ... currently not used.`
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