Github user felixcheung commented on a diff in the pull request: https://github.com/apache/spark/pull/14705#discussion_r75424152 --- Diff: R/pkg/R/functions.R --- @@ -2766,6 +2776,10 @@ setMethod("window", signature(x = "Column"), #' NOTE: The position is not zero based, but 1 based index, returns 0 if substr #' could not be found in str. #' +#' @param substr a character string to be matched. +#' @param str a Column where matches are sought for each entry. +#' @param pos start position of search. +#' @param ... further arguments to be passed to or from other methods. --- End diff -- should this be `@param ... currently not used.`
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