#' @export #' @importFrom dplyr add_count #' @rdname dplyr_verbs add_count.disk.frame <- create_chunk_mapper(dplyr::add_count) #' @export #' @importFrom dplyr add_tally #' @rdname dplyr_verbs add_tally.disk.frame <- create_chunk_mapper(dplyr::add_tally)

The disk.frame group by operation perform group WITHIN each chunk. This is often used for performance reasons. If the user wishes to perform group-by, they may choose to use the `hard_group_by` function which is expensive as it reorganizes the chunks by the shard key.

chunk_summarize(.data, ...)

chunk_summarise(.data, ...)

chunk_group_by(.data, ...)

chunk_ungroup(.data, ...)

Arguments

.data

a disk.frame

...

passed to dplyr::group_by

See also

hard_group_by group_by