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.

# S3 method for grouped_disk.frame
summarise(.data, ...)

# S3 method for grouped_disk.frame
summarize(.data, ...)

# S3 method for disk.frame
group_by(.data, ..., add = FALSE, .drop = dplyr::group_by_drop_default(.data))

# S3 method for disk.frame
summarize(.data, ...)

# S3 method for disk.frame
summarise(.data, ...)

Arguments

.data

a disk.frame

...

same as the dplyr::group_by

add

from dplyr

.drop

from dplyr

See also

hard_group_by