Preserves class when grouping decorated.
# S3 method for decorated
group_by(.data, ..., add = FALSE, .drop = group_by_drop_default(.data))A data frame, data frame extension (e.g. a tibble), or a lazy data frame (e.g. from dbplyr or dtplyr). See Methods, below, for more details.
In group_by(), variables or computations to group by.
In ungroup(), variables to remove from the grouping.
When FALSE, the default, group_by() will
override existing groups. To add to the existing groups, use
.add = TRUE.
This argument was previously called add, but that prevented
creating a new grouping variable called add, and conflicts with
our naming conventions.
Drop groups formed by factor levels that don't appear in the
data? The default is TRUE except when .data has been previously
grouped with .drop = FALSE. See group_by_drop_default() for details.
Other dplyr:
anti_join.decorated(),
arrange.decorated(),
filter.decorated(),
full_join.decorated(),
inner_join.decorated(),
left_join.decorated(),
mutate.decorated(),
right_join.decorated(),
select.decorated(),
semi_join.decorated(),
slice.decorated(),
summarise.decorated(),
summarize.decorated()