count: Count observations by group

In hope-data-science/tidydt: Tidy Verbs for 'data.table'

Description

Analogous function for count and add_count in dplyr.

Usage

count_dt(data, ..., sort = TRUE, name = "n")

add_count_dt(data, ..., name = "n")

Arguments

data	data.table/data.frame data.frame will be automatically converted to data.table.
...	variables to group by.
sort	logical. If TRUE result will be sorted in desending order by resulting variable.
name	character. Name of resulting variable. Default uses "n".

Value

data.table

See Also

count

Examples

iris %>% count_dt(Species)
iris %>% count_dt(Species,name = "count")
iris %>% add_count_dt(Species)
iris %>% add_count_dt(Species,name = "N")

hope-data-science/tidydt documentation built on Feb. 21, 2020, 10:25 a.m.