tidyfst (version 0.7.7)

count_dt: Count observations by group

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

# NOT RUN {
iris %>% count_dt(Species)
iris %>% count_dt(Species,name = "count")
iris %>% add_count_dt(Species)
iris %>% add_count_dt(Species,name = "N")

mtcars %>% count_dt(cyl,vs)
mtcars %>% add_count_dt(cyl,vs)

# }