topn: Select top (or bottom) n rows (by value)

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

Description

Analogous function for top_n and top_frac in dplyr, but with a different API.

Usage

top_n_dt(data, n, wt = NULL)

top_frac_dt(data, n, wt = NULL)

Arguments

data	data.frame
n	If n is positive, selects the top rows. If negative, selects the bottom rows.
wt	(Optional). The variable to use for ordering. If not specified, defaults to the last variable in the data.frame.

Value

data.table

See Also

top_n

Examples

iris %>% top_n_dt(10,Sepal.Length)
iris %>% top_n_dt(-10,Sepal.Length)
iris %>% top_frac_dt(.1,Sepal.Length)
iris %>% top_frac_dt(-.1,Sepal.Length)

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