tidytable: top_n..html – R documentation

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top_n..html

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

Description

Select the top or bottom entries in each group, ordered by wt.

Usage

top_n.(.df, n = 5, wt = NULL, .by = NULL)

Arguments

`.df`	A data.frame or data.table
`n`	Number of rows to return
`wt`	Optional. The variable to use for ordering. If NULL uses the last column in the data.table.
`.by`	Columns to group by

Examples

test_df <- data.table(
  x = 1:5,
  y = 6:10,
  z = c(rep("a", 3), rep("b", 2))
)

test_df %>%
  top_n.(2, wt = y)

test_df %>%
  top_n.(2, wt = y, .by = z)

tidytable

Tidy Interface to 'data.table'

v0.6.1

MIT + file LICENSE

Authors

Mark Fairbanks [aut, cre], Abdessabour Moutik [ctb], Matt Carlson [ctb], Ivan Leung [ctb], Ross Kennedy [ctb]

Initial release