n: Number of observations in each group

In mtfairbanks/gdt: Tidy Interface to 'data.table'

Number of observations in each group

Description

Helper function that can be used to find counts by group.

Can be used inside summarize(), mutate(), & filter()

Usage

n()

Examples

df <- data.table(
  x = 1:3,
  y = 4:6,
  z = c("a","a","b")
 )

df %>%
  summarize(count = n(), .by = z)

mtfairbanks/gdt documentation built on Jan. 26, 2025, 8:24 a.m.