tidytable (version 0.5.1)

n.: 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.()
dt_n()

Examples

# NOT RUN {
test_df <- data.table(
  x = c(1,2,3),
  y = c(4,5,6),
  z = c("a","a","b"))

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

test_df %>%
  mutate.(count = n.())
# }