n

0th

Percentile

The number of observations in the current group.

This function is implemented special for each data source and can only be used from within summarise, mutate and filter

Usage
n()
Aliases
  • n
Examples
if (require("nycflights13")) {
carriers <- group_by(flights, carrier)
summarise(carriers, n())
mutate(carriers, n = n())
filter(carriers, n() < 100)
}
Documentation reproduced from package dplyr, version 0.3, License: MIT + file LICENSE

Community examples

anitaluilei@gmail.com at Nov 9, 2019 dplyr v0.7.8

if (require("nycflights13")) { carriers <- group_by(flights, carrier) summarise(carriers, n())

tantonijevic at Nov 9, 2018 dplyr v0.7.7

# NOT RUN { if (require("nycflights13")) { carriers <- group_by(flights, carrier) summarise(carriers, n()) mutate(carriers, n = n()) filter(carriers, n() < 100) } # }