n: The number of observations in the current group.

In sctyner/dplyr050: A Grammar of Data Manipulation

Description

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

Usage

n()

Examples

if (require("nycflights13")) {
carriers <- group_by(flights, carrier)
summarise(carriers, n())
mutate(carriers, n = n())
filter(carriers, n() < 100)
}

sctyner/dplyr050 documentation built on May 17, 2019, 2:22 p.m.