n: The number of observations in the current group.

Description Usage Examples

View source: R/manip.r

Description

This function is implemented specifically for each data source and can only be used from within summarise(), mutate() and filter().

Usage

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n()

Examples

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

dplyr documentation built on June 9, 2017, 5:02 p.m.

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