n_distinct: Efficiently count the number of unique values in a set of...

In sctyner/dplyr050: A Grammar of Data Manipulation

Description

This is a faster and more concise equivalent of length(unique(x))

Usage

n_distinct(..., na.rm = FALSE)

Arguments

na.rm	id TRUE missing values don't count
...	vectors of values

Examples

x <- sample(1:10, 1e5, rep = TRUE)
length(unique(x))
n_distinct(x)

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