dplyr: n_distinct – R documentation

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n_distinct

Efficiently count the number of unique values in a set of vectors

Description

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

Usage

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

Arguments

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

Examples

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

dplyr

A Grammar of Data Manipulation

v1.0.6

MIT + file LICENSE

Authors

Hadley Wickham [aut, cre] (<https://orcid.org/0000-0003-4757-117X>), Romain François [aut] (<https://orcid.org/0000-0002-2444-4226>), Lionel Henry [aut], Kirill Müller [aut] (<https://orcid.org/0000-0002-1416-3412>), RStudio [cph, fnd]

Initial release