n_distinct: Efficiently count the number of unique values in a set of...
In YTLogos/dplyr: A Grammar of Data Manipulation

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

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

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

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

YTLogos/dplyr documentation built on May 20, 2019, 1:44 p.m.

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