n_unique: Count unique values of vector

In wepelham3/sack2: Miscellaneous Functions Used Across Projects

Count unique values of vector

Description

Function to count number of unique values in a vector. Includes NA as a value.

Usage

n_unique(data, var = NULL)

Arguments

data	Either a vector, or a dataframe in which to find var.
var	When data is a dataframe, bare or quoted name of column to use.

Examples

n_unique(c(0, 1))
n_unique(c(0, 1, NA))
n_unique(rnorm(10))
n_unique(rbinom(10, 1, .5))

# illustrate two formats of dataframe inputs

df <- data.frame(x = c(0, 1, 2, NA),
                 y = c(0, 0, 0, NA),
                 group = c("yes", "no", "no", "yes"))

n_unique(df, "x")
n_unique(df, x)

wepelham3/sack2 documentation built on Aug. 5, 2023, 5:53 a.m.