n_unique | R Documentation |
Function to count number of unique values in a vector. Includes NA
as a value.
n_unique(data, var = NULL)
data |
Either a vector, or a dataframe in which to find |
var |
When |
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)
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