Number of elements in a vector.

lunique returns the number of non-NA unique elements and lna returns the number of NAs.

lunique(x)

lna(x)

Arguments

x	A vector.

Value

A non-negative integer.

See also

length(), unique(), is.na()

Examples

x <- sample(c(1:3, NA), 10, replace = TRUE)
lunique(x)
#> [1] 2
lna(x)
#> [1] 1