.unique_and_sorted {cards} | R Documentation |
Essentially a wrapper for unique(x) |> sort()
with NA
levels removed.
For factors, all levels are returned even if they are unobserved.
Similarly, logical vectors always return c(TRUE, FALSE)
, even if
both levels are not observed.
.unique_and_sorted(x, useNA = c("no", "always"))
x |
( |
a vector
cards:::.unique_and_sorted(factor(letters[c(5, 5:1)], levels = letters))
cards:::.unique_and_sorted(c(FALSE, TRUE, TRUE, FALSE))
cards:::.unique_and_sorted(c(5, 5:1))