TITLE(nlevels @@ The Number of Levels of a Factor)
USAGE(
nlevels(x)
)
ALIAS(nlevels)
DESCRIPTION(
LANG(nlevels)
returns the number of levels which its argument has.
If the argument is not a factor LANG(NA) is returned.
PARA
The actual factor levels (if they exist) can be obtained
with the LANG(levels) function.
)
SEEALSO(
LANG(LINK(levels)).
)
