out =
NaC ()
¶out =
NaC (sz)
¶“Not-a-Categorical". Creates missing-valued categorical arrays.
Returns a new categorical
array of all missing values of
the given size. If no input sz is given, the result is a scalar missing
categorical.
NaC
is the categorical
equivalent of NaN
or NaT
. It
represents a missing, invalid, or null value. NaC
values never compare
equal to any value, including other NaC
s.
NaC
is a convenience function which is strictly a wrapper around
categorical.undefined
and returns the same results, but may be more convenient
to type and/or more readable, especially in array expressions with several values.
See also: categorical.undefined