In the absence of an explicit list of categories, CATEGORIES
allows KEY, ORDER, and MISSING to specify how to
select and sort categories.
The KEY setting specifies the sort key. By default, or with
KEY=VALUE, categories are sorted by default. Categories may
also be sorted by value label, with KEY=LABEL, or by the value
of a summary function, e.g. KEY=COUNT.
By default, or with ORDER=A, categories are sorted in ascending
order. Specify ORDER=D to sort in descending order.
User-missing values are excluded by default, or with
MISSING=EXCLUDE. Specify MISSING=INCLUDE to include
user-missing values. The system-missing value is always excluded.
The following example syntax and output show how
MISSING=INCLUDE causes missing values to be included in a
category list.
CTABLES /TABLE freqOfDriving.
CTABLES /TABLE freqOfDriving
/CATEGORIES VARIABLES=freqOfDriving MISSING=INCLUDE.
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