Some categories might not be included in the data set being analyzed.
For example, our example data set has no cases in the “15 or
younger” age group. By default, or with EMPTY=INCLUDE,
PSPP includes these empty categories in output tables. To exclude
them, specify EMPTY=EXCLUDE.
For implicit categories, empty categories potentially include all the
values with value labels for a given variable; for explicit
categories, they include all the values listed individually and all
values with value labels that are covered by ranges or MISSING
or OTHERNM.
The following example syntax and output show the effect of
EMPTY=EXCLUDE for the membersOver16 variable, in which 0
is labeled “None” but no cases exist with that value:
CTABLES /TABLE=membersOver16. CTABLES /TABLE=membersOver16 /CATEGORIES VARIABLES=membersOver16 EMPTY=EXCLUDE.
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