SPSS® 12.0 Command Syntax Reference

404 CTABLES
LISTWISE Exclude cases that are missing on any scale variable in the table. This
ensures that summaries for all scale variables in the table are based on the
same set of cases.
Listwise deletion applies on a per-table basis. Thus, given the specification
/TABLE (AGE [MEAN,COUNT]>SEX) + (AGE+CHILDS)[MEAN,COUNT] > HAPPY
all cases with valid values for AGE will be used in the AGE > SEX table regardless of whether
they have missing values for CHILDS (assuming that they also have valid values for SEX).
MRSETS Subcommand
/MRSETS COUNTDUPLICATES= {NO }
{YES}
For multiple response sets that combine multiple category variables, a respondent can select
the same response for more than one of the variables. Typically, only one response is desired.
For example, if $MAGS combines MAG1 to MAG5 to record which magazines a respondent
reads regularly, if a respondent indicated the same magazine for MAG1 and MAG2, you would
not want to count that magazine twice. However, if $CARS combines CAR1 to CAR5 to indicate
which cars a respondent owns now, and a respondent owns two cars of the same make,
you might want to count both responses. The MRSETS subcommand allows you to specify
whether duplicates are counted. By default, duplicates are not counted.
The MRSETS specification applies only to RESPONSES and percentages based on
RESPONSES. It does not affect counts, which always ignore duplicates.