SPSS® 12.0 Command Syntax Reference

Example
AGGREGATE 97
AGGREGATE OUTFILE=* /BREAK=DEPT
/LOWVAC,LOWSICK = PLT (VACDAY SICKDAY,10).
• AGGREGATE creates two aggregated variables: LOWVAC and LOWSICK. LOWVAC is the
percentage of cases with values less than 10 for VACDAY and LOWSICK is the percentage
of cases with values less than 10 for SICKDAY.
Example
AGGREGATE OUTFILE=GROUPS /BREAK=OCCGROUP
/COLLEGE = FIN(EDUC,13,16).
• AGGREGATE creates the variable COLLEGE, which is the fraction of cases with 13 to 16
years of education (variable EDUC).
Example
AGGREGATE OUTFILE=* /BREAK=CLASS
/LOCAL = PIN(STATE,’IL’,’IO’).
• AGGREGATE creates the variable LOCAL, which is the percentage of cases in each break
group whose two-letter state code represents Illinois, Indiana, or Iowa. (The abbreviation
for Indiana, IN, is between IL and IO in an alphabetical sort sequence.)
MISSING Subcommand
By default, AGGREGATE uses all nonmissing values of the source variable to calculate
aggregated variables. An aggregated variable will have a missing value only if the source
variable is missing for every case in the break group. You can alter the default missing-value
treatment by using the MISSING subcommand. You can also specify the inclusion of usermissing
values on any function.
• MISSING must immediately follow OUTFILE.
• COLUMNWISE is the only specification available for MISSING.
• If COLUMNWISE is specified, the value of an aggregated variable is missing for a break
group if the source variable is missing for any case in the group.
• COLUMNWISE does not affect the calculation of the N, NU, NMISS, or NUMISS functions.
• COLUMNWISE does not apply to break variables. If a break variable has a missing value,
cases in that group are processed and the break variable is saved in the file with the
missing value. Use SELECT IF if you want to eliminate cases with missing values for the
break variables.
Including Missing Values
You can force a function to include user-missing values in its calculations by specifying a
period after the function name.
• AGGREGATE ignores periods used with functions N, NU, NMISS, and NUMISS if these
functions have no argument.