SPSS Aggregate

The AGGREGATE command computes descriptive statistics.

Usage

aggregate outfile=* mode=addvariables
  /Total_Sales = sum(Sales).

See here for the list of available AGGREGATE functions.

Break

The /BREAK subcommand specifies one or more variables to split aggregation.

Note that omitting a /BREAK subcommand is unsupported in SPSS version 16 or earlier, and in PSPP version 1.6.2 or earlier.

Presorted

If the dataset is already sorted by all variables specified on the /BREAK subcommand, use the '/PRESORTED subcommand to skip re-sorting. The /PRESORTED subcommand must precede the /BREAK subcommand.

Outfile and Mode

The default behavior is OUTFILE=* and MODE=ADDVARIABLES (i.e. modify the active dataset in-place and add variables to it).

To instead populate a new dataset, try:

sort cases by VARLIST.
dataset declare DUPLICATES.
aggregate
  /outfile="DUPLICATES"
  /presorted
  /break=VARLIST
  /COUNT=N.
execute.
dataset activate DUPLICATES.
select if COUNT>1.

Data Model

The AGGREGATE command causes all pending transformations to execute, and reads the active dataset.

See also

PSPP manual for AGGREGATE

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