Aggregating Data

If you are in distributed mode, connected to a remote server (available with IBM® SPSS® Statistics Server), you can aggregate the data before reading it into IBM SPSS Statistics.

You can also aggregate data after reading it into IBM SPSS Statistics, but preaggregating may save time for large data sources.

1. To create aggregated data, select one or more break variables that define how cases are grouped.
2. Select one or more aggregated variables.
3. Select an aggregate function for each aggregate variable.
4. Optionally, create a variable that contains the number of cases in each break group.

Note: If you use IBM SPSS Statistics random sampling, aggregation is not available.