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## 13 Selecting data for analysis

This chapter documents pspp commands that temporarily or permanently select data records from the active dataset for analysis.

- FILTER: Exclude cases based on a variable.
- N OF CASES: Limit the size of the active dataset.
- SAMPLE: Select a specified proportion of cases.
- SELECT IF: Permanently delete selected cases.
- SPLIT FILE: Do multiple analyses with one command.
- TEMPORARY: Make transformations' effects temporary.
- WEIGHT: Weight cases by a variable.