How to use SPSS/Tips

File types
There are three types of files:
 * .sav (data files)
 * .spo (output files)
 * .sps (syntaxt files.

Syntax

 * 1) Syntax is recommended because of its efficiency, particularly for large, complex studies because it provides a record of commands so that they can be easily re-run.
 * 2) * For an introduction to syntax, see SPSS - Help - Tutorials - Using Syntax
 * 3) * SPSS commands all finish with a full-stop.
 * 4) * Comments can be added using * comment . (each command must finish with a full-stop)
 * 5) * Blank lines are ignored
 * 6) * Casing is ignored
 * 7) * Click cursor anywhere within a command and click run (the black triangle) - this executes one command; to execut multiple commands highlight at least some part of all commands of interest, then click run.
 * 8) * Save your syntax file regularly - because SPSS will crash (sooner or later).
 * 9) To show the syntax in the output:
 * 10) * Edit - Options - Viewer - Display commands in log
 * 11) To show variables names (not labels) in dialog boxes:
 * 12) * Edit - Options - General
 * 13) ** Display names (often easier than labels)
 * 14) ** File order or alphabetical order?