15.7.10 Computed Categories

/PCOMPUTE &postcompute=EXPR(expression)
/PPROPERTIES &postcompute…
    [FORMAT=[summary format]…]

Computed categories, also called postcomputes, are categories created using arithmetic on categories obtained from the data. The PCOMPUTE subcommand creates a postcompute, which may then be used on CATEGORIES within an explicit category list (see CTABLES Explicit Category List). Optionally, PPROPERTIES refines how a postcompute is displayed. The following sections provide the details.