#### 15.7.10 Computed Categories ¶

    /PCOMPUTE &postcompute=EXPR(expression)
    /PPROPERTIES &postcompute...
        [LABEL=string]
        [FORMAT=[summary format]...]
        [HIDESOURCECATS={NO | YES}

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.