Number Value

This hook functor identifies a real (scalar) value with a numeric identifier so it can be used inside a container functor that expects one or more scalar inputs — most commonly one of the calculator family, such as Calculate Map. It performs no computation itself: the container inspects its Value and Value Number ports and registers the value under that number, making it available as v1 in the container's expression (verbose syntax — see below).

This functor has no output ports; it only declares data for the enclosing container to pick up.

Map Algebra (Suppl.)

Number Value only stores the value and the number under which it should be registered. The container it is placed inside inspects those ports and performs the actual registration.

Number Value can only be placed directly inside one of the following container functors:

• Calculate Map
• Calculate Categorical Map
• Calculate Lookup Table Values
• Calculate Value
• Create String
• Calculate R Expression
• Calculate Python Expression
• Calculate Lookup Table Keys And Values

Placing it inside any other functor is not supported and will fail validation.

Once registered, the value is available inside the container's expression as vN (e.g., Value Number = 1 → v1). This applies to the verbose syntax only. The separate abbreviated syntax eliminates hook functors like Number Value entirely, referencing each connected input directly by its port name instead — see Calculator functor shorthand.

Once Value Number is set, the sketch banner shows #N; once the value itself is known it reads “Value #N is X” (e.g., “Value #1 is 42”), making the variable easy to identify in the model diagram.

NumberValue

• Connecting data inputs in the Calculate Map documentation — shows Number Value exposing a scalar as v1.