Lookup Table Group Type

A Lookup Table Group is a generic collection of Lookup Table values, each identified by a positive integer index. It's used where a functor needs to work with a whole set of lookup tables together rather than one at a time — for example, Genetic Algorithm Tool represents each individual in its population as a Lookup Table Group, since a candidate solution there is typically made up of several related parameter lookup tables rather than a single one.

Input ports of type Lookup Table Group are non-editable, so a lookup table group cannot be defined using an editor in the graphical interface. A value must always come from connecting an output produced by another functor — Create Lookup Table Group assembles multiple lookup tables into a group, and Extract Lookup Table From Lookup Table Group does the reverse, pulling a single Lookup Table back out by its index.

For the same reason, input ports of type Lookup Table Group cannot receive a constant in EGO Script — see Constants. A single Lookup Table also converts automatically wherever a Lookup Table Group is expected, so it can be connected directly without an intermediate step:

rates := [ 1991 0.02, 1993 0.025 ];
// rates converts automatically from LookupTable to LookupTableGroup here.
first := ExtractLookupTableFromLookupTableGroup rates 1;

• Converted from: Table Type and Lookup Table Type.

• Converted to: Table Type, Base Table Type, and Lookup Table Type — each of these narrowing conversions checks that every lookup table in the group actually fits the expected shape.

See Type System for how a Lookup Table Group's format is treated as a generic collection rather than a single fixed shape, and for the complete conversion reference across all types.