Objective Function Wrapping Another Objective on a Candidate Pool

An ObjectivePoolAbstract that restricts evaluation to a candidate pool and delegates evaluation to another bbotk::Objective.

Creates a new instance of this R6 class.

Arguments

pool

(data.frame | data.table)
Candidate pool containing one row per admissible configuration. Must contain all wrapped-objective domain columns.

objective

(bbotk::Objective)
Objective to wrap. It is cloned on construction.

id

(character(1))
Identifier for the objective.

domain

(paradox::ParamSet | NULL)
Parameter set describing the input space. If NULL, the wrapped objective's domain is used.

check_values

(logical(1))
Whether to check validity of input configurations against the domain. This does not affect the wrapped objective's check_values. When domain is NULL, the wrapped objective's check_values is set to FALSE. Otherwise, it is unchanged; it is up to the user to decide whether it is desirable for the wrapped objective to check values.

Details

The wrapped objective is cloned on construction. Its codomain, properties, and package requirements define the corresponding fields of the wrapper.

The wrapped objective's domain may differ from the wrapper's domain; in this case, the missing values are reconstructed from the pool columns and superfluous columns are dropped. The pool values must be unique with respect to the wrapper's domain.

Fields

objective

(bbotk::Objective)
Wrapped objective.