dict_scalors_fixedprojection: Multi-Objective Fixed Projection Scalor

In miesmuschel: Mixed Integer Evolution Strategies

Multi-Objective Fixed Projection Scalor

Description

Scalor that returns the maximum of a set of projections.

Priming PS must contain a "scalarization_weights" tagged p_uty that contains weight matrices (Nobjectives x Nweights) or vectors (if Nweights is 1).

Configuration Parameters

• scalarization :: function
  Function taking a fitness-matrix fitnesses (Nindivs x Nobjectives, with higher values indicating higher desirability) and a list of weight matrices weights (Nindivs elements of Nobjectives x Nweights matrices; positive weights should indicate a positive contribution to scale) and returns a matrix of scalarizations (Nindivs x Nweights, with higher values indicating greater desirability).
  While custom functions can be used, it is recommended to use a Scalarizer, such as scalarizer_linear(), or scalarizer_chebyshev().

Supported Operand Types

Supported Domain classes are: p_lgl ('ParamLgl'), p_int ('ParamInt'), p_dbl ('ParamDbl'), p_fct ('ParamFct')

Dictionary

This Scalor can be created with the short access form scl() (scls() to get a list), or through the the dictionary dict_scalors in the following way:

# preferred:
scl("fixedprojection")
scls("fixedprojection")  # takes vector IDs, returns list of Scalors

# long form:
dict_scalors$get("fixedprojection")

Super classes

miesmuschel::MiesOperator -> miesmuschel::Scalor -> ScalorFixedProjection

Active bindings

weights_component_id

(numeric(1))
search space component identifying the weights by which to scalarize.

Methods

Public methods

• ScalorFixedProjection$new()

• ScalorFixedProjection$prime()

• ScalorFixedProjection$clone()

Inherited methods

• miesmuschel::MiesOperator$help()
• miesmuschel::MiesOperator$operate()
• miesmuschel::MiesOperator$print()
• miesmuschel::MiesOperator$repr()

---

Method new()

Initialize the ScalorFixedProjection object.

Usage

ScalorFixedProjection$new(weights_component_id = "scalarization_weights")

Arguments

weights_component_id

(character(1))
Id of the search space component identifying the weights by which to scalarize. Default "scalarization_weights".

---

Method prime()

See MiesOperator method. Primes both this operator, as well as the operator given to the operation configuration parameter. Note that this modifies the ⁠$param_set$values$operation⁠ object.

Usage

ScalorFixedProjection$prime(param_set)

Arguments

param_set

(ParamSet)
Passed to MiesOperator⁠$prime()⁠.

Returns

invisible self.

---

Method clone()

The objects of this class are cloneable with this method.

Usage

ScalorFixedProjection$clone(deep = FALSE)

Arguments

deep

Whether to make a deep clone.

See Also

Other scalors: Scalor, dict_scalors_aggregate, dict_scalors_domcount, dict_scalors_hypervolume, dict_scalors_nondom, dict_scalors_one, dict_scalors_proxy, dict_scalors_single

Other scalor wrappers: dict_scalors_aggregate, dict_scalors_proxy

Examples

set.seed(1)

miesmuschel documentation built on April 4, 2025, 5:19 a.m.