pg.evolution.recombinators.Average

Accessible via pg.evolution.recombinators.Average.

class Average(where=All())

Bases: pg.evolution.recombinators.Numeric

Average crossover.

Average crossover performs point-wise average of the parents’ decisions on float decision points. We include this recombinator to help float decisions converge.

References: https://link.springer.com/content/pdf/10.1007/s00500-006-0049-7.pdf

Methods:

merge(decision_point, parent_decisions)

Implementation of point-wise decision making.

merge(decision_point, parent_decisions)

Implementation of point-wise decision making.

Return type:

float

Parameters:

• decision_point – Decision point for recombination.

• parent_decisions – A list of parent’s decisions. Each item should be an int as an active single-choice decision, a list of int as active multi- choice decisions, a float as an active float decision, or None for inactive decision point (whose parent space is not chosen).

• global_state – An optional keyword argument as the global state. Subclass can omit.

• step – An optional keyword argument as the current step. Subclass can omit.

Returns:

An int, list of int or float as the decision made for the decision point.