Class TruncationSelectionStrategy<TGenome>

A truncation selection strategy.

This selection strategy selects the top sliceThresholdRate fraction of the population as parents for mutation and crossover.

Type Parameters

TGenome extends BaseGenome
The type of genome objects in the population.

Hierarchy (View Summary)

RandomSelectionStrategy<TGenome>
- TruncationSelectionStrategy

Index

Constructors

Properties

crossoverParentsCount sliceThresholdRate

Methods

selectForCrossover selectForMutation

Constructors

constructor

new TruncationSelectionStrategy<TGenome extends BaseGenome>(
crossoverParentsCount: number,
sliceThresholdRate: number,
): TruncationSelectionStrategy<TGenome>
Constructor of the truncation selection strategy.
Type Parameters
- TGenome extends BaseGenome
Parameters
- crossoverParentsCount: number
  The number of parents to select for crossover.
- sliceThresholdRate: number
  The rate at which to slice the population.
Returns TruncationSelectionStrategy<TGenome>
Overrides RandomSelectionStrategy.constructor
- Defined in src/strategies.ts:303

Properties

`Protected` `Readonly`crossoverParentsCount

crossoverParentsCount: number

`Protected` `Readonly`sliceThresholdRate

sliceThresholdRate: number

Methods

selectForCrossover

selectForCrossover(
input: EvaluatedGenome<TGenome>[],
count: number,
): TGenome[][]
Selects parents for crossover.
Parameters
- input: EvaluatedGenome<TGenome>[]
  The population extended with fitness scores and phenome to select parents from.
- count: number
  The number of parents to select.
Returns TGenome[][]
An array of parents arrays.
Overrides RandomSelectionStrategy.selectForCrossover
- Defined in src/strategies.ts:315

selectForMutation

selectForMutation(input: EvaluatedGenome<TGenome>[], count: number): TGenome[]
Selects parents for mutation.
Parameters
- input: EvaluatedGenome<TGenome>[]
  The population extended with fitness scores and phenome to select parents from.
- count: number
  The number of parents to select.
Returns TGenome[]
An array of parents.
Overrides RandomSelectionStrategy.selectForMutation
- Defined in src/strategies.ts:329