ec.breed

Class FirstCopyPipeline

java.lang.Object

ec.BreedingSource

ec.BreedingPipeline

ec.breed.FirstCopyPipeline

All Implemented Interfaces:

Prototype, Setup, SteadyStateBSourceForm, RandomChoiceChooserD, java.io.Serializable, java.lang.Cloneable

public class FirstCopyPipeline
extends BreedingPipeline

FirstCopyPipeline is a BreedingPipeline similar to ReproductionPipeline, except that after a call to prepareToProduce(...), the immediate next child produced is produced from source 0, and all the remaining children in that produce() call and in subsequent produce() calls are produced from source 1. This allows a simple approach to doing a one-child elitism by loading the elitist child from source 0 and the rest from source 1. See ec/app/ecsuite/sa.params for an example.

Typical Number of Individuals Produced Per produce(...) call
...as many as the child produces

Number of Sources
2

Default Base
breed.reproduce

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
boolean	firstTime
static int	NUM_SOURCES
static java.lang.String	P_FIRST_COPY

Fields inherited from class ec.BreedingPipeline

DYNAMIC_SOURCES, likelihood, mybase, P_LIKELIHOOD, P_NUMSOURCES, P_SOURCE, sources, V_SAME, V_STUB

Fields inherited from class ec.BreedingSource

NO_PROBABILITY, P_PROB, probability

Constructor Summary

Constructors

Constructor and Description
FirstCopyPipeline()

Method Summary

Modifier and Type	Method and Description
Parameter	defaultBase() Returns the default base for this prototype.
int	numSources() Returns the number of sources to this pipeline.
void	prepareToProduce(EvolutionState state, int subpopulation, int thread) Called before produce(...), usually once a generation, or maybe only once if you're doing steady-state evolution, to let the breeding source "warm up" prior to producing.
int	produce(int min, int max, int subpopulation, java.util.ArrayList<Individual> inds, EvolutionState state, int thread, java.util.HashMap<java.lang.String,java.lang.Object> misc) Produces n individuals from the given subpopulation and puts them into inds[start...start+n-1], where n = Min(Max(q,min),max), where q is the "typical" number of individuals the BreedingSource produces in one shot, and returns n.
void	setup(EvolutionState state, Parameter base) Sets up the BreedingPipeline.

Methods inherited from class ec.BreedingPipeline

clone, fillStubs, finishProducing, individualReplaced, maxChildProduction, minChildProduction, preparePipeline, produces, sourcesAreProperForm, typicalIndsProduced

Methods inherited from class ec.BreedingSource

getProbability, pickRandom, setProbability, setupProbabilities

Methods inherited from class java.lang.Object

equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

P_FIRST_COPY

public static final java.lang.String P_FIRST_COPY

See Also:

Constant Field Values

NUM_SOURCES

public static final int NUM_SOURCES

See Also:

Constant Field Values

firstTime

public boolean firstTime

Constructor Detail

FirstCopyPipeline

public FirstCopyPipeline()

Method Detail

defaultBase

public Parameter defaultBase()

Description copied from interface: Prototype

Returns the default base for this prototype. This should generally be implemented by building off of the static base() method on the DefaultsForm object for the prototype's package. This should be callable during setup(...).

numSources

public int numSources()

Description copied from class: BreedingPipeline

Returns the number of sources to this pipeline. Called during BreedingPipeline's setup. Be sure to return a value > 0, or DYNAMIC_SOURCES which indicates that setup should check the parameter file for the parameter "num-sources" to make its determination.

Specified by:

numSources in class BreedingPipeline

setup

public void setup(EvolutionState state,
                  Parameter base)

Description copied from class: BreedingSource

Sets up the BreedingPipeline. You can use state.output.error here because the top-level caller promises to call exitIfErrors() after calling setup. Note that probability might get modified again by an external source if it doesn't normalize right.

The most common modification is to normalize it with some other set of probabilities, then set all of them up in increasing summation; this allows the use of the fast static BreedingSource-picking utility method, BreedingSource.pickRandom(...). In order to use this method, for example, if four breeding source probabilities are {0.3, 0.2, 0.1, 0.4}, then they should get normalized and summed by the outside owners as: {0.3, 0.5, 0.6, 1.0}.

Specified by:

setup in interface Prototype

Specified by:

setup in interface Setup

Overrides:

setup in class BreedingPipeline

See Also:

Prototype.setup(EvolutionState,Parameter)

prepareToProduce

public void prepareToProduce(EvolutionState state,
                             int subpopulation,
                             int thread)

Description copied from class: BreedingSource

Called before produce(...), usually once a generation, or maybe only once if you're doing steady-state evolution, to let the breeding source "warm up" prior to producing. Individuals should be produced from old individuals in positions [start...start+length] in the subpopulation only. May be called again to reset the BreedingSource for a whole 'nuther subpopulation.

Overrides:

prepareToProduce in class BreedingPipeline

produce

public int produce(int min,
                   int max,
                   int subpopulation,
                   java.util.ArrayList<Individual> inds,
                   EvolutionState state,
                   int thread,
                   java.util.HashMap<java.lang.String,java.lang.Object> misc)

Description copied from class: BreedingSource

Produces n individuals from the given subpopulation and puts them into inds[start...start+n-1], where n = Min(Max(q,min),max), where q is the "typical" number of individuals the BreedingSource produces in one shot, and returns n. max must be >= min, and min must be >= 1. For example, crossover might typically produce two individuals, tournament selection might typically produce a single individual, etc.

Specified by:

produce in class BreedingSource