ec.es
Class ESSelection
java.lang.Object
|
+--ec.BreedingSource
|
+--ec.SelectionMethod
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+--ec.es.ESSelection
- All Implemented Interfaces:
- java.lang.Cloneable, Prototype, RandomChoiceChooser, java.io.Serializable, Setup
- public class ESSelection
- extends SelectionMethod
ESSelection is a special SelectionMethod designed to be used with
evolutionary strategies (ESEvolutionState) and its associated breeders.
The rule is simple: if your pipeline returns N children when
you called it, ESSelection objects must have been called exactly
N times (selecting N children altogether in that pass).
No more, no less. You can use other selection methods (Tournament
Selection is a good choice) to fill the slack.
See ESEvolutionState for ideas on doing this with various
breeding pipeline examples.
Default Base
es.select
- See Also:
- Serialized Form
Method Summary |
Parameter |
defaultBase()
Returns the default base for this prototype. |
void |
finishProducing(EvolutionState s,
int subpopulation,
int thread)
A default version of finishProducing, which does nothing. |
void |
preparePipeline(java.lang.Object hook)
A hook which should be passed to all your subsidiary breeding
sources. |
void |
prepareToProduce(EvolutionState s,
int subpopulation,
int thread)
A default version of prepareToProduce which does nothing. |
int |
produce(int subpopulation,
EvolutionState state,
int thread)
An alternative form of "produce" special to Selection Methods;
selects an individual from the given subpopulation and
returns its position in that subpopulation. |
int |
produce(int min,
int max,
int start,
int subpopulation,
Individual[] inds,
EvolutionState state,
int thread)
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. |
boolean |
produces(EvolutionState state,
Population newpop,
int subpopulation,
int thread)
A default version of produces -- this method always returns
true under the assumption that the selection method works
with all Fitnesses. |
int |
typicalIndsProduced()
Returns 1 |
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
P_ESSELECT
public static final java.lang.String P_ESSELECT
ESSelection
public ESSelection()
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(...).
typicalIndsProduced
public int typicalIndsProduced()
- Returns 1
- Overrides:
typicalIndsProduced
in class SelectionMethod
produce
public int produce(int subpopulation,
EvolutionState state,
int thread)
- An alternative form of "produce" special to Selection Methods;
selects an individual from the given subpopulation and
returns its position in that subpopulation.
- Overrides:
produce
in class SelectionMethod
produces
public boolean produces(EvolutionState state,
Population newpop,
int subpopulation,
int thread)
- A default version of produces -- this method always returns
true under the assumption that the selection method works
with all Fitnesses. If this isn't the case, you should override
this to return your own assessment.
- Overrides:
produces
in class SelectionMethod
prepareToProduce
public void prepareToProduce(EvolutionState s,
int subpopulation,
int thread)
- A default version of prepareToProduce which does nothing.
- Overrides:
prepareToProduce
in class SelectionMethod
finishProducing
public void finishProducing(EvolutionState s,
int subpopulation,
int thread)
- A default version of finishProducing, which does nothing.
- Overrides:
finishProducing
in class SelectionMethod
produce
public int produce(int min,
int max,
int start,
int subpopulation,
Individual[] inds,
EvolutionState state,
int thread)
throws java.lang.CloneNotSupportedException
- 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.
- Overrides:
produce
in class SelectionMethod
preparePipeline
public void preparePipeline(java.lang.Object hook)
- Description copied from class:
BreedingSource
- A hook which should be passed to all your subsidiary breeding
sources. If you are a BreedingPipeline and you
implement your sources in a way different
than using the sources[] array, be sure to override this method
so that it calls preparePipeline(hook) on all of your sources.
This method might get called more than once, and by various objects
as needed. If you use it, you should determine somehow how to use
it to send information under the assumption that it might be sent
by nested items in the pipeline; you don't want to scribble over
each other's calls! Note that this method should travel *all*
breeding source paths regardless of whether or not it's redundant to
do so.
- Overrides:
preparePipeline
in class SelectionMethod