|
|||||||||
PREV CLASS NEXT CLASS | FRAMES NO FRAMES | ||||||||
SUMMARY: NESTED | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD |
java.lang.Objectec.BreedingSource
ec.BreedingPipeline
ec.breed.GenerationSwitchPipeline
public class GenerationSwitchPipeline
GenerationSwitchPipeline is a simple BreedingPipeline which switches its source depending on the generation. If the generation number is < n, then GenerationSwitchPipeline uses source.0. If the generation number if >= n, then GenerationSwitchPipeline uses source.1.
Important Note: Because GenerationSwitchPipeline gets the generation number from the EvolutionState, and this number is not protected by a mutex, if you create an EvolutionState or Breeder which uses multiple threads that can update the generation number as they like, you could cause a race condition. This doesn't occur with the present EvolutionState objects provided with ECJ, but you should be aware of the possibility.
Typical Number of Individuals Produced Per produce(...) call
Defined as the max of its children's responses.
Number of Sources
2
Parameters
base.generate-max bool = true (default) or false |
(Each time produce(...) is called, should the GenerationSwitchPipeline force all its sources to produce exactly the same number of individuals as the largest typical number of individuals produced by any source in the group?) |
base.switch-at int >= 0 |
(The generation we will switch at) |
Default Base
breed.generation-switch
Field Summary | |
---|---|
boolean |
generateMax
|
int |
generationSwitch
|
int |
maxGeneratable
|
static int |
NUM_SOURCES
|
static java.lang.String |
P_GEN_MAX
|
static java.lang.String |
P_MULTIBREED
|
static java.lang.String |
P_SWITCHAT
|
Fields inherited from class ec.BreedingPipeline |
---|
DYNAMIC_SOURCES, likelihood, mybase, P_LIKELIHOOD, P_NUMSOURCES, P_SOURCE, sources, V_SAME |
Fields inherited from class ec.BreedingSource |
---|
NO_PROBABILITY, P_PROB, probability |
Constructor Summary | |
---|---|
GenerationSwitchPipeline()
|
Method Summary | |
---|---|
Parameter |
defaultBase()
Returns the default base for this prototype. |
int |
numSources()
Returns the number of sources to this pipeline. |
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. |
void |
setup(EvolutionState state,
Parameter base)
Sets up the BreedingPipeline. |
int |
typicalIndsProduced()
Returns the max of typicalIndsProduced() of all its children |
Methods inherited from class ec.BreedingPipeline |
---|
clone, finishProducing, individualReplaced, maxChildProduction, minChildProduction, preparePipeline, prepareToProduce, produces, reproduce, sourcesAreProperForm |
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 |
---|
public static final java.lang.String P_SWITCHAT
public static final java.lang.String P_MULTIBREED
public static final java.lang.String P_GEN_MAX
public static final int NUM_SOURCES
public int maxGeneratable
public boolean generateMax
public int generationSwitch
Constructor Detail |
---|
public GenerationSwitchPipeline()
Method Detail |
---|
public Parameter defaultBase()
Prototype
public int numSources()
BreedingPipeline
numSources
in class BreedingPipeline
public void setup(EvolutionState state, Parameter base)
BreedingSource
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}.
setup
in interface Prototype
setup
in interface Setup
setup
in class BreedingPipeline
Prototype.setup(EvolutionState,Parameter)
public int typicalIndsProduced()
typicalIndsProduced
in class BreedingPipeline
public int produce(int min, int max, int start, int subpopulation, Individual[] inds, EvolutionState state, int thread)
BreedingSource
produce
in class BreedingSource
|
|||||||||
PREV CLASS NEXT CLASS | FRAMES NO FRAMES | ||||||||
SUMMARY: NESTED | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD |