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CBN should now also work with (m+l)-ES

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This commit is contained in:
Marcel Kronfeld 2008-03-31 16:22:07 +00:00
parent ae0c66c212
commit a62b85ec29
3 changed files with 51 additions and 18 deletions
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12
src/javaeva/server/go/operators/postprocess/PostProcess.java
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@ -321,14 +321,16 @@ public class PostProcess {
* @param maxSteps
* @param fixedStepSize
*/
public static void processWithHC(Population pop, AbstractOptimizationProblem problem, int maxSteps, double fixedStepSize) {
public static int processWithHC(Population pop, AbstractOptimizationProblem problem, int maxSteps, double fixedStepSize) {
// pop.SetFunctionCalls(0); // or else optimization wont restart on an "old" population
// pop.setGenerationTo(0);
int stepsBef = pop.getFunctionCalls();
processWithHC(pop, problem, new EvaluationTerminator(pop.getFunctionCalls()+maxSteps), new MutateESFixedStepSize(fixedStepSize));
return pop.getFunctionCalls()-stepsBef;
}
public static void processWithHC(Population pop, AbstractOptimizationProblem problem, int maxSteps) {
processWithHC(pop, problem, maxSteps, defaultMutationStepSize);
public static int processWithHC(Population pop, AbstractOptimizationProblem problem, int maxSteps) {
return processWithHC(pop, problem, maxSteps, defaultMutationStepSize);
}
/**
* Optimize a population with a default hill-climbing heuristic with a given termination criterion and mutation operator.
@ -504,8 +506,8 @@ public class PostProcess {
} else clusteredPop = inputPop;
if (params.getPostProcessSteps() > 0) {
processWithHC(clusteredPop, problem, params.getPostProcessSteps());
if (listener != null) listener.println("HC post processing: " + params.getPostProcessSteps() + " steps done.");
int stepsDone = processWithHC(clusteredPop, problem, params.getPostProcessSteps());
if (listener != null) listener.println("HC post processing: " + stepsDone + " steps done.");
// some individuals may have now converged again
if (params.getPostProcessClusterSigma() > 0) {
// so if wished, cluster again.

20
src/javaeva/server/go/strategies/ClusterBasedNichingEA.java
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@ -307,22 +307,30 @@ public class ClusterBasedNichingEA implements InterfacePopulationChangedEventLis
// m_Optimizer.initByPopulation(species, false);
if (m_Optimizer instanceof EvolutionStrategies) {
EvolutionStrategies es = (EvolutionStrategies)m_Optimizer;
int mu = (int)(muLambdaRatio*species.size());
if (mu < 1) mu = 1;
else if (mu >= species.size()) {
int mu = Math.max(1,(int)(muLambdaRatio*species.size()));
if (mu >= species.size()) {
if (TRACE) System.err.println("warning, muLambdaRatio produced mu >= lambda.. reducing to mu=lambda-1");
mu = species.size() - 1;
}
es.setMu(mu);
es.setLambda(species.size());
if (TRACE) System.out.println("mu: "+es.getMu() + " / lambda: " + es.getLambda());
}
if (TRACE) {
System.out.println("spec size: " + species.size() + ", says its " + species.getPopulationSize());
System.out.println("Bef: spec size: " + species.size() + ", says its " + species.getPopulationSize());
System.out.println("Best bef: " + BeanInspector.toString(m_Optimizer.getPopulation().getBestFitness()));
}
this.m_Optimizer.optimize();
if (TRACE) System.out.println("Best aft: " + BeanInspector.toString(m_Optimizer.getPopulation().getBestFitness()));
return m_Optimizer.getPopulation();
Population retPop = m_Optimizer.getPopulation();
if (TRACE) {
System.out.println("Aft: spec size: " + retPop.size() + ", says its " + retPop.getPopulationSize());
System.out.println("Best aft: " + BeanInspector.toString(retPop.getBestFitness()));
}
if (retPop.size() != retPop.getPopulationSize()) {
if (TRACE) System.out.println("correcting popsize after opt: " + retPop.getPopulationSize() + " to " + retPop.size());
retPop.setPopulationSize(retPop.size());
}
return retPop;
}
public void optimize() {

37
src/javaeva/server/go/strategies/EvolutionStrategies.java
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@ -39,7 +39,9 @@ public class EvolutionStrategies implements InterfaceOptimizer, java.io.Serializ
private InterfaceSelection m_PartnerSelection = new SelectRandom();
private InterfaceSelection m_EnvironmentSelection = new SelectBestIndividuals();
private int m_NumberOfPartners = 1;
private int origPopSize = -1; // especially for CBN
private double[] m_FitnessOfParents = null;
private boolean forceOrigPopSize = true;// especially for CBN
transient private String m_Identifier = "";
transient private InterfacePopulationChangedEventListener m_Listener;
@ -75,14 +77,14 @@ public class EvolutionStrategies implements InterfaceOptimizer, java.io.Serializ
public void init() {
// @todo In case of CBN-ES i need to read the population size!?
// @todo but how!? I guess this will never do...
int orgPopSize = this.m_Population.getPopulationSize();
if (this.m_InitialPopulationSize > orgPopSize) {
this.m_Population.setPopulationSize(this.m_InitialPopulationSize);
}
// int orgPopSize = this.m_Population.getPopulationSize();
// if (this.m_InitialPopulationSize > orgPopSize) {
// this.m_Population.setPopulationSize(this.m_InitialPopulationSize);
// }
//System.out.println("init");
this.m_Problem.initPopulation(this.m_Population);
this.evaluatePopulation(this.m_Population);
this.m_Population.setPopulationSize(orgPopSize);
// this.m_Population.setPopulationSize(orgPopSize);
this.firePropertyChangedEvent("NextGenerationPerformed");
// int myu = this.m_Population.getPopulationSize();
// int initPopSize = 0;
@ -101,6 +103,8 @@ public class EvolutionStrategies implements InterfaceOptimizer, java.io.Serializ
* @param reset If true the population is reset.
*/
public void initByPopulation(Population pop, boolean reset) {
origPopSize = pop.getPopulationSize();
// System.out.println("ES: orig popsize is " + origPopSize);
this.m_Population = (Population)pop.clone();
if (reset) this.m_Population.init();
this.evaluatePopulation(this.m_Population);
@ -181,11 +185,14 @@ public class EvolutionStrategies implements InterfaceOptimizer, java.io.Serializ
//// System.out.println("Population Strategy: ("+ this.m_Myu+","+this.m_Lambda+")");
// }
//System.out.println("optimize");
// first perform the environment selection to select myu parents
this.m_EnvironmentSelection.prepareSelection(this.m_Population);
parents = this.m_EnvironmentSelection.selectFrom(this.m_Population, this.m_Mu);
this.m_Population.clear();
this.m_Population.addPopulation(parents);
// now generate the lambda offsprings
this.m_FitnessOfParents = null;
nextGeneration = this.generateChildren();
@ -199,7 +206,21 @@ public class EvolutionStrategies implements InterfaceOptimizer, java.io.Serializ
this.applySuccessRule((rate/((double)this.m_FitnessOfParents.length)), this.m_Population, nextGeneration);
}
if (this.m_UsePlusStrategy) nextGeneration.addPopulation(this.m_Population);
this.m_Population = nextGeneration;
if (forceOrigPopSize && (origPopSize > 0) && (origPopSize < nextGeneration.size())) {
// this is especially for CBN:
this.m_EnvironmentSelection.prepareSelection(nextGeneration);
Population tmpPop = (Population)nextGeneration.clone();
nextGeneration.clear();
nextGeneration.addPopulation(this.m_EnvironmentSelection.selectFrom(tmpPop, origPopSize));
// System.out.println("ES post selection! " + origPopSize + " from " + tmpPop.size());
m_Population = nextGeneration;
} else {
if ((origPopSize > 0) && (origPopSize != nextGeneration.size())) {
System.err.println("Warning in ES! orig: " + origPopSize + " / " + nextGeneration.size());
}
this.m_Population = nextGeneration;
}
//System.out.println("Population size: " + this.m_Population.size());
//System.out.println("-- Best Fitness " + this.m_Population.getBestFitness()[0]);
@ -208,7 +229,7 @@ public class EvolutionStrategies implements InterfaceOptimizer, java.io.Serializ
/** This method is just a shortcut to set the mutation step size for
* all individuals of these two populations for the 1/5 Success rule.
* This is only necessary because i decieded to make the variable
* This is only necessary because i decided to make the variable
* non static
* @param successRate The success rate
* @param oldPop The old population
@ -353,6 +374,8 @@ public class EvolutionStrategies implements InterfaceOptimizer, java.io.Serializ
return this.m_Population;
}
public void setPopulation(Population pop){
origPopSize = pop.size();
// System.out.println("ES: orig popsize is " + origPopSize);
this.m_Population = pop;
}
public String populationTipText() {