/// <summary>
/// Setup and solve the TSP.
/// </summary>
public void Execute(IExampleInterface app)
{
this.app = app;
var builder = new StringBuilder();
initCities();
IPopulation pop = initPopulation();
ICalculateScore score = new TSPScore(cities);
genetic = new TrainEA(pop,score);
genetic.AddOperation(0.9,new SpliceNoRepeat(CITIES/3));
genetic.AddOperation(0.1,new MutateShuffle());
int sameSolutionCount = 0;
int iteration = 1;
double lastSolution = Double.MaxValue;
while (sameSolutionCount < MAX_SAME_SOLUTION) {
genetic.Iteration();
double thisSolution = genetic.Error;
builder.Length = 0;
builder.Append("Iteration: ");
builder.Append(iteration++);
builder.Append(", Best Path Length = ");
builder.Append(thisSolution);
Console.WriteLine(builder.ToString());
if (Math.Abs(lastSolution - thisSolution) < 1.0) {
sameSolutionCount++;
} else {
sameSolutionCount = 0;
}
lastSolution = thisSolution;
}
Console.WriteLine("Good solution found:");
displaySolution();
genetic.FinishTraining();
}
/// <summary>
/// Create an EPL GA trainer.
/// </summary>
/// <param name="method">The method to use.</param>
/// <param name="training">The training data to use.</param>
/// <param name="argsStr">The arguments to use.</param>
/// <returns>The newly created trainer.</returns>
public IMLTrain Create(IMLMethod method,
IMLDataSet training, String argsStr)
{
PrgPopulation pop = (PrgPopulation)method;
ICalculateScore score = new TrainingSetScore(training);
TrainEA train = new TrainEA(pop, score);
train.Rules.AddRewriteRule(new RewriteConstants());
train.Rules.AddRewriteRule(new RewriteAlgebraic());
train.CODEC = new PrgCODEC();
train.AddOperation(0.8, new SubtreeCrossover());
train.AddOperation(0.1, new SubtreeMutation(pop.Context, 4));
train.AddOperation(0.1, new ConstMutation(pop.Context, 0.5, 1.0));
train.AddScoreAdjuster(new ComplexityAdjustedScore());
train.Speciation = new PrgSpeciation();
return train;
}
public void Eval(String start, String expect)
{
EncogProgramContext context = new EncogProgramContext();
StandardExtensions.CreateNumericOperators(context);
PrgPopulation pop = new PrgPopulation(context, 1);
ICalculateScore score = new ZeroEvalScoreFunction();
TrainEA genetic = new TrainEA(pop, score);
genetic.ValidationMode = true;
genetic.CODEC = new PrgCODEC();
genetic.AddOperation(0.95, new SubtreeCrossover());
genetic.AddOperation(0.05, new SubtreeMutation(context, 4));
genetic.AddScoreAdjuster(new ComplexityAdjustedScore());
genetic.Rules.AddRewriteRule(new RewriteConstants());
genetic.Rules.AddRewriteRule(new RewriteAlgebraic());
EncogProgram expression = new EncogProgram(context);
expression.CompileExpression(start);
RenderCommonExpression render = new RenderCommonExpression();
genetic.Rules.Rewrite(expression);
Assert.AreEqual(expect, render.Render(expression));
}
/// <summary>
/// Program entry point.
/// </summary>
/// <param name="app">Holds arguments and other info.</param>
public void Execute(IExampleInterface app)
{
IMLDataSet trainingData = GenerationUtil.GenerateSingleDataRange(
(x) => (3 * Math.Pow(x, 2) + (12 * x) + 4)
, 0, 100, 1);
EncogProgramContext context = new EncogProgramContext();
context.DefineVariable("x");
StandardExtensions.CreateNumericOperators(context);
PrgPopulation pop = new PrgPopulation(context, 1000);
MultiObjectiveFitness score = new MultiObjectiveFitness();
score.AddObjective(1.0, new TrainingSetScore(trainingData));
TrainEA genetic = new TrainEA(pop, score);
genetic.ValidationMode = true;
genetic.CODEC = new PrgCODEC();
genetic.AddOperation(0.5, new SubtreeCrossover());
genetic.AddOperation(0.25, new ConstMutation(context, 0.5, 1.0));
genetic.AddOperation(0.25, new SubtreeMutation(context, 4));
genetic.AddScoreAdjuster(new ComplexityAdjustedScore(10, 20, 10, 20.0));
genetic.Rules.AddRewriteRule(new RewriteConstants());
genetic.Rules.AddRewriteRule(new RewriteAlgebraic());
genetic.Speciation = new PrgSpeciation();
(new RampedHalfAndHalf(context, 1, 6)).Generate(new EncogRandom(), pop);
genetic.ShouldIgnoreExceptions = false;
EncogProgram best = null;
genetic.ThreadCount = 1;
try
{
for (int i = 0; i < 1000; i++)
{
genetic.Iteration();
best = (EncogProgram)genetic.BestGenome;
Console.Out.WriteLine(genetic.IterationNumber + ", Error: "
+ best.Score + ",Best Genome Size:" + best.Size
+ ",Species Count:" + pop.Species.Count + ",best: " + best.DumpAsCommonExpression());
}
//EncogUtility.evaluate(best, trainingData);
Console.Out.WriteLine("Final score:" + best.Score
+ ", effective score:" + best.AdjustedScore);
Console.Out.WriteLine(best.DumpAsCommonExpression());
//pop.dumpMembers(Integer.MAX_VALUE);
//pop.dumpMembers(10);
}
catch (Exception t)
{
Console.Out.WriteLine(t.ToString());
}
finally
{
genetic.FinishTraining();
EncogFramework.Instance.Shutdown();
}
}
/// <summary>
/// Construct a NEAT (or HyperNEAT trainer.
/// </summary>
/// <param name="population">The population.</param>
/// <param name="calculateScore">The score function.</param>
/// <returns>The NEAT EA trainer.</returns>
public static TrainEA ConstructNEATTrainer(NEATPopulation population,
ICalculateScore calculateScore)
{
var result = new TrainEA(population, calculateScore) {Speciation = new OriginalNEATSpeciation()};
result.Selection = new TruncationSelection(result, 0.3);
var weightMutation = new CompoundOperator();
weightMutation.Components.Add(
0.1125,
new NEATMutateWeights(new SelectFixed(1),
new MutatePerturbLinkWeight(0.02)));
weightMutation.Components.Add(
0.1125,
new NEATMutateWeights(new SelectFixed(2),
new MutatePerturbLinkWeight(0.02)));
weightMutation.Components.Add(
0.1125,
new NEATMutateWeights(new SelectFixed(3),
new MutatePerturbLinkWeight(0.02)));
weightMutation.Components.Add(
0.1125,
new NEATMutateWeights(new SelectProportion(0.02),
new MutatePerturbLinkWeight(0.02)));
weightMutation.Components.Add(
0.1125,
new NEATMutateWeights(new SelectFixed(1),
new MutatePerturbLinkWeight(1)));
weightMutation.Components.Add(
0.1125,
new NEATMutateWeights(new SelectFixed(2),
new MutatePerturbLinkWeight(1)));
weightMutation.Components.Add(
0.1125,
new NEATMutateWeights(new SelectFixed(3),
new MutatePerturbLinkWeight(1)));
weightMutation.Components.Add(
0.1125,
new NEATMutateWeights(new SelectProportion(0.02),
new MutatePerturbLinkWeight(1)));
weightMutation.Components.Add(
0.03,
new NEATMutateWeights(new SelectFixed(1),
new MutateResetLinkWeight()));
weightMutation.Components.Add(
0.03,
new NEATMutateWeights(new SelectFixed(2),
new MutateResetLinkWeight()));
weightMutation.Components.Add(
0.03,
new NEATMutateWeights(new SelectFixed(3),
new MutateResetLinkWeight()));
weightMutation.Components.Add(
0.01,
new NEATMutateWeights(new SelectProportion(0.02),
new MutateResetLinkWeight()));
weightMutation.Components.FinalizeStructure();
result.ChampMutation = weightMutation;
result.AddOperation(0.5, new NEATCrossover());
result.AddOperation(0.494, weightMutation);
result.AddOperation(0.0005, new NEATMutateAddNode());
result.AddOperation(0.005, new NEATMutateAddLink());
result.AddOperation(0.0005, new NEATMutateRemoveLink());
result.Operators.FinalizeStructure();
if (population.IsHyperNEAT)
{
result.CODEC = new HyperNEATCODEC();
}
else
{
result.CODEC = new NEATCODEC();
}
return result;
}