private AlpsGeneticAlgorithm CreateAlpsGaSymRegSample()
{
AlpsGeneticAlgorithm alpsGa = new AlpsGeneticAlgorithm();
#region Problem Configuration
var provider = new VladislavlevaInstanceProvider();
var instance = provider.GetDataDescriptors().Single(x => x.Name.StartsWith("Vladislavleva-5 F5"));
var symbRegProblem = new SymbolicRegressionSingleObjectiveProblem();
symbRegProblem.Load(provider.LoadData(instance));
symbRegProblem.MaximumSymbolicExpressionTreeDepth.Value = 35;
symbRegProblem.MaximumSymbolicExpressionTreeLength.Value = 35;
var grammar = (TypeCoherentExpressionGrammar)symbRegProblem.SymbolicExpressionTreeGrammar;
grammar.Symbols.OfType <Exponential>().Single().Enabled = false;
grammar.Symbols.OfType <Logarithm>().Single().Enabled = false;
#endregion
#region Algorithm Configuration
alpsGa.Name = "ALPS Genetic Programming - Symbolic Regression";
alpsGa.Description = "An ALPS-GP to solve a symbolic regression problem (Vladislavleva-5 dataset)";
alpsGa.Problem = symbRegProblem;
SamplesUtils.ConfigureAlpsGeneticAlgorithmParameters <GeneralizedRankSelector, SubtreeCrossover, MultiSymbolicExpressionTreeManipulator>(alpsGa,
numberOfLayers: 1000,
popSize: 100,
mutationRate: 0.25,
elites: 1,
plusSelection: false,
agingScheme: AgingScheme.Polynomial,
ageGap: 15,
ageInheritance: 1.0,
maxGens: 500);
#endregion
return(alpsGa);
}
public void GetVladislavlevaInstanceTest()
{
var target = new VladislavlevaInstanceProvider();
StringBuilder erroneousInstances = new StringBuilder();
int count = 0;
foreach (var id in target.GetDataDescriptors())
{
try {
target.LoadData(id);
} catch (Exception ex) {
erroneousInstances.AppendLine(id.Name + ": " + ex.Message);
}
count++;
}
Assert.IsTrue(count > 0, "No problem instances were found.");
Assert.IsTrue(erroneousInstances.Length == 0, "Some instances could not be parsed: " + Environment.NewLine + erroneousInstances.ToString());
}
public void GetVladislavlevaInstanceTest() {
var target = new VladislavlevaInstanceProvider();
StringBuilder erroneousInstances = new StringBuilder();
int count = 0;
foreach (var id in target.GetDataDescriptors()) {
try {
target.LoadData(id);
} catch (Exception ex) {
erroneousInstances.AppendLine(id.Name + ": " + ex.Message);
}
count++;
}
Assert.IsTrue(count > 0, "No problem instances were found.");
Assert.IsTrue(erroneousInstances.Length == 0, "Some instances could not be parsed: " + Environment.NewLine + erroneousInstances.ToString());
}
