#region License Information
/* HeuristicLab
* Copyright (C) 2002-2011 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
*
* This file is part of HeuristicLab.
*
* HeuristicLab is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* HeuristicLab is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with HeuristicLab. If not, see .
*/
#endregion
using System;
using HeuristicLab.Common;
using HeuristicLab.Core;
using HeuristicLab.Data;
using HeuristicLab.Operators;
using HeuristicLab.Optimization;
using HeuristicLab.Optimization.Operators;
using HeuristicLab.Parameters;
using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
using HeuristicLab.Problems.TestFunctions;
using HeuristicLab.Random;
namespace HeuristicLab.Algorithms.GradientDescent {
///
/// Linear regression data analysis algorithm.
///
[Item("Levenberg Marquardt", "Levenberg Marquardt real vector optimization algorithm.")]
[Creatable("Algorithms")]
[StorableClass]
public sealed class LevenbergMarquardt : EngineAlgorithm, IStorableContent {
public string Filename { get; set; }
public override Type ProblemType {
get { return typeof(SingleObjectiveTestFunctionProblem); }
}
public new SingleObjectiveTestFunctionProblem Problem {
get { return (SingleObjectiveTestFunctionProblem)base.Problem; }
set { base.Problem = value; }
}
private ValueParameter SeedParameter {
get { return (ValueParameter)Parameters["Seed"]; }
}
private ValueParameter SetSeedRandomlyParameter {
get { return (ValueParameter)Parameters["SetSeedRandomly"]; }
}
public IntValue Seed {
get { return SeedParameter.Value; }
set { SeedParameter.Value = value; }
}
public BoolValue SetSeedRandomly {
get { return SetSeedRandomlyParameter.Value; }
set { SetSeedRandomlyParameter.Value = value; }
}
private RandomCreator RandomCreator {
get { return (RandomCreator)OperatorGraph.InitialOperator; }
}
private SolutionsCreator SolutionsCreator {
get { return (SolutionsCreator)RandomCreator.Successor; }
}
#region storing and cloning
[StorableConstructor]
private LevenbergMarquardt(bool deserializing) : base(deserializing) { }
private LevenbergMarquardt(LevenbergMarquardt original, Cloner cloner)
: base(original, cloner) {
Initialize();
}
public override IDeepCloneable Clone(Cloner cloner) {
return new LevenbergMarquardt(this, cloner);
}
#endregion
public LevenbergMarquardt()
: base() {
Parameters.Add(new ValueParameter("Seed", "The random seed used to initialize the new pseudo random number generator.", new IntValue(0)));
Parameters.Add(new ValueParameter("SetSeedRandomly", "True if the random seed should be set to a random value, otherwise false.", new BoolValue(true)));
RandomCreator randomCreator = new RandomCreator();
SolutionsCreator solutionsCreator = new SolutionsCreator();
UniformSubScopesProcessor subscopesProcessor = new UniformSubScopesProcessor();
LevenbergMarquardtMove moveCreator = new LevenbergMarquardtMove();
OperatorGraph.InitialOperator = randomCreator;
randomCreator.RandomParameter.ActualName = "Random";
randomCreator.SeedParameter.ActualName = SeedParameter.Name;
randomCreator.SeedParameter.Value = null;
randomCreator.SetSeedRandomlyParameter.ActualName = SetSeedRandomlyParameter.Name;
randomCreator.SetSeedRandomlyParameter.Value = null;
randomCreator.Successor = solutionsCreator;
solutionsCreator.NumberOfSolutionsParameter.Value = new IntValue(1);
solutionsCreator.Successor = subscopesProcessor;
subscopesProcessor.Operator = moveCreator;
}
public override void Prepare() {
if (Problem != null) base.Prepare();
}
protected override void Problem_Reset(object sender, EventArgs e) {
base.Problem_Reset(sender, e);
}
protected override void OnProblemChanged() {
Problem.Reset += new EventHandler(Problem_Reset);
base.OnProblemChanged();
}
protected override void Problem_SolutionCreatorChanged(object sender, EventArgs e) {
SolutionsCreator.NumberOfSolutionsParameter.Value = new IntValue(1);
base.Problem_SolutionCreatorChanged(sender, e);
}
private void Initialize() {
}
}
}