cs-grammatical-evolution 1.0.4

dotnet add package cs-grammatical-evolution --version 1.0.4
NuGet\Install-Package cs-grammatical-evolution -Version 1.0.4
This command is intended to be used within the Package Manager Console in Visual Studio, as it uses the NuGet module's version of Install-Package.
<PackageReference Include="cs-grammatical-evolution" Version="1.0.4" />
For projects that support PackageReference, copy this XML node into the project file to reference the package.
paket add cs-grammatical-evolution --version 1.0.4
#r "nuget: cs-grammatical-evolution, 1.0.4"
#r directive can be used in F# Interactive and Polyglot Notebooks. Copy this into the interactive tool or source code of the script to reference the package.
// Install cs-grammatical-evolution as a Cake Addin
#addin nuget:?package=cs-grammatical-evolution&version=1.0.4

// Install cs-grammatical-evolution as a Cake Tool
#tool nuget:?package=cs-grammatical-evolution&version=1.0.4

cs-grammatical-evolution

Grammatical evolution implemented using C#

Usage

The sample code belows show how to use the Grammatical Evolution to solve the spiral classification problem:

class Program
{
	static DataTable LoadData(string filename)
	{
		DataTable table = new DataTable();
		table.Columns.Add("X");
		table.Columns.Add("Y");
		table.Columns.Add("Label");

		int line_count = 0;
		using (StreamReader reader = new StreamReader(filename))
		{
			string line = reader.ReadLine();
			int.TryParse(line, out line_count);

			while ((line = reader.ReadLine()) != null)
			{
				string[] elements = line.Split(new char[] { '\t' });

				double x, y;
				int label;
				double.TryParse(elements[0].Trim(), out x);
				double.TryParse(elements[1].Trim(), out y);
				int.TryParse(elements[2].Trim(), out label);

				table.Rows.Add(x, y, label);
			}
		}
		return table;
	}

	static void CreateGrammar(GEPop<GESolution> pop)
	{
		pop.GERuleSet.RemoveAllRules();

		//pop.GERuleSet.AddRule("<expr>", "<lbracket>", "<expr>", "<biop>", "<expr>", "<rbracket>");
		pop.GERuleSet.AddRule("<expr>", "<lbracket>", "<expr>", "<biop>", "<expr>", "<rbracket>");
		pop.GERuleSet.AddRule("<expr>", "<pre-op>", "<lbracket>", "<expr>", "<rbracket>");
		//pop.GERuleSet.AddRule("<expr>", "<pre-op-2>", "<lbracket>", "<expr>", "<comma>", "<expr>", "<rbracket>");
		pop.GERuleSet.AddRule("<expr>", "<var>");

		pop.GERuleSet.AddRule("<biop>", "+");
		pop.GERuleSet.AddRule("<biop>", "-");
		pop.GERuleSet.AddRule("<biop>", "/");
		pop.GERuleSet.AddRule("<biop>", "*");

		//pop.GERuleSet.AddRule("<comma>", ",");
		//pop.GERuleSet.AddRule("<pre-op-2>", "Pow");
		pop.GERuleSet.AddRule("<pre-op>", "Sin");
		//pop.GERuleSet.AddRule("<pre-op>", "Tan");
		pop.GERuleSet.AddRule("<pre-op>", "Cos");
		pop.GERuleSet.AddRule("<lbracket>", "(");
		pop.GERuleSet.AddRule("<rbracket>", ")");

		pop.GERuleSet.AddRule("<var>", "X");
		pop.GERuleSet.AddRule("<var>", "Y");
		pop.GERuleSet.AddRule("<var>", "C1");
	}

	static void CreateTerminalSet(GEPop<GESolution> pop)
	{
		pop.OperatorSet.AddOperator("+");
		pop.OperatorSet.AddOperator("-");
		pop.OperatorSet.AddOperator("/");
		pop.OperatorSet.AddOperator("*");
		pop.OperatorSet.AddOperator("Sin");
		pop.OperatorSet.AddOperator("Cos");
		pop.OperatorSet.AddOperator("(");
		pop.OperatorSet.AddOperator(")");
		//pop.OperatorSet.AddOperator("Tan");
		//pop.OperatorSet.AddOperator("Pow");

		pop.ConstantSet.AddConstant("C1", 8);

		pop.VariableSet.AddVariable("X");
		pop.VariableSet.AddVariable("Y");

		pop.BuildTerminalSet();
	}

	static void Main(string[] args)
	{
		DataTable table = LoadData("dataset.txt");

		GEConfig config = new GEConfig("GEConfig.xml");

		GEPop<GESolution> pop = new GEPop<GESolution>(config);

		CreateTerminalSet(pop);

		//User can load BNF grammar from file or create programmatic ally
		pop.GERuleSet.LoadGrammar("grammar.bnf");

		Console.WriteLine(pop.GERuleSet.ToString());

		//CreateGrammar(pop);

		//Xianshun: Say if you implement a operator named "Move(X, Y)",
		//Which returns a value 1 if X > Y otherwise 0
		//use the following code to enable this use-defined operator in the BNF
		/*
		pop.EvaluateFunction += (function_name, function_args) =>
			{
				if (function_name == "Move")
				{
					double X = Convert.ToDouble(function_args.Parameters[0].Evaluate());
					double Y = Convert.ToDouble(function_args.Parameters[1].Evaluate());
					if (X > Y)
					{
						function_args.Result = 1;
					}
					else
					{
						function_args.Result = 0;
					}
				}
			};
		 */

		pop.CreateFitnessCase += (index) =>
		{
			SpiralFitnessCase fitness_case = new SpiralFitnessCase();
			fitness_case.X = double.Parse(table.Rows[index]["X"].ToString());
			fitness_case.Y = double.Parse(table.Rows[index]["Y"].ToString());
			fitness_case.Label = int.Parse(table.Rows[index]["Label"].ToString());

			return fitness_case;
		};

		pop.GetFitnessCaseCount += () =>
		{
			return table.Rows.Count;
		};

		pop.EvaluateObjectiveForSolution += (fitness_cases, s, objective_index) =>
		{
			double fitness = 0;
			for (int i = 0; i < fitness_cases.Count; i++)
			{
				SpiralFitnessCase fitness_case = (SpiralFitnessCase)fitness_cases[i];
				int correct_y = fitness_case.Label;
				int computed_y = fitness_case.ComputedLabel;
				fitness += (correct_y == computed_y) ? 0 : 1;
			}

			return fitness;
		};


		pop.BreedInitialPopulation();


		while (!pop.IsTerminated)
		{
			pop.Evolve();
			Console.WriteLine("Spiral Classification Generation: {0}", pop.CurrentGeneration);
			Console.WriteLine("Global Fitness: {0}\tCurrent Fitness: {1}", pop.GlobalBestProgram.Fitness, pop.FindFittestProgramInCurrentGeneration().Fitness);
			Console.WriteLine("Global Best Solution:\n{0}", pop.GlobalBestProgram);
			//Console.WriteLine("Current Best Solution:\n{0}", pop.FindFittestProgramInCurrentGeneration());
		}

		Console.WriteLine(pop.GlobalBestProgram.ToString());
	}
}

The GEConfig.xml and its child configuration files will be automatically generated if they do not exist, otherwise the configuration will be loaded from the existing GEConfig.xml and its child configuration files.

Product Compatible and additional computed target framework versions.
.NET Framework net452 is compatible.  net46 was computed.  net461 was computed.  net462 was computed.  net463 was computed.  net47 was computed.  net471 was computed.  net472 was computed.  net48 was computed.  net481 was computed. 
Compatible target framework(s)
Included target framework(s) (in package)
Learn more about Target Frameworks and .NET Standard.

This package has no dependencies.

NuGet packages

This package is not used by any NuGet packages.

GitHub repositories

This package is not used by any popular GitHub repositories.

Version Downloads Last updated
1.0.4 1,312 12/3/2017
1.0.3 920 11/17/2017
1.0.2 968 11/1/2017
1.0.1 965 10/31/2017

Grammatical Evolution in .NET 4.5.2