private void OnAnswerFound(EF_Equation equation, EventArgs e)
{
if (AnswerFound != null)
{
AnswerFound(this, equation, e);
}
}
public void MutateEquation(ref EF_Equation equation, dynamic maxMutation, dynamic minMutation)
{
//Maybe limit mutations here
int mutations = RandomGenerator.Instance.Random.Next(1, equation.Operators.Count + equation.Variables.Count + 2);
equation.Mutate(maxMutation, minMutation, mutations);
}
private bool foundAnswer(EF_Equation equation)
{
if (Math.Abs(Answer - EquationCalculator.Instance.ComputeEquation(equation)) <= acceptableCost)
{
return(true);
}
return(false);
}
private void initializePopulation()
{
for (int i = 0; i < populationSize; i++)
{
EF_Equation equation = EquationMaker.Instance.MakeEquation(inputs, type, maxValue, minValue);
Equations.Add(equation);
//Console.Out.WriteLine(equation.PrettyName);
}
this.PopulationCount = 1;
}
private void AnswerFound(object sender, EF_Equation equation, EventArgs e)
{
lockFunctions = false;
button_Step.Enabled = true;
button_StepBy.Enabled = true;
button_Stop.Enabled = true;
enableButtons();
displayPopulationSettings();
label_PopCounter.Text = "Answer found on " + solutionFinder.PopulationCount;
Console.Out.WriteLine("Value = " + EquationCalculator.Instance.ComputeEquation(equation));
textBox_Solution.Text = equation.PrettyName;
newSolution = true;
}
private int compareEquations(EF_Equation equationOne, EF_Equation equationTwo)
{
//smaller cost is best
if (equationOne == null)
{
if (equationTwo == null) //they are equal
{
return(0);
}
else //pointOne is null and pointTwo is not null. PointTwo is greater
{
return(1);
}
}
else
{
//If x is not null
if (equationTwo == null) //y is null, x is greater
{
return(-1);
}
else
{
dynamic cost_one = cost(equationOne);
dynamic cost_two = cost(equationTwo);
if (cost_one > cost_two) // lower cost is better
{
return(1); //pointTwo is better
}
else if (cost_two > cost_one)
{
return(-1); //pointOne is better
}
else // they are the same
{
return(0);
}
}
}
}
private dynamic cost(EF_Equation equation)
{
dynamic val = EquationCalculator.Instance.ComputeEquation(equation);
dynamic cost = 0;
if (Math.Abs(val) > Math.Abs(Answer))
{
cost = (1 - val / Answer);
}
else
{
cost = (1 - Answer / val);
}
if (Math.Abs(val) < 1.0)
{
return(Math.Abs(cost / val));
}
else
{
return(Math.Abs(cost * val));
}
}
private void performStep()
{
if (Equations.Count <= 0)
{
return;
}
Equations.Sort(compareEquations);
if (foundAnswer(Equations[0]))
{
//answer found
OnAnswerFound(Equations[0], null);
return;
}
else
{
for (int i = Equations.Count / 2, parents = 0; i < Equations.Count; i += 2, parents += 2)
{
//Console.Out.WriteLine("i = " + i + " parents = " + parents);
Tuple <EF_Equation, EF_Equation> newEquations = EquationMaker.Instance.MakeChildren(Equations[parents], Equations[parents + 1]);
Equations[i] = newEquations.Item1;
Equations[i + 1] = newEquations.Item2;
}
Equations.Sort(compareEquations);
//increment population count
PopulationCount++;
if (foundAnswer(Equations[0]))
{
//answer found
OnAnswerFound(Equations[0], null);
return;
}
do
{
int index = RandomGenerator.Instance.Random.Next(1, Equations.Count);
dynamic maxMutationRate = Math.Abs(RandomGenerator.Instance.Random.NextDouble() * mutationRate);
dynamic minMutationRate = maxMutationRate * -1;
EF_Equation mutateMe = Equations[index];
EquationMaker.Instance.MutateEquation(ref mutateMe, maxMutationRate, minMutationRate);
Equations[index] = mutateMe;
} while (mutationRate-- > 0);
Equations.Sort(compareEquations);
//for (int i = 0; i < Equations.Count; i++)
// Console.Out.WriteLine("Cost = " + cost(Equations[i]) + " Value = " + EquationCalculator.Instance.ComputeEquation(Equations[i]));
if (foundAnswer(Equations[0]))
{
//answer found
OnAnswerFound(Equations[0], null);
return;
}
//Console.Out.WriteLine(" Best Computed Value = " + EquationCalculator.Instance.ComputeEquation(Equations[0]));
//Console.Out.WriteLine("Best cost = " + cost(Equations[0]));
}
}
private void initializePopulationWithSeed(EF_Equation seed)
{
}
public SolutionFinder(Dictionary <char, dynamic> inputs, dynamic output, dynamic acceptableCost, dynamic mutationRate, int populationSize, EquationType type, dynamic maxValue, dynamic minValue, EF_Equation seed)
{
fillOut(inputs, output, acceptableCost, mutationRate, populationSize, type, maxValue, minValue);
this.seed = seed;
initializePopulationWithSeed(this.seed);
}
public dynamic ComputeEquation(EF_Equation equation)
{
//DataTable computeTable = new DataTable();
//return Convert.ToDouble(computeTable.Compute(equation.ToString(), null).ToString());
if (equation.Variables.Count == 1)
{
return(equation.Variables[0].ComputedValue);
}
dynamic val = 0;
List <dynamic> variableList = new List <dynamic>();
List <EF_Operator> operatorList = new List <EF_Operator>();
for (int i = 0; i < equation.Variables.Count; i++)
{
variableList.Add(equation.Variables[i].ComputedValue);
}
for (int i = 0, x = 0; i < equation.Operators.Count; i++, x = x + 2)
{
switch (equation.Operators[i].Operator)
{
case EF_Operand.Add: operatorList.Add(equation.Operators[i]); break;
case EF_Operand.Subtract: operatorList.Add(equation.Operators[i]); break;
case EF_Operand.Multiply:
dynamic val_temp = 0;
val_temp = computeVariables(variableList[x], variableList[x + 1], equation.Operators[i]);
variableList[x] = val_temp;
variableList.RemoveAt(x + 1);
x--;
break;
case EF_Operand.Divide:
dynamic val_temp2 = 0;
val_temp2 = computeVariables(variableList[x], variableList[x + 1], equation.Operators[i]);
variableList[x] = val_temp2;
variableList.RemoveAt(x + 1);
x--;
break;
default: break;
}
}
for (int i = 0, x = 0; i < operatorList.Count; i++, x = x + 2)
{
switch (operatorList[i].Operator)
{
case EF_Operand.Add:
dynamic val_temp = 0;
val_temp = computeVariables(variableList[x], variableList[x + 1], operatorList[i]);
variableList[x] = val_temp;
variableList.RemoveAt(x + 1);
x--;
break;
case EF_Operand.Subtract:
dynamic val_temp2 = 0;
val_temp2 = computeVariables(variableList[x], variableList[x + 1], operatorList[i]);
variableList[x] = val_temp2;
variableList.RemoveAt(x + 1);
x--;
break;
default: break;
}
}
return(variableList[0]);
}
public Tuple <EF_Equation, EF_Equation> MakeChildren(EF_Equation parent1, EF_Equation parent2)
{
VariableType varType;
if (parent1.EquationType == EquationType.Int)
{
varType = VariableType.Int;
}
else
{
varType = VariableType.Double;
}
EquationType parent1Copy_eq = new EquationType();
EquationType parent2Copy_eq = new EquationType();
if (parent1.EquationType.Equals(EquationType.Double))
{
parent1Copy_eq = EquationType.Double;
parent2Copy_eq = EquationType.Double;
}
else
{
parent1Copy_eq = EquationType.Int;
parent2Copy_eq = EquationType.Int;
}
List <EF_Variable> parent1Copy_variables = new List <EF_Variable>();
List <EF_Variable> parent2Copy_variables = new List <EF_Variable>();
foreach (EF_Variable variable in parent1.Variables)
{
char symbol = variable.Symbol;
dynamic value = variable.Value;
dynamic coeff = variable.CoEfficient;
dynamic power = variable.Power;
EF_Variable newVariable = new EF_Variable(symbol, value, coeff, power, varType);
parent1Copy_variables.Add(newVariable);
}
foreach (EF_Variable variable in parent2.Variables)
{
char symbol = variable.Symbol;
dynamic value = variable.Value;
dynamic coeff = variable.CoEfficient;
dynamic power = variable.Power;
EF_Variable newVariable = new EF_Variable(symbol, value, coeff, power, varType);
parent2Copy_variables.Add(newVariable);
}
List <EF_Operator> parent1Copy_operators = new List <EF_Operator>();
List <EF_Operator> parent2Copy_operators = new List <EF_Operator>();
foreach (EF_Operator oper in parent1.Operators)
{
EF_Operand op = new EF_Operand();
if (oper.Operator == EF_Operand.Add)
{
op = EF_Operand.Add;
}
else if (oper.Operator == EF_Operand.Subtract)
{
op = EF_Operand.Subtract;
}
else if (oper.Operator == EF_Operand.Multiply)
{
op = EF_Operand.Multiply;
}
else
{
op = EF_Operand.Divide;
}
EF_Operator opera = new EF_Operator(op);
parent1Copy_operators.Add(oper);
}
foreach (EF_Operator oper in parent2.Operators)
{
EF_Operand op = new EF_Operand();
if (oper.Operator == EF_Operand.Add)
{
op = EF_Operand.Add;
}
else if (oper.Operator == EF_Operand.Subtract)
{
op = EF_Operand.Subtract;
}
else if (oper.Operator == EF_Operand.Multiply)
{
op = EF_Operand.Multiply;
}
else
{
op = EF_Operand.Divide;
}
EF_Operator opera = new EF_Operator(op);
parent2Copy_operators.Add(oper);
}
EF_Equation child1 = new EF_Equation(parent1Copy_eq, parent2Copy_variables, parent1Copy_operators);
EF_Equation child2 = new EF_Equation(parent2Copy_eq, parent1Copy_variables, parent2Copy_operators);
return(Tuple.Create(child1, child2));
}
