public void AddRegister(LGPRegister register, double weight = 1)
{
mRegisters.Add(new KeyValuePair <LGPRegister, double>(register, weight));
register.mRegisterIndex = mRegisters.Count - 1;
register.mIsConstant = false;
mWeightSum += weight;
}
public LGPRegister FindRandomRegister(LGPRegister current_register = null)
{
for (int attempts = 0; attempts < 10; attempts++)
{
double r = mWeightSum * Statistics.DistributionModel.GetUniform();
double current_sum = 0;
foreach (KeyValuePair <LGPRegister, double> point in mRegisters)
{
current_sum += point.Value;
if (current_sum >= r)
{
if (point.Key != current_register)
{
return(point.Key);
}
else
{
break;
}
}
}
}
return(current_register);
}
public void AddConstant(double value, double weight)
{
LGPRegister register = new LGPRegister();
register.Value = value;
AddRegister(register);
}
public virtual void Create()
{
mOperator = mProgram.OperatorSet.FindRandomOperator();
double p_const = 0.5;
double r = Statistics.DistributionModel.GetUniform();
if (r < p_const)
{
mOperand1 = mProgram.ConstantSet.FindRandomRegister();
}
else
{
mOperand1 = mProgram.RegisterSet.FindRandomRegister();
}
if (mOperand1.IsConstant)
{
mOperand2 = mProgram.RegisterSet.FindRandomRegister();
}
else
{
r = Statistics.DistributionModel.GetUniform();
if (r < p_const)
{
mOperand2 = mProgram.ConstantSet.FindRandomRegister();
}
else
{
mOperand2 = mProgram.RegisterSet.FindRandomRegister();
}
}
mDestinationRegister = mProgram.RegisterSet.FindRandomRegister();
}
public LGPRegister Clone()
{
LGPRegister clone = new LGPRegister();
clone.mRegisterIndex = mRegisterIndex;
clone.mIsConstant = mIsConstant;
clone.mValue = mValue;
return(clone);
}
public virtual void MutateRegister(double p_const = 0.5)
{
double r = Statistics.DistributionModel.GetUniform();
if (r < 0.5)
{
mDestinationRegister = mProgram.RegisterSet.FindRandomRegister(mDestinationRegister);
}
else
{
r = Statistics.DistributionModel.GetUniform();
LGPRegister arg1, arg2;
if (r < 0.5)
{
arg1 = mOperand1;
arg2 = mOperand2;
}
else
{
arg1 = mOperand2;
arg2 = mOperand1;
}
if (arg2.IsConstant)
{
arg1 = mProgram.RegisterSet.FindRandomRegister();
}
else
{
r = Statistics.DistributionModel.GetUniform();
if (r < p_const)
{
arg1 = mProgram.ConstantSet.FindRandomRegister();
}
else
{
arg1 = mProgram.RegisterSet.FindRandomRegister();
}
}
mOperand1 = arg1;
mOperand2 = arg2;
}
}
public abstract OperatorExecutionStatus Execute(LGPRegister operand1, LGPRegister operand2, LGPRegister destination_register);
