public override Individual mutation(Individual individual)
{
Random rand = new Random();
char currentChar;
char newChar;
for (int i = 0; i < individual.getLength(); i++)
{
if (rand.NextDouble() <= MUTATION_PROB)
{
currentChar = individual.getGene(i);
if (rand.Next(2) == 0)
{
newChar = (char)(currentChar - 1);
}
else
{
newChar = (char)(currentChar + 1);
}
if (newChar - LOWER_BOUND >= ASCII_RANGE)
{
newChar = (char)LOWER_BOUND;
}
else
{
newChar = (char)UPPER_BOUND;
}
}
}
return(individual);
}
public override double calculateFitness(Individual individual, double fitness)
{
for (int i = 0; i < individual.getLength(); i++)
{
if (individual.getGene(i) == '1')
{
fitness++;
}
}
return(fitness);
}
public override Individual mutation(Individual individual)
{
Random rand = new Random();
char currentChar;
char newChar;
int index = 0;
for (int i = 0; i < individual.getLength(); i++)
{
if (rand.NextDouble() <= MUTATION_PROB)
{
currentChar = individual.getGene(i);
for (int j = 0; j < VALUES.Length; j++)
{
if (currentChar == VALUES[j])
{
index = j;
break;
}
}
if (rand.Next(2) == 0)
{
index -= 1;
}
else
{
index += 1;
}
if (index >= VALUES.Length)
{
index = 0;
}
else
{
index = VALUES.Length - 1;
}
newChar = VALUES[index];
individual.setGene(i, newChar);
}
}
return(individual);
}
public override Individual mutation(Individual individual)
{
Random rand = new Random();
for (int i = 0; i < individual.getLength(); i++)
{
if (rand.NextDouble() <= MUTATION_PROB)
{
if (individual.getGene(i) == '0')
{
individual.setGene(i, '1');
}
else if (individual.getGene(i) == '0')
{
individual.setGene(i, '0');
}
}
}
return(individual);
}
private bool checkOperatorPair(Individual values)
{
string prevChar;
string currentChar;
for (int i = 0; i < values.getLength(); i++)
{
prevChar = values.getGene(0).ToString();
for (int j = 0; j < totalLength; j++)
{
currentChar = values.getGene(j).ToString();
if (isOperator(prevChar) == true && isOperator(currentChar) == true)
{
return(false);
}
prevChar = currentChar;
}
}
return(true);
}
public override double calculateFitness(Individual individual, double fitness)
{
char currentChar;
int difference = 0;
for (int i = 0; i < individual.getLength(); i++)
{
currentChar = individual.getGene(i);
difference = Math.Abs(target[i] - currentChar);
if (difference >= ASCII_RANGE / 2)
{
if (difference == ASCII_RANGE)
{
difference = 1;
}
else
{
difference = ASCII_RANGE - difference;
}
fitness -= difference;
}
}
return(fitness);
}
private bool checkEnds(Individual values)
{
for (int i = 0; i < OPERATORS.Length; i++)
{
if (isOperator(values.getGene(0).ToString()) || isOperator(values.getGene(values.getLength() - 1).ToString()))
{
return(false);
}
}
return(true);
}