//
private double Centroid(List<FuzzyNumber> nums, LingVariable variable)
{
double stepN = 17;
double start = variable.Range[0];
double end = variable.Range[1];
double step = (end - start) / (stepN - 1);
double uppersum = 0;
double lowersum = 0;
for (int i = 0; i < nums.Count; i++)
{
MembershipFunction mf = variable.getMFbyName(nums[i].MembershipName);
for (double j = start; j < end; j = step + j)
{
double value = mf.getOutput(j);
if (value > 0)
{
if (value < nums[i].FuzzyValue)
{
uppersum = value * j + uppersum;
lowersum = value + lowersum;
}
else
{
uppersum = nums[i].FuzzyValue * j + uppersum;
lowersum = nums[i].FuzzyValue + lowersum;
}
}
}
}
return (uppersum / lowersum);
}
public List<FuzzyNumber> Fuzzification(double value, LingVariable variable)
{
List<FuzzyNumber> set = new List<FuzzyNumber>();
List<MembershipFunction> MFs = variable.MFs;
for (int i = 0; i < variable.MFs.Count; i++)
{
double v = MFs[i].getOutput(value);
if (v > 0)
{
set.Add(new FuzzyNumber(MFs[i].Name, v));
}
}
return set;
}
public double DeFuzzification(List<FuzzySet> Sets, LingVariable variable)
{
double value = 0;
for (int i = 0; i < Sets.Count; i++)
{
if (Sets[i].Variable == variable.Name)
{
if (configuration.DefuzzificationType == DefuzzifcationType.ModifiedHeight)
{
value = MaxHeightDeFuzzifcation(Sets[i].Set, variable);
}
else if (configuration.DefuzzificationType == DefuzzifcationType.Centroid)
{
value = Centroid(Sets[i].Set, variable);
}
}
}
return value;
}
private double MaxHeightDeFuzzifcation(List<FuzzyNumber> nums, LingVariable variable)
{
double lowvalue = 0;
double highvalue = 0;
for (int i = 0; i < nums.Count; i++)
{
MembershipFunction mf = variable.getMFbyName(nums[i].MembershipName);
highvalue = ((mf.CenterOfMass * getImplication(nums[i].FuzzyValue, mf.getOutput(mf.CenterOfMass))) / (mf.Spread * mf.Spread)) + highvalue;
lowvalue = (getImplication(nums[i].FuzzyValue, mf.getOutput(mf.CenterOfMass)) / (mf.Spread * mf.Spread)) + lowvalue;
}
return (highvalue / lowvalue);
}
