public static IFuzzySet Lambda(IDomain domain, params double[] points)
{
double[] memberships = new double[domain.GetCardinality()];
for (int index = 0; index < domain.GetCardinality(); index++)
{
double value = (double)domain.ElementAt(index)[0];
if (value <= points[0])
{
memberships[index] = 0;
}
else if (value >= points[2])
{
memberships[index] = 0;
}
else if (value > points[0] && value < points[1])
{
memberships[index] = (value - points[0]) / (points[1] - points[0]);
}
else
{
memberships[index] = (points[2] - value) / (points[2] - points[1]);
}
}
return(FuzzySetFactory.CreateFuzzySet(domain, memberships));
}
public IFuzzySet Calculate(IFuzzySet set)
{
IList <double> memberships = new List <double>();
for (int i = 0; i < set.GetDomain().GetCardinality(); i++)
{
double value = set.GetMembershipFor(set.GetDomain().ElementAt(i));
memberships.Add(1 - value);
}
return(FuzzySetFactory.CreateFuzzySet(set.GetDomain(), memberships));
}
public IFuzzySet Calculate(IFuzzySet first, IFuzzySet second)
{
IList <double> memberships = new List <double>();
IDomain domain = DomainFactory.CreateDomain(new IDomain[] { first.GetDomain(), second.GetDomain() });
IFuzzySet firstCyl = first.CylindricalExtension(domain);
IFuzzySet secondCyl = second.CylindricalExtension(domain);
for (int i = 0; i < domain.GetCardinality(); i++)
{
double value1 = firstCyl.GetMembershipFor(domain.ElementAt(i));
double value2 = secondCyl.GetMembershipFor(domain.ElementAt(i));
memberships.Add(value1 * value2);
}
return(FuzzySetFactory.CreateFuzzySet(domain, memberships));
}
public IFuzzySet Calculate(IFuzzySet first, IFuzzySet second)
{
if (!first.GetDomain().Equals(second.GetDomain()))
{
throw new ApplicationException("Domains are not the same.");
}
IList <double> memberships = new List <double>();
IDomain domain = first.GetDomain();
for (int i = 0; i < domain.GetCardinality(); i++)
{
double value1 = first.GetMembershipFor(domain.ElementAt(i));
double value2 = second.GetMembershipFor(domain.ElementAt(i));
memberships.Add(value1 + value2 - value1 * value2);
}
return(FuzzySetFactory.CreateFuzzySet(domain, memberships));
}
