// Testing basic funcionality of fuzzy sets
private void runFuzzySetTestButton_Click( object sender, EventArgs e )
{
ClearDataSeries( );
// create 2 fuzzy sets to represent the Cool and Warm temperatures
TrapezoidalFunction function1 = new TrapezoidalFunction( 13, 18, 23, 28 );
FuzzySet fsCool = new FuzzySet( "Cool", function1 );
TrapezoidalFunction function2 = new TrapezoidalFunction( 23, 28, 33, 38 );
FuzzySet fsWarm = new FuzzySet( "Warm", function2 );
// get membership of some points to the cool fuzzy set
double[,] coolValues = new double[20, 2];
for ( int i = 10; i < 30; i++ )
{
coolValues[i - 10, 0] = i;
coolValues[i - 10, 1] = fsCool.GetMembership( i );
}
// getting memberships of some points to the warm fuzzy set
double[,] warmValues = new double[20, 2];
for ( int i = 20; i < 40; i++ )
{
warmValues[i - 20, 0] = i;
warmValues[i - 20, 1] = fsWarm.GetMembership( i );
}
// plot membership to a chart
chart.UpdateDataSeries( "COOL", coolValues );
chart.UpdateDataSeries( "WARM", warmValues );
}
/// <summary>
/// Evaluates the fuzzy clause.
/// </summary>
///
/// <returns>Degree of membership [0..1] of the clause.</returns>
///
public float Evaluate( )
{
return(label.GetMembership(variable.NumericInput));
}
/// <summary>
/// Calculate the membership of a given value to a given label. Used to evaluate linguistics clauses like
/// "X IS A", where X is a value and A is a linguistic label.
/// </summary>
///
/// <param name="labelName">Label (fuzzy set) to evaluate value's membership.</param>
/// <param name="value">Value which label's membership will to be calculated.</param>
///
/// <returns>Degree of membership [0..1] of the value to the label (fuzzy set).</returns>
///
/// <exception cref="KeyNotFoundException">The label indicated in labelName was not found in the linguistic variable.</exception>
///
public float GetLabelMembership(string labelName, float value)
{
FuzzySet fs = labels[labelName];
return(fs.GetMembership(value));
}