defuzzifyCentroid method

double defuzzifyCentroid([ int samples = 10 ])

Defuzzifies the FLV using the "Centroid" method.

Implementation

double defuzzifyCentroid([int samples = 10 ]) {
	final fuzzySets = this.fuzzySets;
	final stepSize = ( maxRange - minRange ) / samples;
	double totalArea = 0;
	double sumOfMoments = 0;

	for ( int s = 1; s <= samples; s ++ ) {
		final sample = minRange + ( s * stepSize );

		for ( int i = 0, l = fuzzySets.length; i < l; i ++ ) {
			final fuzzySet = fuzzySets[ i ];
			final contribution = math.min( fuzzySet.degreeOfMembership, fuzzySet.computeDegreeOfMembership( sample ) );
			totalArea += contribution;
			sumOfMoments += ( sample * contribution );
		}
	}

	return ( totalArea == 0 ) ? 0 : ( sumOfMoments / totalArea );
}