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mcychan · Jun 20, 2024 · cbe38da · cbe38da
1 parent ab462be
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diff --git a/src/hk/edu/gaSchedule/algorithm/Dlba.java b/src/hk/edu/gaSchedule/algorithm/Dlba.java
@@ -32,6 +32,10 @@ public class Dlba<T extends Chromosome<T> > extends NsgaIII<T> {
 	public Dlba(T prototype, int numberOfCrossoverPoints, int mutationSize, float crossoverProbability, float mutationProbability)
 	{
 		super(prototype, numberOfCrossoverPoints, mutationSize, crossoverProbability, mutationProbability);
+
+		// there should be at least 5 chromosomes in population
+		if (_populationSize < 5)
+			_populationSize = 5;
 
 		_alpha = 0.9;
 		_pa = .25;

diff --git a/src/hk/edu/gaSchedule/algorithm/Fpa.java b/src/hk/edu/gaSchedule/algorithm/Fpa.java
@@ -28,6 +28,10 @@ public class Fpa<T extends Chromosome<T> > extends NsgaIII<T> {
 	public Fpa(T prototype, int numberOfCrossoverPoints, int mutationSize, float crossoverProbability, float mutationProbability)
 	{
 		super(prototype, numberOfCrossoverPoints, mutationSize, crossoverProbability, mutationProbability);
+
+		// there should be at least 5 chromosomes in population
+		if (_populationSize < 5)
+			_populationSize = 5;
 
 		_pa = .25;
 	}