Changeset 12407 for branches/TerminationCriteria/HeuristicLab.Algorithms.OffspringSelectionGeneticAlgorithm/3.3

Timestamp:

05/28/15 09:47:23 (9 years ago)

Author:

pfleck

Message:

#2027
Inverted the conditions to check the continue criteria instead of termination criteria.
Conditions are then specified more naturally: "while generations < max" instead of "break if generations > min".
If any Continue-Check returns false, the algorithm will be terminated.

The naming "Terminator" has to be discussed because it suggest to specify the criteria when the algorithm should stop, instead of continue.

File:

• branches/TerminationCriteria/HeuristicLab.Algorithms.OffspringSelectionGeneticAlgorithm/3.3/OffspringSelectionGeneticAlgorithm.cs (modified) (2 diffs)

branches/TerminationCriteria/HeuristicLab.Algorithms.OffspringSelectionGeneticAlgorithm/3.3/OffspringSelectionGeneticAlgorithm.cs

@@ -351 +351 @@
       UpdateAnalyzers();
 
-      generationsTerminator = new ComparisonTerminator<IntValue>("Generations", ComparisonType.GreaterOrEqual, new IntValue(50)) { Name = "Generations" };
-      evaluatedSolutionsTerminator = new ComparisonTerminator<IntValue>("EvaluatedSolutions", ComparisonType.GreaterOrEqual, new IntValue(int.MaxValue)) { Name = "Evaluations" };
-      selectionPressureTerminator = new ComparisonTerminator<DoubleValue>("SelectionPressure", ComparisonType.GreaterOrEqual, new DoubleValue(200)) { Name = "Selection Pressure" };
-      qualityTerminator = new ComparisonTerminator<DoubleValue>(threshold: new DoubleValue()) { Name = "Quality" };
+      generationsTerminator = new ComparisonTerminator<IntValue>("Generations", ComparisonType.Less, new IntValue(50)) { Name = "Generations" };
+      evaluatedSolutionsTerminator = new ComparisonTerminator<IntValue>("EvaluatedSolutions", ComparisonType.Less, new IntValue(int.MaxValue)) { Name = "Evaluations" };
+      selectionPressureTerminator = new ComparisonTerminator<DoubleValue>("SelectionPressure", ComparisonType.Less, new DoubleValue(200)) { Name = "Selection Pressure" };
+      qualityTerminator = new ComparisonTerminator<DoubleValue>(new DoubleValue()) { Name = "Quality" };
       executionTimeTerminator = new ExecutionTimeTerminator(this, new TimeSpanValue(TimeSpan.FromMinutes(5))) { Name = "Execution Time" };
       ParameterizeTerminators();
@@ -508 +508 @@
         if (maximizationParameter != null) {
           bool maximization = maximizationParameter.Value.Value;
-          qualityTerminator.Comparison = maximization ? ComparisonType.GreaterOrEqual : ComparisonType.LessOrEqual;
-          qualityTerminator.Threshold.Value = maximization ? double.MaxValue : double.MinValue;
+          qualityTerminator.Comparison = maximization ? ComparisonType.Less : ComparisonType.Greater;
+          qualityTerminator.Threshold.Value = maximization ? double.MinValue : double.MaxValue;
         }
       }