MutatePerturb.performOperation calculation is not correct #148

jeffheaton · jeffheaton · commit 9de5f9b55e14 · 2014-01-01T07:47:19.000-06:00
diff --git a/src/main/java/org/encog/ml/genetic/mutate/MutatePerturb.java b/src/main/java/org/encog/ml/genetic/mutate/MutatePerturb.java
@@ -60,7 +60,7 @@ public void performOperation(Random rnd, Genome[] parents, int parentIndex,
 		
 		for(int i=0;i<parent.size();i++) {
 			double value = parent.getData()[i];
-			value += (perturbAmount - (rnd.nextDouble() * perturbAmount * 2));
+			value += value * (perturbAmount - (rnd.nextDouble() * perturbAmount * 2));
 			child.getData()[i] = value;
 		}
 	}

Original file line number	Diff line number	Diff line change
`@@ -60,7 +60,7 @@ public void performOperation(Random rnd, Genome[] parents, int parentIndex,`
`60`	`60`
`61`	`61`	`for(int i=0;i<parent.size();i++) {`
`62`	`62`	`double value = parent.getData()[i];`
`63`		`- value += (perturbAmount - (rnd.nextDouble() * perturbAmount * 2));`
	`63`	`+ value += value * (perturbAmount - (rnd.nextDouble() * perturbAmount * 2));`
`64`	`64`	`child.getData()[i] = value;`
`65`	`65`	`}`
`66`	`66`	`}`