diff options
Diffstat (limited to 'gi/posterior-regularisation/prjava/src/optimization/stopCriteria/NormalizedValueDifference.java')
-rw-r--r-- | gi/posterior-regularisation/prjava/src/optimization/stopCriteria/NormalizedValueDifference.java | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/gi/posterior-regularisation/prjava/src/optimization/stopCriteria/NormalizedValueDifference.java b/gi/posterior-regularisation/prjava/src/optimization/stopCriteria/NormalizedValueDifference.java new file mode 100644 index 00000000..6dbbc50d --- /dev/null +++ b/gi/posterior-regularisation/prjava/src/optimization/stopCriteria/NormalizedValueDifference.java @@ -0,0 +1,54 @@ +package optimization.stopCriteria; + +import optimization.gradientBasedMethods.Objective; +import optimization.util.MathUtils; + +public class NormalizedValueDifference implements StopingCriteria{ + + /** + * Stop if the different between values is smaller than a treshold + */ + protected double valueConvergenceValue=0.01; + protected double previousValue = Double.NaN; + protected double currentValue = Double.NaN; + + public NormalizedValueDifference(double valueConvergenceValue){ + this.valueConvergenceValue = valueConvergenceValue; + } + + public void reset(){ + previousValue = Double.NaN; + currentValue = Double.NaN; + } + + + public boolean stopOptimization(Objective obj){ + if(Double.isNaN(currentValue)){ + currentValue = obj.getValue(); + return false; + }else { + previousValue = currentValue; + currentValue = obj.getValue(); + if(previousValue != 0){ + double valueDiff = Math.abs(previousValue - currentValue)/Math.abs(previousValue); + if( valueDiff < valueConvergenceValue){ + System.out.println("Leaving different in values is to small: Prev " + + (previousValue/previousValue) + " Curr: " + (currentValue/previousValue) + + " diff: " + valueDiff); + return true; + } + }else{ + double valueDiff = Math.abs(previousValue - currentValue); + if( valueDiff < valueConvergenceValue){ + System.out.println("Leaving different in values is to small: Prev " + + (previousValue) + " Curr: " + (currentValue) + + " diff: " + valueDiff); + return true; + } + } + + return false; + } + + } +} |