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package optimization.stopCriteria;
import optimization.gradientBasedMethods.Objective;
import optimization.util.MathUtils;
public class GradientL2Norm implements StopingCriteria{
/**
* Stop if gradientNorm/(originalGradientNorm) smaller
* than gradientConvergenceValue
*/
protected double gradientConvergenceValue;
public GradientL2Norm(double gradientConvergenceValue){
this.gradientConvergenceValue = gradientConvergenceValue;
}
public void reset(){}
public boolean stopOptimization(Objective obj){
double norm = MathUtils.L2Norm(obj.gradient);
if(norm < gradientConvergenceValue){
System.out.println("Gradient norm below treshold");
return true;
}
return false;
}
}
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