diff options
Diffstat (limited to 'gi/posterior-regularisation/prjava/src/optimization/linesearch/WolfeConditions.java')
-rw-r--r-- | gi/posterior-regularisation/prjava/src/optimization/linesearch/WolfeConditions.java | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/gi/posterior-regularisation/prjava/src/optimization/linesearch/WolfeConditions.java b/gi/posterior-regularisation/prjava/src/optimization/linesearch/WolfeConditions.java new file mode 100644 index 00000000..dcc704eb --- /dev/null +++ b/gi/posterior-regularisation/prjava/src/optimization/linesearch/WolfeConditions.java @@ -0,0 +1,45 @@ +package optimization.linesearch; + + +public class WolfeConditions { + + /** + * Sufficient Increase number. Default constant + */ + + + /** + * Value for suficient curvature: + * 0.9 - For newton and quase netwon methods + * 0.1 - Non linear conhugate gradient + */ + + int debugLevel = 0; + public void setDebugLevel(int level){ + debugLevel = level; + } + + public static boolean suficientDecrease(DifferentiableLineSearchObjective o, double c1){ + double value = o.getOriginalValue()+c1*o.getAlpha()*o.getInitialGradient(); +// System.out.println("Sufficient Decrease original "+value+" new "+ o.getCurrentValue()); + return o.getCurrentValue() <= value; + } + + + + + public static boolean sufficientCurvature(DifferentiableLineSearchObjective o, double c1, double c2){ +// if(debugLevel >= 2){ +// double current = Math.abs(o.getCurrentGradient()); +// double orig = -c2*o.getInitialGradient(); +// if(current <= orig){ +// return true; +// }else{ +// System.out.println("Not satistfying curvature condition curvature " + current + " wants " + orig); +// return false; +// } +// } + return Math.abs(o.getCurrentGradient()) <= -c2*o.getInitialGradient(); + } + +} |