From bdea91300c85539ab7153ccba58689612f66bb4d Mon Sep 17 00:00:00 2001 From: desaicwtf Date: Fri, 9 Jul 2010 16:59:55 +0000 Subject: add optimization library source code git-svn-id: https://ws10smt.googlecode.com/svn/trunk@204 ec762483-ff6d-05da-a07a-a48fb63a330f --- .../optimization/linesearch/WolfeConditions.java | 45 ++++++++++++++++++++++ 1 file changed, 45 insertions(+) create mode 100644 gi/posterior-regularisation/prjava/src/optimization/linesearch/WolfeConditions.java (limited to 'gi/posterior-regularisation/prjava/src/optimization/linesearch/WolfeConditions.java') 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(); + } + +} -- cgit v1.2.3