From 7f69c868c41e4b36eecf9d3b1dc22f3f3aa1540c Mon Sep 17 00:00:00 2001
From: desaicwtf <desaicwtf@ec762483-ff6d-05da-a07a-a48fb63a330f>
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
---
 .../linesearch/InterpolationPickFirstStep.java     | 25 ++++++++++++++++++++++
 1 file changed, 25 insertions(+)
 create mode 100644 gi/posterior-regularisation/prjava/src/optimization/linesearch/InterpolationPickFirstStep.java

(limited to 'gi/posterior-regularisation/prjava/src/optimization/linesearch/InterpolationPickFirstStep.java')

diff --git a/gi/posterior-regularisation/prjava/src/optimization/linesearch/InterpolationPickFirstStep.java b/gi/posterior-regularisation/prjava/src/optimization/linesearch/InterpolationPickFirstStep.java
new file mode 100644
index 00000000..0deebcdb
--- /dev/null
+++ b/gi/posterior-regularisation/prjava/src/optimization/linesearch/InterpolationPickFirstStep.java
@@ -0,0 +1,25 @@
+package optimization.linesearch;
+
+
+public class InterpolationPickFirstStep extends GenericPickFirstStep{
+	public InterpolationPickFirstStep(double initValue) {
+		super(initValue);
+	}
+	
+	public double getFirstStep(LineSearchMethod ls){
+		if(ls.getPreviousStepUsed() != -1 && ls.getPreviousInitialGradient()!=0){
+			double newStep = Math.min(300, 1.02*ls.getPreviousInitialGradient()*ls.getPreviousStepUsed()/ls.getInitialGradient());
+		//	System.out.println("proposing " + newStep);
+			return newStep;
+			
+		}
+		return _initValue;
+	}
+	public void collectInitValues(WolfRuleLineSearch ls){
+		
+	}
+	
+	public void collectFinalValues(WolfRuleLineSearch ls){
+		
+	}
+}
-- 
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