From 296c7cc2082557db4a82b4a1208986c6e93ad935 Mon Sep 17 00:00:00 2001
From: "trevor.cohn" <trevor.cohn@ec762483-ff6d-05da-a07a-a48fb63a330f>
Date: Fri, 9 Jul 2010 22:29:02 +0000
Subject: Added initial VB implementation for symetric Dirichlet prior.

git-svn-id: https://ws10smt.googlecode.com/svn/trunk@215 ec762483-ff6d-05da-a07a-a48fb63a330f
---
 gi/posterior-regularisation/prjava/src/arr/F.java | 15 +++++++++++----
 1 file changed, 11 insertions(+), 4 deletions(-)

(limited to 'gi/posterior-regularisation/prjava/src/arr/F.java')

diff --git a/gi/posterior-regularisation/prjava/src/arr/F.java b/gi/posterior-regularisation/prjava/src/arr/F.java
index 7f2b140a..54dadeac 100644
--- a/gi/posterior-regularisation/prjava/src/arr/F.java
+++ b/gi/posterior-regularisation/prjava/src/arr/F.java
@@ -4,18 +4,25 @@ import java.util.Random;
 
 public class F {
 	public static Random rng = new Random();
-	
+
 	public static void randomise(double probs[])
+	{
+		randomise(probs, true);
+	}
+
+	public static void randomise(double probs[], boolean normalise)
 	{
 		double z = 0;
 		for (int i = 0; i < probs.length; ++i)
 		{
 			probs[i] = 3 + rng.nextDouble();
-			z += probs[i];
+			if (normalise)
+				z += probs[i];
 		}
 
-		for (int i = 0; i < probs.length; ++i)
-			probs[i] /= z;
+		if (normalise)
+			for (int i = 0; i < probs.length; ++i)
+				probs[i] /= z;
 	}
 	
 	public static void l1normalize(double [] a){
-- 
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