From 8706ce7e94cd4df4199f8e489c4729e94bf853cf Mon Sep 17 00:00:00 2001
From: graehl <graehl@ec762483-ff6d-05da-a07a-a48fb63a330f>
Date: Tue, 13 Jul 2010 02:29:49 +0000
Subject: Tanimoto coeff fix

git-svn-id: https://ws10smt.googlecode.com/svn/trunk@228 ec762483-ff6d-05da-a07a-a48fb63a330f
---
 decoder/sparse_vector.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/decoder/sparse_vector.h b/decoder/sparse_vector.h
index bfdeebcc..6b256a8e 100644
--- a/decoder/sparse_vector.h
+++ b/decoder/sparse_vector.h
@@ -83,7 +83,7 @@ public:
     template<typename S>
     S tanimoto_coef(const SparseVector<S> &vec) const {
       S dp=dot(vec);
-      return dp/(l2norm_sq()*vec.l2norm_sq()-dp);
+      return dp/(l2norm_sq()+vec.l2norm_sq()-dp);
     }
 
     template<typename S>
-- 
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