From 74f7e3e16a2794042f1f2a42b79571baef7eafad Mon Sep 17 00:00:00 2001
From: Natesh Srinivasan <natesh.rvce@gmail.com>
Date: Fri, 2 Aug 2013 16:59:46 +0000
Subject: [PATCH] added a funtion for computing log-Determinant

---
 gtsam/linear/GaussianBayesTree.cpp | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/gtsam/linear/GaussianBayesTree.cpp b/gtsam/linear/GaussianBayesTree.cpp
index 7011524e4..17d54635c 100644
--- a/gtsam/linear/GaussianBayesTree.cpp
+++ b/gtsam/linear/GaussianBayesTree.cpp
@@ -82,10 +82,15 @@ void gradientAtZero(const GaussianBayesTree& bayesTree, VectorValues& g) {
 
 /* ************************************************************************* */
 double determinant(const GaussianBayesTree& bayesTree) {
+  return exp(logDeterminant(bayesTree));
+}
+
+/* ************************************************************************* */
+double logDeterminant(const GaussianBayesTree& bayesTree) {
   if (!bayesTree.root())
     return 0.0;
 
-  return exp(internal::logDeterminant<GaussianBayesTree>(bayesTree.root()));
+  return internal::logDeterminant<GaussianBayesTree>(bayesTree.root());
 }
 /* ************************************************************************* */