From e42e36e0049d0b5d2a14db9d03a989859f7902d3 Mon Sep 17 00:00:00 2001
From: Luca <luca.carlone@gatech.edu>
Date: Thu, 13 Mar 2014 22:44:21 -0400
Subject: [PATCH] hessianDiagonal is now virtual

---
 gtsam/linear/GaussianFactorGraph.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/gtsam/linear/GaussianFactorGraph.h b/gtsam/linear/GaussianFactorGraph.h
index 267792f33..aea90da1a 100644
--- a/gtsam/linear/GaussianFactorGraph.h
+++ b/gtsam/linear/GaussianFactorGraph.h
@@ -224,10 +224,10 @@ namespace gtsam {
     std::pair<Matrix,Vector> hessian(boost::optional<const Ordering&> optionalOrdering = boost::none) const;
 
     /** Return only the diagonal of the Hessian A'*A, as a VectorValues */
-    VectorValues hessianDiagonal() const;
+    virtual VectorValues hessianDiagonal() const;
 
     /** Return the block diagonal of the Hessian for this factor */
-    std::map<Key,Matrix> hessianBlockDiagonal() const;
+    virtual std::map<Key,Matrix> hessianBlockDiagonal() const;
 
     /** Solve the factor graph by performing multifrontal variable elimination in COLAMD order using
      *  the dense elimination function specified in \c function (default EliminatePreferCholesky),