From 3a200cb46ef4ced975ed089ebc30bcff714f2417 Mon Sep 17 00:00:00 2001
From: Jens Ahrensfeld <jens@jayfield.org>
Date: Wed, 15 Jun 2016 20:53:54 +0000
Subject: [PATCH] [RBM] - fix: skip variable variance calculation if no
 training data is present

git-svn-id: http://moon:8086/svn/software/trunk/projects/RBM@291 b431acfa-c32f-4a4a-93f1-934dc6c82436
---
 Source/Rbm.hpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Source/Rbm.hpp b/Source/Rbm.hpp
index 82305b1..a0aa2a4 100644
--- a/Source/Rbm.hpp
+++ b/Source/Rbm.hpp
@@ -468,7 +468,7 @@ public:
 	void setDoLearnVariance(bool flag)
 	{
 		m_doLearnVariance = flag;
-		if (m_doLearnVariance)
+		if (m_doLearnVariance && m_batch.getSize())
 		{
 			m_variableSigma = calcSigma(m_batch.data());
 		}