- Noise_Init() depoends only on seed

- more detrmistic calls of shuffle()
- Shuffle() init weights with uniform noise

git-svn-id: http://moon:8086/svn/software/trunk/projects/RBM@599 b431acfa-c32f-4a4a-93f1-934dc6c82436

Source/Weights.hpp

@@ -82,23 +82,27 @@ public:
 		m_w.resize(m_numVisible, m_numHidden);
 		m_bv.resize(m_numVisible);
 		m_bh.resize(m_numHidden);
-		shuffle(0.01);
 	}
 
 	void shuffle(double stdDev)
 	{
 		uint32_t i, j;
 
-		m_bv.array().fill(stdDev*Noise_Gaussian(&m_noise));
-		m_bh.array().fill(stdDev*Noise_Gaussian(&m_noise));
-
 		for (i=0; i < m_numVisible; i++)
 		{
 			for (j=0; j < m_numHidden; j++)
 			{
-				m_w(i,j) = stdDev*Noise_Gaussian(&m_noise);
+				m_w(i,j) = stdDev*(Noise_Uniform(&m_noise) - 0.5);
 			}
 		}
+		for (i=0; i < m_numVisible; i++)
+		{
+			m_bv(i) = stdDev*(Noise_Uniform(&m_noise) - 0.5);
+		}
+		for (i=0; i < m_numHidden; i++)
+		{
+			m_bh(i) = stdDev*(Noise_Uniform(&m_noise) - 0.5);
+		}
 	}
 
 	Weights& operator= (const Weights &rhs)

Source/noise.c

@@ -46,7 +46,7 @@ double ran0(long *idum)
 void Noise_Init(noise_gen_t *pObj, long seed)
 {
 
-	pObj->state = seed ^ clock();
+	pObj->state = seed;
 }
 
 void Noise_Free(noise_gen_t *pObj)