- Layer: do gibbs sampling in calcContextBatch()

- RBM: added Gibbs sampler
- Stack adjust training column vector according to needs

git-svn-id: http://moon:8086/svn/software/trunk/projects/Rbm@797 b431acfa-c32f-4a4a-93f1-934dc6c82436

source/Layer.hpp

@@ -40,7 +40,9 @@ public:
 		{
 			for (int i=1; i < numTraining; i++)
 			{
-				arma::mat h = toHiddenProbs(batch.row(i-1));
+				arma::mat v = batch.row(i-1);
+				arma::mat h = arma::zeros(1, numHidden());
+				gibbs_vh(v, h);
 				arma::mat training_with_ctx = arma::join_rows(batch.row(i).cols(0, numVisible()-m_numContext-1), h);
 				batch.row(i) = training_with_ctx;
 			}