- improved RnnStack

- AStack: context doesn't belong o training data

git-svn-id: http://moon:8086/svn/software/trunk/projects/Rbm@827 b431acfa-c32f-4a4a-93f1-934dc6c82436

source/RnnStack.hpp

@@ -18,6 +18,8 @@
 
 class RnnStack : public AStack
 {
+	const size_t NUM_CODES = 37;
+	
 public:
 	RnnStack(const std::string &name, size_t numContext);
 	RnnStack(const RnnStack& orig) = delete;
@@ -34,9 +36,20 @@ public:
     arma::mat vc_to_v(const arma::mat &vc) const;
     arma::mat vc_to_c(const arma::mat &vc) const;
 	
+	arma::mat step_forward(arma::mat &state, const arma::mat &v);
+
+	arma::mat to_next(const arma::mat &v)
+	{
+		return v.cols(0, NUM_CODES-1);
+	}
+
+	arma::mat to_curr(const arma::mat &v)
+	{
+		return v.cols(NUM_CODES, 2*NUM_CODES-1);
+	}
+	
 private:
 	size_t m_numContext;
-	
 };
 
 #endif /* RNNSTACK_HPP */