- refactored common functions into matutils

git-svn-id: http://moon:8086/svn/software/trunk/projects/Rbm@855 b431acfa-c32f-4a4a-93f1-934dc6c82436
2022-01-21 07:46:40 +00:00
parent c10d9c6e38
commit aef3049856
4 changed files with 80 additions and 57 deletions
@@ -0,0 +1,72 @@
+/*
+ * To change this license header, choose License Headers in Project Properties.
+ * To change this template file, choose Tools | Templates
+ * and open the template in the editor.
+ */
+
+/* 
+ * File:   matutils.hpp
+ * Author: jens
+ *
+ * Created on 21. Januar 2022, 08:28
+ */
+
+#ifndef MATUTILS_HPP
+#define MATUTILS_HPP
+
+#include <math.h>
+
+namespace Matutils
+{
+	inline void uniform(arma::mat& srcDst, double stdDev=1.0, double mu=0.5)
+	{
+	#if 0
+		for (size_t i=0; i < srcDst.n_rows; i++)
+		{
+			for (size_t j=0; j < srcDst.n_cols; j++)
+			{
+				srcDst(i, j) = stdDev*(Noise_Uniform(&m_noise) + mu - 0.5);
+			}
+		}
+	#else
+		srcDst = stdDev*(arma::randu(arma::size(srcDst)) + mu - 0.5);
+	#endif
+	}
+
+	inline arma::mat sample(const arma::mat &src)
+	{
+		arma::mat dst = src;
+		uniform(dst);
+
+	#if 0
+		for (size_t i=0; i < src.n_rows; i++)
+		{
+			for (size_t j=0; j < src.n_cols; j++)
+			{
+				dst(i, j) = src(i, j) >= dst(i, j);
+			}
+		}
+		return dst;
+	#else
+		arma::umat res = (dst < src);
+		return arma::conv_to<arma::mat>::from(res);
+
+	#endif	
+	}
+
+	inline arma::mat normalize(const arma::mat& src)
+	{
+		double mean = arma::accu(src)/src.n_elem;
+		arma::mat x = src - mean;
+		arma::mat x2 = x % x;
+		double stddev = sqrt(arma::accu(x2)/x2.n_elem);
+
+		std::cout << "mean" << "  : " << std::endl << mean << std::endl;
+		std::cout << "stddev" << ": " << std::endl << stddev << std::endl;
+		return x/stddev;
+	}
+
+}
+
+#endif /* MATUTILS_HPP */
+