added support for XML reading/writing

new serialization interfaces
new helper methods
new wifi models

math/MovingStdDevTS.h

@@ -0,0 +1,49 @@
+#ifndef MOVINGSTDDEVTS_H
+#define MOVINGSTDDEVTS_H
+
+#include "MovingAverageTS.h"
+
+/**
+ * moving stadnard-deviation using a given time-region
+ */
+template <typename T> class MovingStdDevTS {
+
+private:
+
+	MovingAverageTS<T> avg;
+	MovingAverageTS<T> avg2;
+
+
+public:
+
+
+	/** ctor with the window-size to use */
+	MovingStdDevTS(const Timestamp window, const T zeroElement) : avg(window, zeroElement), avg2(window, zeroElement) {
+		;
+	}
+
+	/** add a new entry */
+	void add(const Timestamp ts, const T& data) {
+
+		// E(x)
+		avg.add(ts, data);
+
+		// E(x^2)
+		avg2.add(ts, data*data);
+
+	}
+
+	/** get the current std-dev */
+	T get() const {
+
+		const T e = avg.get();
+		const T e2 = avg2.get();
+		const T var = e2 - e*e;
+		return std::sqrt(var);
+
+	}
+
+
+};
+
+#endif // MOVINGSTDDEVTS_H

math/distribution/Rectangular.h

@@ -0,0 +1,46 @@
+#ifndef RECTANGULAR_H
+#define RECTANGULAR_H
+
+
+#include <cmath>
+#include <random>
+#include "../Random.h"
+#include "../../Assertions.h"
+#include "Normal.h"
+
+namespace Distribution {
+
+	/** normal distribution */
+	template <typename T> class Rectangular {
+
+	private:
+
+		const T mu;
+		const T h;
+		const T width;
+
+	public:
+
+		/** ctor */
+		Rectangular(const T mu, const T width) : mu(mu), h(1.0/width), width(width) {
+
+		}
+
+		/** get probability for the given value */
+		T getProbability(const T val) const {
+			const T diff = std::abs(val - mu);
+			return (diff < width/2)	? (h) : (0.0);
+		}
+
+		/** get the probability for the given value */
+		static T getProbability(const T mu, const T width, const T val) {
+			Rectangular<T> dist(mu, width);
+			return dist.getProbability(val);
+		}
+
+	};
+
+}
+
+
+#endif // RECTANGULAR_H