new walker (control+path)

added new sanity checks
fixed minor errors
added corresponding test-cases
added moving-median

math/MovingMedian.h

@@ -0,0 +1,65 @@
+#ifndef MOVINGMEDIAN_H
+#define MOVINGMEDIAN_H
+
+#include <vector>
+#include <algorithm>
+
+template <typename T> class MovingMedian {
+
+private:
+
+	/** up to "size" elements */
+	std::vector<T> values;
+
+	/** the number of elements to find the median within */
+	int size;
+
+public:
+
+	/** ctor */
+	MovingMedian(const int size) : size(size) {;}
+
+	/** add a new value */
+	void add(const T val) {
+
+		// add new value
+		values.push_back(val);
+
+		// too many values?
+		if ((int) values.size() > size) {
+			values.erase(values.begin());
+		}
+
+	}
+
+	/** get the current median */
+	T get() const {
+
+		// create a sorted copy (slow, but works)
+		std::vector<T> copy = values;
+		std::sort(copy.begin(), copy.end());
+
+		// get the median
+		if (values.size() % 2 != 0) {
+			return values[(values.size() + 0) / 2];
+		} else {
+			return (values[values.size() / 2 - 1] + values[values.size() / 2 + 0]) / 2;
+		}
+
+	}
+
+
+	/** get the number of used entries */
+	int getNumUsed() const {
+		return (int) values.size();
+	}
+
+	/** get number of entries to get the median for */
+	int getSize() const {
+		return size;
+	}
+
+
+};
+
+#endif // MOVINGMEDIAN_H

math/TestMovingMedian.h

@@ -0,0 +1,6 @@
+#ifndef TESTMOVINGMEDIAN_H
+#define TESTMOVINGMEDIAN_H
+
+
+
+#endif // TESTMOVINGMEDIAN_H