Sync public subset from Flux

include/numerics/vecmean.h

@@ -0,0 +1,28 @@
+#ifndef _mean_n_
+#define _mean_n_
+
+#include "./utils/vector.h"
+#include "./utils/matrix.h"
+#include "./core/omp_config.h"
+
+namespace numerics{
+	
+	template <typename T>
+	T vecmean(utils::Vector<T>& a) {
+
+		T mean(T{0});
+
+		const uint64_t N = a.size();
+
+
+	    for (uint64_t i = 0; i < N; ++i) {
+            mean += a[i];
+	    }
+	    mean /= (static_cast<T>(N));
+	    return mean;
+	}
+
+
+} // namespace numerics
+
+#endif // _mean_n_