#3281 Add weighted geometric mean calculator

ApplicationCode/Application/Tools/RiaWeightedGeometricMeanCalculator.h

@@ -0,0 +1,37 @@
+/////////////////////////////////////////////////////////////////////////////////
+//
+//  Copyright (C) 2018-     Statoil ASA
+//
+//  ResInsight is free software: you can redistribute it and/or modify
+//  it under the terms of the GNU General Public License as published by
+//  the Free Software Foundation, either version 3 of the License, or
+//  (at your option) any later version.
+//
+//  ResInsight is distributed in the hope that it will be useful, but WITHOUT ANY
+//  WARRANTY; without even the implied warranty of MERCHANTABILITY or
+//  FITNESS FOR A PARTICULAR PURPOSE.
+//
+//  See the GNU General Public License at <http://www.gnu.org/licenses/gpl.html>
+//  for more details.
+//
+/////////////////////////////////////////////////////////////////////////////////
+
+#pragma once
+
+//--------------------------------------------------------------------------------------------------
+///
+//--------------------------------------------------------------------------------------------------
+class RiaWeightedGeometricMeanCalculator
+{
+public:
+    RiaWeightedGeometricMeanCalculator();
+
+    void addValueAndWeight(double value, double weight);
+
+    double weightedMean() const;
+    double aggregatedWeight() const;
+
+private:
+    double m_aggregatedWeightedValue;
+    double m_aggregatedWeight;
+};