QLNet.GeneralStatistics.skewness C# (CSharp) Метод

        public double skewness()
        {
            if (skewness_ == null) {
                int N = samples();
                if (!(N > 2)) throw new ApplicationException("sample number <=2, unsufficient");

                double x = expectationValue(y => Math.Pow(y.Key * y.Value - mean(), 3), y => true).Key;
                double sigma = standardDeviation();

                skewness_ = (x / Math.Pow(sigma, 3)) * (N / (N - 1.0)) * (N / (N - 2.0));
            }
            return skewness_.GetValueOrDefault();
        }