只需將數字存入 List 帶入 Function 即可計算出結果。

        /// <summary>
        /// 平均值
        /// </summary>
        /// <param name="val"></param>
        /// <returns></returns>
        static double AVG(List<double> val)
        {
            try
            {
                double _sum = SUM(val);
                if (_sum > 0 && val.Count > 0)
                {
                    double _avg = _sum / (double)val.Count;
                    return _avg;
                }
                else
                    return 0;
            }
            catch
            {
                return 0;
            }
        }
        /// <summary>
        /// 加總
        /// </summary>
        /// <param name="val"></param>
        /// <returns></returns>
        static double SUM(List<double> val)
        {
            try
            {
                if (val.Count > 0)
                    return (from g in val select g).Sum();
                else
                    return 0;
            }
            catch
            {
                return 0;
            }
        }
        /// <summary>
        /// 眾數
        /// </summary>
        /// <param name="val"></param>
        /// <returns></returns>
        static double Mode(List<double> val)
        {
            try
            {
                val.Sort();
                double num = val.First();
                int count = 0;
                double max_num = num;
                int max_count = 0;
                foreach (double v in val)
                {
                    if (v == num)
                        count++;
                    else
                    {
                        if (max_count < count)
                        {
                            max_num = num;
                            max_count = count;
                        }
                        num = v;
                        count = 1;
                    }
                }
                return max_num;
            }
            catch
            {
                return 0;
            }
        }
        /// <summary>
        /// 調和平均數
        /// </summary>
        /// <param name="val"></param>
        /// <returns></returns>
        static double HarmonicAverage(List<double> val)
        {
            try
            {
                int i = 0;
                double num = 0;
                foreach (double v in val)
                {
                    if (v > 0)
                    {
                        i++;
                        num += 1 / v;
                    }
                }
                if (i > 0 && num > 0)
                    return i / num;
                else
                    return 0;
            }
            catch
            {
                return 0;
            }
        }
        /// <summary>
        /// 幾何平均數
        /// </summary>
        /// <param name="val"></param>
        /// <returns></returns>
        static double GeometricMean(List<double> val)
        {
            try
            {
                int r = 0;
                double prod = 1;
                foreach (double v in val)
                {
                    if (prod * v > double.MaxValue)
                    {
                        prod = Math.Pow(prod, 1.0 / r);
                        r = 0;
                    }
                    r++;
                    prod *= v;
                }
                return Math.Pow(prod, 1.0 / r);
            }
            catch
            {
                return 0;
            }
        }