分段线性插值 C#代码

/// <summary>        /// 分段线性插值，将一组数插值为所需点数        /// </summary>        /// <param name="dataIn">待插值的数据数组</param>        /// <param name="n">插值点数</param>        /// <returns>插值后的数据数组</returns>        public static double[] Interpolation(double[] dataIn, int n)        {            double[] dataOut = new double[n];            int lenIn = dataIn.Length;            double[] a = new double[lenIn];            double[] divIn = new double[lenIn];            double[] divOut = new double[n];            divIn[0] = 0;            for (int i = 1; i < lenIn; i++)            {                divIn[i] = divIn[i - 1] + 1;            }            divOut[0] = 0;            for (int i = 1; i < n; i++)            {                divOut[i] = divOut[i - 1] + lenIn / Convert.ToDouble(n);            }            int k = 0;            for (int i = k; i < n; i++)            {                for (int j = 0; j < lenIn - 1; j++)                {                    if (divOut[i] >= divIn[j] && divOut[i] < divIn[j + 1])                    {                        dataOut[i] = (dataIn[j + 1] - dataIn[j]) * (divOut[i] - divIn[j]) / (divIn[j + 1] - divIn[j]) + dataIn[j];                        k = i;                    }                }            }            return dataOut;        }