Encog.MathUtil.LIBSVM.Kernel.dot C# (CSharp) Method

        internal static double dot(svm_node[] x, svm_node[] y)
        {
            double sum = 0;
            int xlen = x.Length;
            int ylen = y.Length;
            int i = 0;
            int j = 0;
            while (i < xlen && j < ylen)
            {
                if (x[i].index == y[j].index)
                    sum += x[i++].value_Renamed*y[j++].value_Renamed;
                else
                {
                    if (x[i].index > y[j].index)
                        ++j;
                    else
                        ++i;
                }
            }
            return sum;
        }