Convenience function to output the sum of orthonormal Hermite functions
The method calculates the sum of orthonormal Hermite functions, \(\sum_{i} h_k(x_{i})\) from \(k=0,\dots,N\) for the vector of values, x.
hermite_function_sum_N(N, x)
A numeric vector of length N+1.
An integer number.
A numeric vector.