这是一个很基础的用MATLAB解决函数逼近问题一个程序，可以在次基础上进行扩展，对于了解MATLAB的神经网络工具箱也是一个很好的了解。-This is a very basic function approximation using MATLAB to solve the problem a program that can be extended on the basis of the times, for the understanding of the neural network t