Produces a matrix of derivatives of network output w.r.t. ％ each network weight for use in the functions NNPRUNE and NNFPE.-Produces a matrix of derivatives of network output wrt each network weight for use in the functions NNPRUNE and NNFPE.

This a demonstration of how to find a minimum of a non-smooth objective function using the Genetic Algorithm (GA) function in the Genetic Algorithm and Direct Search Toolbox. Traditional derivative-based optimization methods, like those foun

本例采用vc编程实现BP神经网络，程序将涉及到梯度下降法、函数求逆，以及偏导数的实现。-In this case using vc BP neural network programming, the program will involve the gradient descent method, the inverse function, as well as the realization of partial derivatives.