g = glmderiv(net, x)
g = glmderiv(net, x) takes a network data structure net and a matrix
of input vectors x and returns a three-index matrix mat{g} whose
i, j, k
element contains the derivative of network output k with respect to
weight or bias parameter j for input pattern i. The ordering of the
weight and bias parameters is defined by glmunpak.
glm, glmunpak, glmgrad
Copyright (c) Ian T Nabney (1996-9)