e = mlperr(net, x, t)
e = mlperr(net, x, t) takes a network data structure net together
with a matrix x of input vectors and a matrix t of target
vectors, and evaluates the error function e. The choice of error
funcion corresponds to the output unit activation function. Each row
of x corresponds to one input vector and each row of t
corresponds to one target vector.
[e, edata, eprior] = mlperr(net, x, t) also returns
the data and prior components of the total error.
mlp, mlppak, mlpunpak, mlpfwd, mlpbkp, mlpgradCopyright (c) Christopher M Bishop, Ian T Nabney (1996, 1997)