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annotate toolboxes/FullBNT-1.0.7/netlab3.3/netderiv.m @ 0:e9a9cd732c1e tip

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first hg version after svn
author wolffd
date Tue, 10 Feb 2015 15:05:51 +0000
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wolffd@0 1 function g = netderiv(w, net, x)
wolffd@0 2 %NETDERIV Evaluate derivatives of network outputs by weights generically.
wolffd@0 3 %
wolffd@0 4 % Description
wolffd@0 5 %
wolffd@0 6 % G = NETDERIV(W, NET, X) takes a weight vector W and a network data
wolffd@0 7 % structure NET, together with the matrix X of input vectors, and
wolffd@0 8 % returns the gradient of the outputs with respect to the weights
wolffd@0 9 % evaluated at W.
wolffd@0 10 %
wolffd@0 11 % See also
wolffd@0 12 % NETEVFWD, NETOPT
wolffd@0 13 %
wolffd@0 14
wolffd@0 15 % Copyright (c) Ian T Nabney (1996-2001)
wolffd@0 16
wolffd@0 17 fstr = [net.type, 'deriv'];
wolffd@0 18 net = netunpak(net, w);
wolffd@0 19 g = feval(fstr, net, x);