[Master Index] [Index for export/lyngby]

lyngby_nn_qddevs

(export/lyngby/lyngby_nn_qddevs.m)


Function Synopsis

ddEV = lyngby_nn_qddevs(X, V, W, H12)

Help text

 lyngby_nn_qddevs     - 2nd der., quadratic, input, gauss approx.

       function ddEV = lyngby_nn_qddevs(X, V, W, H12)

	Input:  X     Neural network input
               V     Input weights
               W     Output weights
               H12   (1-tanh(XV).^2) 

       Output: ddEV  Derivative as a Hessian matrix

       Gauss-Newton (symmetric) approximation to the second order
       derivative of the qaudratic error function with respect to the
       input weights in the neural network.

Cross-Reference Information

This function is called by

Produced by mat2html on Wed Jul 29 15:43:40 2009
Cross-Directory links are: OFF