function f = exptf_snn(x)%EXPTF_SNN Exponential transfer function.%% Syntax%%  f = exptf_snn(x)%%    x - input. %    f - output for transfer function.%% Description%%   EXPTF_SNN is a transfer function. Transfer functions%   calculate a layer's output from its net input.%%   EXPTF_SNN(x) takes one input,%     x - net input.%   and returns %     f - the exponential of x. %%   EXPTF_SNN(CODE) returns useful information for each CODE string:%     'deriv'  - Returns name of derivative function.%% See also%%   DEXPTF_SNN%if nargin < 1, error('Not enough arguments.'); endif isstr(x)  switch (x)    case 'version'	  f = 3.0;       % <-- Must be 3.0. (can be used in matlabs 	                 %     Neural network toolbox)    case 'deriv'	  f = 'dexptf_snn';     case 'output'	  f = [0 +inf];     case 'active'	  f = [-2 +inf];     otherwise, error('Unrecognized code.')  endelse  f = exp(x);  end