?? exptf_snn.m
字號:
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
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