qe_snn.m

来自「神经网络的工具箱, 神经网络的工具箱,」· M 代码 · 共 30 行

function f = qe_snn(a, t)
%SE_SNN squared squared error.
%
%  Syntax
%
%   f = qe_snn(y, t)
%
%     y - output
%     t - target
%     f - squared error
%

if isstr(a)
   switch lower(a)
     case 'deriv',
	  f = 'dqe_snn';
     case '2deriv',
          f = 'd2qe_snn';
     case 'inv',
          f = 'invqe_snn';
     otherwise,
	  error('Unrecognized code.')
   end
   return
end

f = 0.25*((a - t).^4);