function f = loglikelihood_snn(a, t)%LOGLIKELIHOOD_SNN Log likelihood error.%%  Syntax%%   f = loglikelihood_snn(y, t)%%     y - output%     t - target%     f - log likelihood error%if isstr(a)   switch lower(a)     case 'deriv',	  f = 'dloglikelihood_snn';     case '2deriv',          f = 'd2loglikelihood_snn';     case 'inv',          f = 'invloglikelihood_snn';     otherwise,	  error('Unrecognized code.')   end   returnendf = log(a./t) + t./a - 1.0;