d2crosslogistic_snn.m

神经网络的工具箱, 神经网络的工具箱,

function d2f_da2 = d2crosslogistic_snn(a, t)
%D2CROSSLOGISTIC_SNN 2nd derivative of crosslogistic error.
%

d2f_da2 = t./(a.^2) + (1-t)./((1-a).^2);