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function out = purelin(in1,in2,in3) % PURELIN线性传递函数。输出等于输入 % %语法 % % A= purelin(N) % dA_dN = purelin(N,“dn”) % %描述 % % PURELIN神经传递函数。转移函数 %计算净输入层的输出。 % % PURELIN(dn,N)返回衍生的w-respect N。 if strcmp(in1,'dn') out = derivative(in2,in3); else out = apply_transfer(in1); end %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%应用传递函数 function a = apply_transfer(n) a = n; %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% Y w /关于X的偏导数 function da_dn = derivative(n,a) da_dn = 1; %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%