fun1.asv

XOR问题是神经网络里面一个经典的问题

function fun2 = fun1(lambda1)
x1(1,1)=-1;x1(1,2)=-1;
x1(2,1)=1;x1(2,2)=1;
x2(1,1)=1;x2(1,2)=-1;
N1=size(x1);
N2=size(x2);
X=[x1;x2];
Y1=ones(N1,1);
Y2=-ones(N2,1);
Y=[Y1;Y2];
fun2=(-Y)'*lambda+1/2*((lambda.*Y)'*X)*(X'*(lambda.*Y))