demo2.m

用matlab编程,采用神经网络是别的方法,

P = [1 2; 2 2; 1 1]';
Tc = [1 2 3];
T = ind2vec(Tc);
spread = 1;
net = newpnn(P,T,spread);
A = sim(net,P);
Ac = vec2ind(A);
plot(P(1,:),P(2,:),'.','markersize',30)
axis([0 3 0 3])
for i=1:3,text(P(1,i)+0.1,P(2,i),sprintf('class %g',Ac(i))),end
title('Testing the network.')
xlabel('P(1,:)')
ylabel('P(2,:)')
pause