clc;
sqrs=[20.55 22.44 25.37 27.13 29.45 30.10 30.96 34.06 36.42 38.09 39.13 39.99 41.93 44.59 47.30 52.89 55.73 56.76 59.17 60.63];
sqjdcs=[0.6 0.75 0.85 0.9 1.05 1.35 1.45 1.6 1.71 1.85 2.15 2.2 2.25 2.35 2.5 2.6 2.7 2.85 2.95 3.1];
sqglmj=[0.09 0.11 0.11 0.14 0.2 0.23 0.23 0.32 0.32 0.34 0.36 0.36 0.38 0.49 0.56 0.59 0.59 0.67 0.69 0.79];
glkyl=[5126 6217 7730 9145 10460 11387 12353 15750 18304 19836 21024 19490 20433 22598 25107 33442 36836 40548 42927 43462];
glhyl=[1237 1379 1385 1399 1663 1714 1834 4233 8132 8936 11099 11203 10524 11115 13320 16762 18673 20724 20803 21804];
p=[sqrs;sqjdcs;sqglmj];
t=[glkyl;glhyl];
[pn,minp,maxp,tn,mint,maxt]=premnmx(p,t);
dx=[-1,1;-1,1;-1,1];
net=newff(dx,[3,7,2],{‘tansig‘,‘tansig‘,‘purelin‘},‘traingdx‘);
net.trainParam.show=1000;
net.trainParam.Lr=0.05;
net.trainParam.epochs=50000;
net.trainParam.goal=0.65*10^(-3);
net=train(net,pn,tn);
an=sim(net,pn);
a=postmnmx(an,mint,maxt);
x=1990:2009;
newk=a(1,:);
newh=a(2,:);
figure(2);
subplot(2,1,1);
plot(x,newk,‘r-o‘,x,glkyl,‘b--+‘);
legend(‘网络输出客流量‘,‘实际客流量‘);
xlabel(‘年份‘);ylabel(‘客运量‘);
title(‘客运量‘);
subplot(x,newk,‘r-o‘,x,glkyl,‘b--+‘);
legend(‘网络输出客流量‘,‘实际客流量‘);
xlabel(‘年份‘);ylabel(‘客运量‘);
title(‘客运量‘);
pnew=[73.39 75.55
3.9635 4.0975
0.988 1.0268];
pnewn=tramnmx(pnew,minp,maxp);
anewn=sim(net,pnewn);
anew=postmnmx(anewn,mint,maxt)
原文：http://www.cnblogs.com/jalon123/p/5389267.html