x1t=da[,31]
x2t=da[,32]
yt=da[,29]
for (t in 742:858)
{x11t=x1t[2:t];
x22t=x2t[2:t];
y1t=yt[2:t];
m1=lm(y1t~x11t+x22t);
coef1=m1$coef;
predict[t]=coef1[1]+coef1[2]*x1t[t+1]+coef1[3]*x2t[t+1];
}
我想问下,我想做回归,然后预测,这样程序哪里错了啊?谢谢~