matlab的程序，请问一下里面有什么错呢？找不出来啊clc,clear load 1.txt y

matlab的程序，请问一下里面有什么错呢？找不出来啊clc,clearload 1.txtyt=1;n=length(yt);alpha=0.8;st1_0=mean(yt(1:3));st2_0=st1_0;st3_0=st1_0;st1(1)=alpha*yt(1)+(1-alpha)*st1_0;st2(1)=alpha*st1(1)+(1-alpha)*st2_0;st3(1)=alpha*st2(1)+(1-alpha)*st3_0;for i=2:n st1(i)=alpha*yt(i)+(1-alpha)*st1(i-1); st2(i)=alpha*st1(i)+(1-alpha)*st2(i-1); st3(i)=alpha*st2(i)+(1-alpha)*st3(i-1);endxlswrite(✀1.xls✀,[st1✀,st2✀,st3✀])st1=[st1_0,st1];st2=[st2_0,st2];st3=[st3_0,st3];a=3*st1-3*st2+st3;b=0.5*alpha/(1-alpha)^2*((6-5*alpha)*st1-2*(5-4*alpha)*st2+(4-3*alpha)*st3);c=0.5*alpha^2/(1-alpha)*(st1-2*st2+st3);yhat=a+b+c;xlswrite(✀1.xls✀,yhat✀,✀Sheet1✀,✀D1✀)plot(1:n,yt,✀*✀,1:n,yhat(1:n),✀O✀)legend(✀实际值✀,✀预测值✀,2)xishu[c(n+1),b(n+1),a(n+1)];yhat2013=polyval(xishu,2);