Matlab - bucle for con modelo armax

windspeed=xlsread('windspeeddata');

past_data=windspeed(:,3);

y1=past_data(1:50);

 for i=1:25

       b(:,i)=y1((i-1)+1:i*1+25);

 end

 for i=1:25;

     sys=armax(b(:,i),[1 2]);

 end

sys1=armax(b(:,1),[1 2]);

sys2=armax(b(:,2),[1 2]);

sys3=armax(b(:,3),[1 2]);

sys4=armax(b(:,4),[1 2]);

sys5=armax(b(:,5),[1 2]);

sys6=armax(b(:,6),[1 2]);

.....

for i=1:25;

eval(['sys' num2str(i) '=armax(b(:,i),[1 2]);'])

end