MATLAB无法执行赋值，因为左侧和右侧的元素数目不同

是基于峰值电流控制的BUCK转换器基础编程，还望大佬们帮新手看看吧！一下是源代码：

E=20
L=3.3e-3
C=1e-3
R=19
T=4e-4
A2 = [0,-1/L;1/C,-1/R*C]
A1 = A2
 A3=[0,0;0,-1/C*R]
 B1=[1/L;0]
B2=[0;0] 
B3=B2
O=A1^-1
O=A2^-1
 I=[1,0;0,1]

 for m=1:150
     Iref=0.1+0.01*(m-1)
     i(1)=0
     u(1)=0
     for n=1:1000
         Ib1=Iref-E*T/L
         if i(n)<=Ib1
            i(n+1)=exp(A1*T)*i(n)+(exp(A1*T)-I)*O*B1*E
            u(n+1)=exp(A1*T)*u(n)+(exp(A1*T)-I)*O*B1*E
         else
          t1 = (Iref-i(n))*L/E
         Ib2 = Iref-E*(T-t1)/L
          t2=T-t1
           if i(n) < Ib2
              i(n+1)=exp(A2*t2)*exp(A1*t1)*i(n)+exp(A2*t2)*(exp(A1*t1)-I)*O*B1*E
              u(n+1)=exp(A2*t2)*exp(A1*t1)*u(n)+exp(A2*t2)*(exp(A1*t1)-I)*O*B1*E
           else  
                         t1 = (Iref-i(n))*L/E
                t2=Iref*L/E
                t3=T-t1-t2
                i(n+1)=0
                u(n+1)=exp(A3*t3)*exp(A2*t2)*exp(A1*t1)*u(n)+exp(A3*t3)*exp(A2*t2)*(exp(A1*t1)-I)*O*B1*E
           end
         end
 end
 i1(m,:) = i(end-80:end) 
 uo(m,:) = u(end-80:end)
H= plot(Iref*ones(1,length(uo(m,:))),uo(m,:))
set(H,'linestyle','none','marker','.','markersize',3)
    hold on
    drawnow
end