How can I fix the that error?

 t=[0:0.1:5];
f=1;
n=2;
w=2*pi*f;
x1=cos(w*t);
e=2*pi*x1;
syms x1
int(x1,0,5);
phi=(1/2);
Lam=n*phi;

Answer 1

[madhan ravi]

Size of th is 500by 4 and size of phi is 5 by 1 how can you add them??

[madhan ravi]

lot of bugs first you need to explain your desired result with short example

Answer 2

[KSSV]

Though the error is solved..you need to check your code...

close all;
th=[1 1 1 1]';
u(1)=1; y(1)=1;  y(2)=1;
mu=1;
r(1)=10;
N=500;
th=zeros(4,N);
for k=2:N
    r(k)=10;
    ym(k+1)=0.4*y(k)+0.6*r(k);
    u(k)=(1/th(1,k))*(-th(2,k)*u(k-1)-th(3,k)*y(k)-th(4,k)*y(k-1)+0.6*r(k));
    y(k+1)=1.7*y(k)-0.7*y(k-1)+2*u(k)+0.6*u(k-1);
    e(k+1)=y(k+1)-ym(k+1);
    phi=[u(k) u(k-1) y(k) y(k-1)]';
    th(:,k+1)=th(:,k)+mu*phi*e(k+1)./(1+phi'*phi);
end
plot(ym)
plot(r)
plot(u)
plot(y)
plot(th)