Unable to perform assignment because the left and right sides have a different number of elements

So, i was testing some filters, when I recieved the error in the title. After some fiddling, I arrived to conclusion that i must be making a mistake by using r and dm variables as vectors. Or I am missing something?

% Constants
r = [0, 0, 0.078, 0.079, 0.079, 0.079]; 
s = 2;
dm = [0, 1, 1, 1, 3, 9]; 
% Initialize vectors
N = 300;
x1 = zeros(N, 1);
x2 = zeros(N, 1);
% Initial conditions
x1(1) = 1001;
x2(1) = 50;
 
% Simulate deterministic discrete-time dynamical system
for k = 1:N
    x1(k+1) = (1+r)*x1(k) - s*x2(k);
    if x1(k) > 1000
        x2(k+1) = x2(k) + dm;
    else
        x2(k+1) = x2(k) - dm;
    end
    % Restrict to [0, 100]
    x2(k+1) = max(0, min(x2(k+1), 100));
end
 
% Adding the stability testing
if x1(N) < 0 
disp ("bancrupt") 
elseif x1(N) > 2*x1(1)
disp ("rich")
else 
disp ("stable")
end 

[madhan ravi]

You're trying to store 6 values in place of 1 value.

[Mathieu NOE]

check dimensions

x1 and x2 are not same size as dm so error when you do x2(k+1) = x2(k) + dm; or x2(k+1) = x2(k) - dm;

[Artur Kastro]

I see. So, nested for loops?

[Mathieu NOE]

or it could work if you would make x1 and x2 as 2D matrixes...

[Artur Kastro]

Got it. Thanks