how can i change Matrix last row with loop?

Hi there, i am a begginer in Matlab and i have problem with solving the matrix.. The problem is that i dont know how to change last row in matrix with numbers

[0 0 0 -1] - matrix one

[0 0 -2 -1] - matrix two

[0 -3 -2 -1] - matrix three

[-4 - 3 -2 -1] - matrix four

And here is my code:

for n = 2:5

A22 = eye(n, n-1);

A21 = zeros(n, 1);

A = [A21, A22];

end

(this code is working, i only need to change last row)

Answer 1

[Setsuna Yuuki.]

this can work

for n = 2:6   
A22 = eye(n, n-1);
A21 = zeros(n, 1);
A = [A21, A22];
end
A = A(1:5,:)

[Setsuna Yuuki.]

I now understand jaja

maybe this will work

for n = 2:5
A22 = eye(n,n-1);
A21 = zeros(n,1);
A = [A21, A22];
A(n,:)= -n:-1
matrix{n-1} = A;
end

[Setsuna Yuuki.]

i don't know if the result is correct, but the eigenvalues can be complex.