How do I make the loop run more than once?

The for loop only displays one iteration of B and I need many iterations so I can estimate the eigenvalues.

A=[8, -3, 0, 2; -9, 4, 5, -7; 6, -2, 2, 4; 5, -1, 7, 10];

for n = 1:5

[Q,R]=qr(A);

B=R*Q;

end

disp(B);

[KSSV]

Your A is fixed, how you expect B to change? You are running loop five times and every time you get the same Eigenvalues.

[Walter Roberson]

Duplicates https://www.mathworks.com/matlabcentral/answers/338269-i-m-trying-to-get-the-outputs-for-a-qr-factorization

Answer 1

[Jan]

A = [8, -3, 0, 2; -9, 4, 5, -7; 6, -2, 2, 4; 5, -1, 7, 10];
for n = 1:5
  [Q, R] = qr(A);
  A      = R * Q;  % not B = ...
end