% Author: Housam Binous
% Eigenvalues obtained using QR-Method
% National Institute of Applied Sciences and Technology, Tunis, TUNISIA
% Email: binoushousam@yahoo.com
% Reference :
% A. Quarteroni, R. Sacco and F. Saleri, Mthodes numriques
% pour le calcul scientifique, Programmes en Matlab,
% Springer, Paris, 2000
A=[2., 3, 4, 5; 4, 2., 5, 6; 5, 7, 2., 7; 6, 8, 10, 2.];
M=A
for i=1:100;
[Q,R] = qr(M);
M=R*Q;
end
M
eig(A)
