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lauchli


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 -- Function File: A = lauchli (N)
 -- Function File: A = lauchli (N,MU)
     Creates the matrix [ ones(1,N); MU*eye(N) ] The value MU defaults
     to sqrt(eps).  This is an ill-conditioned system for testing the
     accuracy of the QR routine.

                A = lauchli(15);
                [Q, R] = qr(A);
                norm(Q*R - A)
                norm(Q'*Q - eye(rows(Q)))

See also: ones,zeros,eye.


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Creates the matrix [ ones(1,N); MU*eye(N) ] The value MU defaults to
sqrt(eps).





