Oct. 27, 2014
11:55 a.m.
On 27 October 2014 09:37, Sunghwan Choi <sunghwanchoi91@gmail.com> wrote:
One of them is inaccurate or both two of them are inaccurate within that range. Which one is more accurate?
You can check it yourself using the eigenvectors. The cosine distance between v and M.dot(v) will give you the error in the eigenvectors, and the difference between ||lambda*v|| and ||M.dot(v)|| the error in the eigenvalue. I would also check the condition numbers, maybe your matrix is just not well conditioned. You would have to look at preconditioners. /David.