Open discussion regarding features, bugs, issues, vendors, etc.
Can I use LAPACK to find only the largest absolute eigenvalue of a matrix? If there is no single largest value, then the equal largest will do. I only require that largest absolute eigenvalue and was hoping to save time by not calculating the others.
- Posts: 2
- Joined: Mon Nov 07, 2011 12:39 am
The LAPACK expert-routines (s/d)syevx, (c/z)heevx allow to
calculate a selected range of Eigenvalues and optional Eigenvectors.
You can also look for code of the Lanczos-method, but these
LAPACK-routines are very very good.
- Posts: 19
- Joined: Thu Sep 01, 2011 5:02 am
Return to User Discussion
Who is online
Users browsing this forum: Bing [Bot] and 3 guests