invert nearly singular matrix
5 visualizzazioni (ultimi 30 giorni)
Mostra commenti meno recenti
I am trying to solve the poisson equation in cylindrical coordinates using a finite difference which essentially narrows down to Ax = B where A is a finite difference matrix, x and B are column vectors. I am solving for x and unfortunately A is nearly singular. So when I do x = A\B i get inaccurate answers. Is there a way to accurately solve this issue?
0 Commenti
Risposte (1)
Jan
il 22 Mag 2012
Some instable systems caused by nearly singular matrices can be solved sufficiently using quadrupel precision. See INTLAB of Rump, http://www.ti3.tu-harburg.de/rump/Research/topics.php.
0 Commenti
Vedere anche
Categorie
Scopri di più su Linear Algebra in Help Center e File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!