Re: Sparse rank revealing QR

LAPACK is excellent (if you are looking for DENSE linear algebra),
however, I am looking for SPARSE implementation (there are
additonal issues, such as preserving the sparsity of the factors, reducing
computation time, etc.). Thanks for the advice, anyway.

On Thu, 22 Mar 2007 12:24:42 -0700, user923005 wrote:

On Mar 22, 9:36 am, dirkdiggler <dirk_f_digg...@xxxxxxxxx> wrote:
Hello everybody! Is there a good (preferably open-source) C of FORTRAN
implementation of sparse rank revealing QR?

If Fortran 77 is OK, there's LAPACK:
http://www.netlib.org/lapack/

See the LAPACK working note 114 found here:
http://www.netlib.org/lapack/lawns/downloads/

.