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Ublas : |
From: eeitan_at_[hidden]
Date: 2006-03-08 10:27:22
thanks for your answear. i am using ublas with ietl::lanczos to get lowest
eigen-pair and its takes much more time than using lapack to get all
eigen-pairs ( i am talking about sparse matrices 4000x4000 but my plan is to
work with much larger)
eitan
Quoting Matthias Troyer <troyer_at_[hidden]>:
> Hi Eeitan,
>
> The performance of IETL depends *only* on the performance of the
> underlying matrix/vector library. The time spent in the actual IETL
> functions is negligible. If you see any bad performance when using
> IETL with a specific linear algebra library, then it is because of
> that library.
>
> Matthias
>
> On Feb 20, 2006, at 3:45 AM, eeitan_at_[hidden] wrote:
>
> >
> > hello, is someone knows a good package that uses UBLAS ,for
> > calculating
> > eigenvalues & eigenvectors for sparse matrices?? ( i tried IETL but
> > their
> > performance is poor as far as i can see) .
> > thanks eitan.
> >
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