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Ublas : |
From: Peter Melchior (pmelchior_at_[hidden])
Date: 2005-09-22 05:39:33
Thanks a lot, that solved the problem.
Best regards,
Peter
On Tue, 2005-09-20 at 17:01 +0200, Rutger ter Borg wrote:
> It could be that the matrices are in row_major format (uBLAS default). The
> lapack bindings only work correctly with matrices using column_major
> orientation.
>
> Best regards,
>
> Rutger
>
>
>
> Peter Melchior wrote:
>
> > Hello,
> >
> > I'm using LAPACK + bindings to do a Singular Value Decomposition of
> > uBLAS matrices. For inverting a matrix, I need the U and the Vt matrix
> > calculated explicitly.
> >
> > But whatever I give as Jobu and Jobvt, only the Vt matrix will be
> > calculated correctly; the U matrix has only correct diagonal elements.
> >
> > I've tried the Jobu = 'A' setting for gesvd and the Jobz = 'A' setting
> > for gesdd with exactly the same results as JobX = 'O'.
> >
> > I'm using the ublas bindings from CVS (checkout: 09.09.2005).
> >
> >
> > Can anybody give me a hint, what might go wrong here.
> >
> >
> > Best regards,
> >
> > Peter
> >
> > _______________________________________________
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> > ublas_at_[hidden]
> > http://lists.boost.org/mailman/listinfo.cgi/ublas
>
>
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