Re: [ublas] newcomer questions (not in FAQ)

From: Dominik Szczerba (dominik_at_[hidden])
Date: 2008-08-30 02:17:33

On Saturday 30 August 2008 02:38:40 am Gunter Winkler wrote:
> Dominik Szczerba wrote:
> > Hi,
> > Can ublas do the following things for me:
> >
> > - define base for indexing. fortran storage seems to be available as a
> > template parameter if I am not mistaken, but I need in addition counting
> > indexes from 1, not 0.
>
> some sparse matrix types support this. (See the 'index base', IB
> template parameter)

is it also available for small dense matrices?

>
> > - use slicing and subindexing, e.g.
> > double_matrix2(int_matrix1(:,3)) or int_matrix3(int_vector1)
>
> there are a matrix_slice and an indirect_matrix proxy available.

that is great.

>
> > - unfold a matrix into vector, like in matlab v=m(:)
>
> It's possible, though not 'officially' supported.

any hint how? just referencing the first element of the matrix?

thanks a lot,
Dominik
>
> mfg
> Gunter
>
>
>
> _______________________________________________
> ublas mailing list
> ublas_at_[hidden]
> http://lists.boost.org/mailman/listinfo.cgi/ublas

-- 
Dominik Szczerba, Ph.D.
Computational Physics Group
Foundation for Research on Information Technologies in Society
http://www.itis.ethz.ch