Re: [ublas] pointer to matrix structure

Subject: Re: [ublas] pointer to matrix structure
From: Marcel Rehberg (Marcel.Rehberg_at_[hidden])
Date: 2011-08-08 04:37:10

Hi,

On Sun, 07 Aug 2011 22:38:26 +0200, Philipp Kraus  
<philipp.kraus_at_[hidden]> wrote:

> I have found a solution with this:
>
>         ublas::matrix<T> x = ublas::trans(p_dataset);
>         write( &(x.data()[0]), p_datatype, l_dataspace  );
>
> but can I change it without the transpose, because p_dataset is a very  
> large matrix? The write method is a library function that writes my  
> matrix data, but the write method need a "column oriantated array  
> structure", but my p_dataset input matrix is a row oriantated matrix.

You could use
        
ublas::matrix<T,ublas::column_major> X

as your main matrix type. I use it to interface lapack which also expects  
column orientation.

Greetings

Marcel