Re: matrix library ?

From: boost_at_[hidden]
Date: 2001-03-26 10:55:56

--- In boost_at_y..., Gabriel Dos Reis <Gabriel.Dos-Reis_at_c...> wrote:
> "David Abrahams" <abrahams_at_m...> writes:
> 
> [...]
> 
> | > Yet, even if the index convention problem is fixed, we still 
need
> | > to solve the row-major/column-major problem ...
> | 
> | What problem is that? I thought row-major/column-major was just a
> | distinction describing underlying storage format, and thus an 
implementation
> | detail.
> 
> Yes and No.  It also affects how algorithms are written and at some
> extent, their efficiency.
> 
> -- Gaby

Salut,

actually one should provide both storage formats.
Art least I'm confronted with (dense, rather large) matrix 
multiplications of the form A_i * B_i, where A_i always appear on 
the left, and B_i appears on the right. 
So using different storage layouts, I can increase performance
since no strides appear.

Best wishes,
Peter

I can improve