• Frank Fischer <frank-fischer shadow-soft.de> Apr 30 2009
• JC <jcrapuchettes gmail.com> Apr 30 2009
• Frank Fischer <frank-fischer shadow-soft.de> May 01 2009
• Robert Fraser <fraserofthenight gmail.com> May 01 2009
• Frank Fischer <frank-fischer shadow-soft.de> May 01 2009
• Robert Fraser <fraserofthenight gmail.com> May 01 2009

Frank Fischer <frank-fischer shadow-soft.de> writes:

LYLA is a matrix and linear-algebra library for large scale matrices.

The library has been rewritten from scratch since version 0.1, so this
version is effectively the first release.  LYLA currently supports:

  * rectangular dense and sparse matrices
  * dense and sparse vectors
  * fundamental BLAS support

For more information please look at:

http://www.dsource.org/projects/lyla

Have fun,
Frank Fischer

JC <jcrapuchettes gmail.com> writes:

How large is "large scale matrices" and do you have any performance figures
that 
you can share?
Thanks,
JC

Frank Fischer wrote:
 LYLA is a matrix and linear-algebra library for large scale matrices.
 
 The library has been rewritten from scratch since version 0.1, so this
 version is effectively the first release.  LYLA currently supports:
 
   * rectangular dense and sparse matrices
   * dense and sparse vectors
   * fundamental BLAS support
 
 For more information please look at:
 
 http://www.dsource.org/projects/lyla
 
 Have fun,
 Frank Fischer

Frank Fischer <frank-fischer shadow-soft.de> writes:

JC wrote:

 How large is "large scale matrices" 


Depends on the size of your memory, but a vector with a dimension of several 
million and SPARSE matrices with millions of rows AND columns (but few non-
zero entries) should be possible.  Of course, dense matrices with one 
million rows and columns need too much memory.

 and do you have any performance
 figures that you can share?


Not yet, but if you use dense matrices and vectors only, many operations can 
be done by cblas routines and should be as fast.


Frank

Robert Fraser <fraserofthenight gmail.com> writes:

Frank Fischer wrote:
 LYLA is a matrix and linear-algebra library for large scale matrices.
 
 The library has been rewritten from scratch since version 0.1, so this
 version is effectively the first release.  LYLA currently supports:
 
   * rectangular dense and sparse matrices
   * dense and sparse vectors
   * fundamental BLAS support
 
 For more information please look at:
 
 http://www.dsource.org/projects/lyla
 
 Have fun,
 Frank Fischer


AWESOME.

Have sparse been implemented yet? I don't see them in the code tree?

Frank Fischer <frank-fischer shadow-soft.de> writes:

On 2009-05-01, Robert Fraser <fraserofthenight gmail.com> wrote:
 Frank Fischer wrote:
 LYLA is a matrix and linear-algebra library for large scale matrices.


 AWESOME.

 Have sparse been implemented yet? I don't see them in the code tree?


Yes, currently one sparse-format is implemented.  The default type
aliases for double values are called DRowSparse and DColSparse defined
in module lyla.Matrix.

But be warned, most operations (like adding two sparse matrices) are 
currently *not* optimised for sparse matrices and not as fast as they
could be.  


Frank

Robert Fraser <fraserofthenight gmail.com> writes:

Frank Fischer wrote:
 On 2009-05-01, Robert Fraser <fraserofthenight gmail.com> wrote:
 Frank Fischer wrote:
 LYLA is a matrix and linear-algebra library for large scale matrices.



 Have sparse been implemented yet? I don't see them in the code tree?


 Yes, currently one sparse-format is implemented.  The default type
 aliases for double values are called DRowSparse and DColSparse defined
 in module lyla.Matrix.
 
 But be warned, most operations (like adding two sparse matrices) are 
 currently *not* optimised for sparse matrices and not as fast as they
 could be.  
 
 
 Frank
 


http://www-user.tu-chemnitz.de/~fifr/repos/lyla-d/src/lyla/Matrix.d 
doesn't mention it. I haven't done a checkout; so I'm guessing there's 
just something wrong with the HTML view or something. OK, thanks!