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Sparse support [message #27453]

Tue, 23 October 2001 07:41

the_cacc
Messages: 104
Registered: October 2001

Senior Member

Hi,

The sparse matrix support in IDL is pretty lousy: real, square
matrices only. There are dozens of sparse routines on the web, why
doesn't IDL program some of them in...

Ciao.

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Re: Sparse support [message #27514 is a reply to message #27453]

Wed, 24 October 2001 08:20

mvukovic
Messages: 63
Registered: July 1998

Member

Ralf Flicker <rflicker@gemini.edu> wrote in message news:<3BD670D7.56B559A7@gemini.edu>...
> "Pavel A. Romashkin" wrote:
>>
>> trouble wrote:
>>>
>>> There are dozens of sparse routines on the web, why
>>> doesn't IDL program some of them in...
>>
>> Probably because those who want them are free to download them from the
>> web and use them?
>>
>> Ciao.
>
> Pardon my ignorance, but could you point me to some of those
> downloads? I'd be really interested. Thanks.
>
> ralf

http://www.netlib.org/

do a search for sparse matrix.

I recently implemented numerical recipes' fortran band diagonal
solver. Compiled it on my home pc with the gnu g77 compiler installed
with cygwin. I did not have the nerve to link it directly to IDL, so
the communication is clunky: via files. One can definitely do better.

Mirko

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