dispatching for sparse

[David Bateman]

John W. Eaton wrote:
> [I'm moving this discussion to the maintainers list.  --jwe]
>
> On  4-Jan-2008, David Bateman wrote:
>
> | What we need to do to fix this is to use the newly introduced object
> | classes (ie the "@" directories in this case) and the superiorto
> | function to force mixed sparse/full function to be treated by the sparse
> | versions of the functions. As we are still missing the superiorto
> | function this isn't yet possible and so even converting to object
> | classes won't help here yet... I think this is one that will have to
> | wait at the moment.
>
> As it is currently implemented, the new class-based dispatching won't
> really help here since the class of a sparse object is always double.
>
> One possibility is to extend the class-based dispatch to be finer
> grained so that we can dispatch on "sparse", "sparse complex matrix",
> "sparse bool matrix", etc. (the string returned by typeinfo).  But
> this adds even more complexity to the type dispatch code, and I think
> I'd prefer to avoid it.
>
> Another possibility is to merge the sparse code with the existing
> functions and dispatch internally.  For example, we would eliminate
> spkron and just have kron, which then needs to do the dispatching
> itself for the various "internal" types.
>
>   
Well, I'd thought to move kron the the Array<T> and Sparse<T> classes
like I did with sort. However, I'm not sure that is the right thing to
do.. What about the attached instead.

D.




-- 
David Bateman                                David.Bateman at motorola.com
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