Re: Help with [] for defined types

[Andy Adler]

OK, I understand why it is so hard now.

For stuff like your galois field types, which inherit from NDMatrix,
they don't need to add to the conversion table in data.cc. However,
doing this with sparse would need to add a new row and column.
I suppose it would be (after testing with Matlab)

          //       re   cx   ch c  spre spcx
          // --------------------
          // re   |re   cx   ch X  spre spcx
          // cx   |cx   cx   X  X  spcx spcx
          // ch   |ch   X    ch X   X    X
          // cell |X    X    X  c   X    X
             spre  spre spcx X  X   spre spcx
             spcx  spcx spcx X  X   spcx spcx
          // (X means incompatible).

This appears to be a significant pain right now. I think I've
decided to leave it for the moment (after all, the functions
sphcat and spvcat exist)

Thanks

Andy


On Mon, 5 Jul 2004, David Bateman wrote:

>
> Unfortunately you need more than that.... At the moment "[]" is
> hard-coded in pt-mat.cc in tree_matrix::rvalue. John talked about
> doing something about this. See the threads.
>
> http://www.octave.org/octave-lists/archive/help-octave.2003/msg02027.html
> http://www.octave.org/mailing-lists/octave-maintainers/2004/243
>
> Cheers
> David
>
> According to Andy Adler <address@hidden> (on 07/05/04):
> > I'm trying to get s1=[s2,s3] to work for the sparse type.
> >
> > Looking at the code in liboctave, it seems that you need
> > to define a method:
> >
> >    int octave_sparse::cat (const octave_sparse& ra_arg, int dim, int iidx,
> >        int move);
> >
> > I've tried defining this, but to no avail. Also, its not clear to me what
> > the various parameters are, and what the method should return.
> >
> > Would some kind person mind clarifying this for me?
> >
> > Thanks
> >
> > Andy
> >
>
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