Re: Cell support for deblank

[Keith Goodman]

On 6/8/05, David Bateman <address@hidden> wrote:
> Keith Goodman wrote:
> 
> >Understood. But a "which -all" is still very useful if anyone feels
> >like making one.
> >
> >
> >
> Its not  that difficult to implement a simple version of "which -all".
> One of the advantages of octave over its close source competitors is
> that with the source being open, the users can propose a patch for the
> feature they want, and in all likelihood see this patch included in a
> very short delay. That's how open source programs become more feature
> rich...
> 
> As for "which -all" there is one complication. The octave dispatch
> function allows function overloading in a manner similar but different
> to matlab classes. Strictly speaking "which -all <fun>" should also
> return all of the overloaded functions of <fun> as well with an
> indication of the type they are used for. Consider
> 
> octave:1> dispatch("inv")
> Overloaded function inv
> inv(galois,...)->ginv(galois,...)
> inv(sparse bool matrix,...)->spinv(sparse bool matrix,...)
> inv(sparse complex matrix,...)->spinv(sparse complex matrix,...)
> inv(sparse matrix,...)->spinv(sparse matrix,...)
> 
> Therefore "which -all inv" for me should return
> 
> /opt/octave-2.9/libexec/octave/2.9.3/site/oct/i686-pc-linux-gnu/octave-forge/ginv.oct
> # galois
> /opt/octave-2.9/libexec/octave/2.9.3/oct/i686-pc-linux-gnu/spinv.oct  #
> sparse bool matrix
> /opt/octave-2.9/libexec/octave/2.9.3/oct/i686-pc-linux-gnu/spinv.oct  #
> sparse complex matrix
> /opt/octave-2.9/libexec/octave/2.9.3/oct/i686-pc-linux-gnu/spinv.oct  #
> sparse matrix
> inv is a built-in function
> 
> Its not clear to me the best way to treat that case....

I don't understand the subtleties, but unfortunately that doesn't stop
me from clogging up the mailing list with my comments:

To my way of thinking there are only three functions: ginv, spinv, and
inv. So I'd only output three lines:

/opt/octave-2.9/libexec/octave/2.9.3/site/oct/i686-pc-linux-gnu/octave-forge/ginv.oct
# galois
/opt/octave-2.9/libexec/octave/2.9.3/oct/i686-pc-linux-gnu/spinv.oct  # sparse
inv is a built-in function # Shadowed

Here's the patented, copyrighted, and trademarked output of Matlab:

>> which -all inv
/usr/local/matlab/toolbox/matlab/matfun/@single/inv.bi  % single method
/usr/local/matlab/toolbox/matlab/matfun/@double/inv.bi  % double method
/usr/local/matlab/toolbox/matlab/matfun/inv.m           % Shadowed

(on my screen the %'s are lined up)