From help-octave-request at bevo dot che dot wisc dot edu Sun Feb  1 07:58:44 2004
Subject: Re: varargout form a DLD function
From: Paul Kienzle <pkienzle at users dot sourceforge dot net>
To: Shai Ayal <shaia at biocontrol dot co dot il>
Cc: Geraint Paul Bevan <g dot bevan at eng dot gla dot ac dot uk>,    help-octave <help-octave@bevo.che.wisc.edu>
Date: Sun, 1 Feb 2004 08:54:21 -0500

No, you should be returning a cell array.

Lists are deprecated.  I don't have the
syntax memorized, but it should be
something like:

	Cell x(5,1);

	x(1) = 1;
	...

	retval(0) = x;
	return retval;

Paul Kienzle
pkienzle at users dot sf dot net

On Feb 1, 2004, at 8:51 AM, Shai Ayal wrote:

> Essentially you suggest returning a list for the function. This is a 
> nice trick which solves my problem completely
>
> Thanks for the help
>
> 	Shai
>
> Geraint Paul Bevan wrote:
>> -----BEGIN PGP SIGNED MESSAGE-----
>> Hash: SHA1
>> Shai Ayal wrote on 01/29/04 22:10:
>> | Hi all,
>> |
>> | I am trying to return a variable number of arguments from a DLD 
>> function
>> |
>> |
>> | however, I cannot recover these arguments at the command line:
>> |
>> | Note that if I know the number of arguments I can get them as in 
>> line 4.
>> | but what if I don't know beforehand ? Is there something similar to
>> | varargin{:} for output arguments ?
>> |
>> |     Shai
>> |
>> You can return a variable number of arguments by returning an
>> octave_value_list as the first element of retval:
>> ~/test:
>> $ cat varargouttest.cc
>> #include <octave/oct.h>
>> DEFUN_DLD (varargouttest, args, nargout, "")
>> {
>>     octave_value_list retval, retval2;
>>     for (int i = 4; i >= 0; i--) {
>>         retval2(i) = octave_value (1 + i);
>>     }
>>     retval(0) = retval2;
>>     nargout = 5;
>>     return retval;
>> }
>> ~/test:
>> $ mkoctfile varargouttest.cc
>> ~/test:
>> $ octave -q
>> octave:1> varargouttest
>> ans =
>> (
>> ~  [1] = 1
>> ~  [2] = 2
>> ~  [3] = 3
>> ~  [4] = 4
>> ~  [5] = 5
>> )
>> octave:2>
>> -----BEGIN PGP SIGNATURE-----
>> Version: GnuPG v1.2.2 (GNU/Linux)
>> iEYEARECAAYFAkAZNV8ACgkQcXV3N50QmNMEpQCeJaBEFPh/HYp4A3z7oOUOPAsi
>> RYgAn2qQ2c6/CJNeAgBbXDa/Ai/WqCjP
>> =5JaE
>> -----END PGP SIGNATURE-----
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> <shaia.vcf>



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