From help-octave-request at bevo dot che dot wisc dot edu  Mon Jan 22 04:00:02 2001
Subject: Re: .oct-files/ library-wrapper
From: Paul Kienzle <pkienzle at kienzle dot powernet dot co dot uk>
To: Ben Sapp <bsapp at lanl dot gov>
Cc: Daniel Heiserer <Daniel dot Heiserer at bmw dot de>,         "help-octave@bevo.che.wisc.edu" <help-octave@bevo.che.wisc.edu>
Date: Mon, 22 Jan 2001 02:50:23 +0000

On Fri, Jan 19, 2001 at 09:12:12AM -0700, Ben Sapp wrote:
> Daniel Heiserer wrote:
> > 
> > Hi,
> .
> .
> .
> > How do I define multiple output arguments is it the same
> > by just creating a list?
> > retval(1) = a;
> > retval(0) = b;
> 
> I don't think that will work.  Below is a small example that will work.
> You use the third arguement to your DLD function to find out how many
> arguements are asked for on the command line.   Then you add elements to
> the list by using the append and prepend member functions.  

Actually, Daniel's suggested style is used in the builtin DLD-FUNCTIONS, 
such as this example from lu.cc:

            case 3:
            default:
              retval(2) = fact.P ();
              retval(1) = fact.U ();
              retval(0) = fact.L ();
              break;

In fact there are no instances of append/prepend in the 2.1.31 
src/DLD-FUNCTIONS directory.

Paul Kienzle
pkienzle at kienzle dot powernet dot co dot uk




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