Re: MATLAB / Octave differences [Was: Function ending.]

[Shai Ayal]

John Darrington wrote:
> Thanks to all those who replied to me.  The problem turned out to be
> unrelated to this issue. 
>
> It seems that the behaviour of the "which" command is different.  In
> the case where "name" is undefined, which("name") returns "undefined"
> in Octave, but in MATLAB it returns an empty result.
>
> The code I was trying to run relied upon the MATLAB behaviour.
>
> Is there a flag which will change this?
>
> J'

I don't know about a flag, but as a workaround you could check the 
output of which for "undefined" as well, e.g. (untested code)

tt = which(name);
exist_flag = 1;
if(~isempty(tt))
 if(strcmp(tt,"undefined"))
   exist_flag=0;
 end
else
 exist_flag = 0;
end

"exist_flag" will now tell you if name is defined.
also, you might have a look at the "exist" command

Shai


> On Wed, Jul 19, 2006 at 09:33:53AM +0800, John Darrington wrote:
> > I've been trying to get some MATLAB code to work with Octave.
> >
> > The most obvious difference between the two programs is that MATLAB
> > expects functions to be closed with "end" whereas Octave expects
> > "endfunction", even when running with --traditional.
> >
> > Looking at the FAQ, http://www.gnu.org/software/octave/FAQ.html#SEC24
> > it cites three categories of differences:
> >
> >    1. Irrelevant.
> >    2. Known differences, perhaps configurable with a user preference variable.
> >    3. Unknown differences. 
> >
> > Clearly this doesn't belong to the #1 and it's not mentioned anywhere in
> > the documentation, so despite this difference being extremely obvious,
> > I have to conclude that it's an "Unknown difference".
> >
> > Does anyone have any ideas on how to overcome this problem?
> >
> > To whom should I report this Unknown Difference?
>
>
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