Distinguishing Octave from Matlab

[José Luis García Pallero]

I usually use a function like this:

function [inOctave] = in_octave()
try
    OCTAVE_VERSION;
    inOctave = 1;
catch
    inOctave = 0;
end

What is the difference with the persistent inout =
exist("OCTAVE_VERSION","builtin") != 0; version?
Is the evaluation of exist() function faster than OCTAVE_VERSION and
try-catch statement?



2009/2/19 John W. Eaton <jwe at octave.org>

> On 19-Feb-2009, José Luis García Pallero wrote:
>
> | Here, you have possible solutions:
> |
> | http://www-old.cae.wisc.edu/pipermail/help-octave/2007-April/003809.html
> | http://www-old.cae.wisc.edu/pipermail/help-octave/2007-May/003814.html
>
> Probably the best solution is something similar to David's suggestion of:
>
>  function in = inoctave ()
>    persistent inout = exist("OCTAVE_VERSION","builtin") != 0;
>    in = inout;
>  endfunction
>
> but that won't work in Matlab, so you'll need to write it as
>
>  function retval = inoctave ()
>    persistent inout;
>    if (isempty (inout))
>      inout = exist ('OCTAVE_VERSION', 'builtin') ~= 0;
>    end
>    retval = inout;
>  end
>
>
> If this isn't in the FAQ, it should be.
>
> jwe
>



-- 
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José Luis García Pallero
jgpallero at gmail.com
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