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<a name="How-to-Distinguish-Between-Octave-and-Matlab"></a>
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Previous: <a href="How-To-Get-Help-with-Octave.html#How-To-Get-Help-with-Octave" accesskey="p" rel="prev">How To Get Help with Octave</a>, Up: <a href="Trouble.html#Trouble" accesskey="u" rel="up">Trouble</a> &nbsp; [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Concept-Index.html#Concept-Index" title="Index" rel="index">Index</a>]</p>
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<a name="How-to-Distinguish-Between-Octave-and-Matlab-1"></a>
<h3 class="appendixsec">D.4 How to Distinguish Between Octave and Matlab</h3>
<a name="index-Octave-and-MATLAB_002c-how-to-distinguish-between"></a>

<p>Octave and <small>MATLAB</small> are very similar, but handle Java slightly different.
Therefore it may be necessary to detect the environment and use the appropriate
functions.  The following function can be used to detect the environment.  Due
to the persistent variable it can be called repeatedly without a heavy
performance hit.
</p>
<p>Example:
</p>
<div class="example">
<pre class="example">%%
%% Return: true if the environment is Octave.
%%
function retval = isOctave
  persistent cacheval;  % speeds up repeated calls

  if isempty (cacheval)
    cacheval = (exist (&quot;OCTAVE_VERSION&quot;, &quot;builtin&quot;) &gt; 0);
  end

  retval = cacheval;
end
</pre></div>






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