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Next: <a href="Nested-Functions.html#Nested-Functions" accesskey="n" rel="next">Nested Functions</a>, Previous: <a href="Subfunctions.html#Subfunctions" accesskey="p" rel="prev">Subfunctions</a>, Up: <a href="Function-Files.html#Function-Files" accesskey="u" rel="up">Function Files</a> [<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="Private-Functions-1"></a>
<h4 class="subsection">11.9.3 Private Functions</h4>
<p>In many cases one function needs to access one or more helper
functions. If the helper function is limited to the scope of a single
function, then subfunctions as discussed above might be used. However,
if a single helper function is used by more than one function, then
this is no longer possible. In this case the helper functions might
be placed in a subdirectory, called "private", of the directory in which
the functions needing access to this helper function are found.
</p>
<p>As a simple example, consider a function <code>func1</code>, that calls a helper
function <code>func2</code> to do much of the work. For example:
</p>
<div class="example">
<pre class="example">function y = func1 (x)
y = func2 (x);
endfunction
</pre></div>
<p>Then if the path to <code>func1</code> is <code><directory>/func1.m</code>, and if
<code>func2</code> is found in the directory <code><directory>/private/func2.m</code>,
then <code>func2</code> is only available for use of the functions, like
<code>func1</code>, that are found in <code><directory></code>.
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