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<a name="Cell-Arrays-in-Oct_002dFiles"></a>
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<p>
Next: <a href="Structures-in-Oct_002dFiles.html#Structures-in-Oct_002dFiles" accesskey="n" rel="next">Structures in Oct-Files</a>, Previous: <a href="Character-Strings-in-Oct_002dFiles.html#Character-Strings-in-Oct_002dFiles" accesskey="p" rel="prev">Character Strings in Oct-Files</a>, Up: <a href="Oct_002dFiles.html#Oct_002dFiles" accesskey="u" rel="up">Oct-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="Cell-Arrays-in-Oct_002dFiles-1"></a>
<h4 class="subsection">A.1.4 Cell Arrays in Oct-Files</h4>
<p>Octave’s cell type is also available from within oct-files. A cell
array is just an array of <code>octave_value</code>s, and thus each element of the
cell array can be treated just like any other <code>octave_value</code>. A simple
example is
</p>
<div class="example">
<pre class="verbatim">#include <octave/oct.h>
#include <octave/Cell.h>
DEFUN_DLD (celldemo, args, , "Cell Demo")
{
octave_value_list retval;
int nargin = args.length ();
if (nargin != 1)
print_usage ();
else
{
Cell c = args(0).cell_value ();
if (! error_state)
for (octave_idx_type i = 0; i < c.numel (); i++)
{
retval(i) = c(i); // using operator syntax
//retval(i) = c.elem (i); // using method syntax
}
}
return retval;
}
</pre><pre class="example">
</pre></div>
<p>Note that cell arrays are used less often in standard oct-files and so
the <samp>Cell.h</samp> header file must be explicitly included. The rest of the
example extracts the <code>octave_value</code>s one by one from the cell array and
returns them as individual return arguments. For example:
</p>
<div class="example">
<pre class="example">[b1, b2, b3] = celldemo ({1, [1, 2], "test"})
⇒
b1 = 1
b2 =
1 2
b3 = test
</pre></div>
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