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<title>Cell Arrays in Oct-Files - Untitled</title>
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<h4 class="subsection">A.1.4 Cell Arrays in Oct-Files</h4>
<p>Octave's cell type is equally accessible within oct-files. A cell
array is just an array of <code>octave_value</code>s, and so each element of the cell
array can then be treated just like any other <code>octave_value</code>. A simple
example is
<pre 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.nelem (); i++)
retval(i) = c.elem (i);
}
return retval;
}
</pre>
</pre>
<p>Note that cell arrays are used less often in standard oct-files and so
the <samp><span class="file">Cell.h</span></samp> header file must be explicitly included. The rest of this
example extracts the <code>octave_value</code>s one by one from the cell array and
returns be as individual return arguments. For example consider
<pre class="example"> [b1, b2, b3] = celldemo ({1, [1, 2], "test"})
b1 = 1
b2 =
1 2
b3 = test
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