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<h4 class="subsection">A.2.7 Calling Other Functions in Mex-Files</h4>
<p>It is also possible call other Octave functions from within a mex-file
using <code>mexCallMATLAB</code>. An example of the use of
<code>mexCallMATLAB</code> can be see in the example below
<pre class="example"><pre class="verbatim"> #include "mex.h"
void
mexFunction (int nlhs, mxArray* plhs[], int nrhs,
const mxArray* prhs[])
{
char *str;
mexPrintf ("Hello, World!\n");
mexPrintf ("I have %d inputs and %d outputs\n", nrhs,
nlhs);
if (nrhs < 1 || ! mxIsString (prhs[0]))
mexErrMsgTxt ("function name expected");
str = mxArrayToString (prhs[0]);
mexPrintf ("I'm going to call the function %s\n", str);
mexCallMATLAB (nlhs, plhs, nrhs-1, prhs+1, str);
mxFree (str);
}
</pre></pre>
<p>If this code is in the file <samp><span class="file">myfeval.c</span></samp>, and is compiled to
<samp><span class="file">myfeval.mex</span></samp>, then an example of its use is
<pre class="example"> myfeval("sin", 1)
a = myfeval("sin", 1)
Hello, World!
I have 2 inputs and 1 outputs
I'm going to call the interpreter function sin
a = 0.84147
</pre>
<p>Note that it is not possible to use function handles or inline functions
within a mex-file.
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