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<a name="Structure_002dbased-user-functions"></a>
<div class="header">
<p>
Next: <a href="Structure_002dbased-gradients-and-Hessians.html#Structure_002dbased-gradients-and-Hessians" accesskey="n" rel="next">Structure-based gradients and Hessians</a>, Up: <a href="Parameter-structures.html#Parameter-structures" accesskey="u" rel="up">Parameter structures</a> &nbsp; [<a href="Function-index.html#Function-index" title="Index" rel="index">Index</a>]</p>
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<hr>
<a name="Specify-which-user-functions-accept-parameter-structures"></a>
<h3 class="section">10.1 Specify which user functions accept parameter structures</h3>
<a name="index-structure_002dbased-user-functions"></a>

<p>The frontend must be told which user functions accept parameter
structures by setting corresponding settings to <code>true</code>. The names
of these settings depend on which user functions are applicable to the
respective frontend and are shown in the following table.
</p>
<table>
<thead><tr><th>User function</th><th>Setting</th><th>Frontends</th></tr></thead>
<tr><td>Objective function</td><td><code>objf_pstruct</code></td><td><code>nonlin_min</code></td></tr>
<tr><td>Gradient</td><td><code>grad_objf_pstruct</code></td><td><code>nonlin_min</code></td></tr>
<tr><td>Hessian</td><td><code>hessian_objf_pstruct</code></td><td><code>nonlin_min</code></td></tr>
<tr><td>Model function</td><td><code>f_pstruct</code></td><td><code>nonlin_residmin</code>, <code>nonlin_curvefit</code>, <code>residmin_stat</code>, <code>curvefit_stat</code></td></tr>
<tr><td>Jacobian</td><td><code>df_pstruct</code></td><td><code>nonlin_residmin</code>, <code>nonlin_curvefit</code>, <code>residmin_stat</code>, <code>curvefit_stat</code></td></tr>
<tr><td>General inequality constraints</td><td><code>f_inequc_pstruct</code></td><td><code>nonlin_min</code>, <code>nonlin_residmin</code>, <code>nonlin_curvefit</code></td></tr>
<tr><td>Jacobian of general inequality constraints</td><td><code>df_inequc_pstruct</code></td><td><code>nonlin_min</code>, <code>nonlin_residmin</code>, <code>nonlin_curvefit</code></td></tr>
<tr><td>General equality constraints</td><td><code>f_equc_pstruct</code></td><td><code>nonlin_min</code>, <code>nonlin_residmin</code>, <code>nonlin_curvefit</code></td></tr>
<tr><td>Jacobian of general equality constraints</td><td><code>df_equc_pstruct</code></td><td><code>nonlin_min</code>, <code>nonlin_residmin</code>, <code>nonlin_curvefit</code></td></tr>
</table>





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