./../fig/mpt/modules/geometry/unions/@PolyUnion/feval13.png">. <pre class="programlisting"> x = P.interiorPoint.x; </pre>
<pre class="programlisting"></pre>
<pre class="programlisting"> y = U.feval(x,'a') </pre>
<pre class="programlisting">
y =

        -0.520345123015406

</pre> Evaluate function a with respect to a tie-breaking function 'b' <pre class="programlisting"> yn = U.feval(x,'a','tiebreak','b') </pre>
<pre class="programlisting">
yn =

        -0.520345123015406

</pre>
<h2>See Also</h2>
<a href=