re>
<pre class="synopsis">[fval, feasible, idx, tb_value] = U.feval(x, function_name)</pre>
<pre class="synopsis">[fval, feasible, idx, tb_value] = feval(U, x, function_name)</pre>
<h2>Description</h2>
<p></p>
        Evaluates function for a given value of the point <tt>x</tt> over the union of polyhedra <tt>U</tt> characterized
        by the name <tt>function_name</tt>. If the string <tt>function_name</tt> is omitted, it is assumed that only one 
        function is attached to the union.
        The dim