    <blockquote>
        <b>quad_mesh_order1_display</b> ( <i>'prefix'</i> )
      </blockquote>
      where <i>'prefix'</i> is the common file prefix:
      <ul>
        <li>
          <i>'prefix'</i>_nodes.txt, lists the node coordinates;
        </li>
        <li>
          <i>'prefix'</i>_elements.txt lists the indices of nodes that form elements.
        </li>
        <li>
          <i>'prefix'</i>_values.txt lists the value to be assigned each element.
        </li>
      </ul>
      reads the data an