them, producing a third index</p></div><dl class="paramcmts block"><dt class="param">ix1</dt><dd class="cmt"><p>Left index</p></dd><dt class="param">ix2</dt><dd class="cmt"><p>Right index
</p></dd></dl></div>
    </li><li name="org.saddle.index.Stacker#ord" visbl="pub" data-isabs="true" fullComment="no" group="Ungrouped">
      <a id="ord:org.saddle.ORD[O]"></a>
      <a id="ord:ORD[O]"></a>
      <h4 class="signature">
      <span class="modifier_kind">
        <span class="modifier">abstract </span>
     