ec(NA,<span class="num">3</span>,<span class="num">5</span>), <span class="lit">'b'</span>-&gt;Vec(NA,<span class="num">9</span>,<span class="num">11</span>))</pre></div><dl class="paramcmts block"><dt class="tparam">RX</dt><dd class="cmt"><p>The type of row keys</p></dd><dt class="tparam">CX</dt><dd class="cmt"><p>The type of column keys</p></dd><dt class="tparam">T</dt><dd class="cmt"><p>The type of entries in the frame
</p></dd></dl></div>
    </li><li name="org.saddle.Index" visbl="pub" data-isabs="true