.frame</a></span>(<span class='no'>mice2</span>))</div><div class='output co'>#&gt;   id before after
#&gt; 1  1  187.2 429.5
#&gt; 2  2  194.2 404.4
#&gt; 3  3  231.7 405.6
#&gt; 4  4  200.5 397.2
#&gt; 5  5  201.7 377.9
#&gt; 6  6  235.0 445.8</div></pre>
  </div>
  <div class="col-md-3 hidden-xs hidden-sm" id="sidebar">
    <h2>Contents</h2>
    <ul class="nav nav-pills nav-stacked">
      
      <li><a href="#format">Format</a></li>
      
      <li><a href="#examples">Examples</a></li>
    </ul>

  </d