/span></span>
<span><span class="co">#&gt;       guitarists Ringo</span></span>
<span><span class="co">#&gt; duck           6     4</span></span>
<span><span class="co">#&gt; duck          18     8</span></span>
<span><span class="co">#&gt; goose         30    12</span></span></code></pre></div>
<p>Note that rows and columns of aggregated matrices are always sorted
alphabetically.</p>
<div class="sourceCode" id="cb5"><pre class="downlit sourceCode r">
<code class="sourceCode R"><span><span class="va">m</spa