 table. The frequency table may be constructed from <code><a href="https://rdrr.io/r/stats/xtabs.html" class="external-link">xtabs</a></code>, <code><a href="https://rdrr.io/r/base/table.html" class="external-link">table</a></code>, or be in the form of a matrix or a data.frame (as if read in from an external data file).</p>
    </div>
    <div class="section level2">
    <h2 id="see-also">See also<a class="anchor" aria-label="anchor" href="#see-also"></a></h2>
    <div class="dont-index"><p>See <code><a hr