s cross tables, like all functions from
<code>mypdf1</code> you need to supply a <code>data.frame</code>, and in
this case two variables.</p>
<div class="sourceCode" id="cb8"><pre class="downlit sourceCode r">
<code class="sourceCode R"><span><span class="va">infert</span> <span class="op">|&gt;</span> </span>
<span>  <span class="fu">mypdf1</span><span class="fu">::</span><span class="fu"><a href="../reference/pdf1_cross_tbl.html">pdf1_cross_tbl</a></span><span class="op">(</span><span class="va">education