pan><span class="op">$</span><span class="va">STAT</span> <span class="op">==</span> <span class="st">"diff"</span>, <span class="st">"STATVAL"</span><span class="op">]</span><span class="op">[[</span><span class="fl">1</span><span class="op">]</span><span class="op">]</span></span>
<span>    <span class="va">diff_se</span> <span class="op">&lt;-</span> <span class="va">marginal_results</span><span class="op">[</span><span class="va">marginal_results</span><span class="op">$</span><span class="va">STAT</spa