a></span><span class="op">(</span><span class="fl">1</span>,<span class="fl">2</span>,<span class="fl">2</span>,<span class="fl">2</span>,<span class="fl">4</span><span class="op">)</span><span class="op">]</span>,levels <span class="op">=</span> <span class="va">LETTERS</span>, ordered<span class="op">=</span><span class="cn">TRUE</span><span class="op">)</span></span></span>
<span class="r-in"><span><span class="fu">ad_test</span><span class="op">(</span><span class="va">vec1</span>,<span class="va">vec2<