an><span class="va">X</span> <span class="op">-</span> <span class="fu"><a href="atrans.html">atrans</a></span><span class="op">(</span><span class="va">S</span>, <span class="va">U</span><span class="op">)</span><span class="op">)</span></span></span>
<span class="r-out co"><span class="r-pr">#&gt;</span> , , 1</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> </span>
<span class="r-out co"><span class="r-pr">#&gt;</span>      [,1] [,2] [,3]</span>
<span class="r-out co"><span class="r-pr">#&gt