 class="va">O</span>, outdir <span class="op">=</span> <span class="cn">NULL</span>, params <span class="op">=</span> <span class="cn">NULL</span><span class="op">)</span></span>
<span></span>
<span><span class="fu">d</span><span class="op">(</span></span>
<span>  <span class="va">data</span>,</span>
<span>  <span class="va">W</span>,</span>
<span>  <span class="va">X</span>,</span>
<span>  <span class="va">Y</span>,</span>
<span>  <span class="va">Z</span>,</span>
<span>  quartets <span class="op">=</span>