 <span class="cn">NULL</span>,</span>
<span>  outdir <span class="op">=</span> <span class="cn">NULL</span>,</span>
<span>  f4mode <span class="op">=</span> <span class="cn">FALSE</span>,</span>
<span>  params <span class="op">=</span> <span class="cn">NULL</span></span>
<span><span class="op">)</span></span>
<span></span>
<span><span class="fu">f4</span><span class="op">(</span><span class="va">data</span>, <span class="va">W</span>, <span class="va">X</span>, <span class="va">Y</span>, <span class="va">Z<