an></span></span>
<span class="r-in"><span><span class="va">ef</span> <span class="op">&lt;-</span></span></span>
<span class="r-in"><span>  <span class="va">contours</span><span class="op">[[</span><span class="fl">1</span><span class="op">]</span><span class="op">]</span> <span class="op">|&gt;</span></span></span>
<span class="r-in"><span>  <span class="fu"><a href="efourier.html">efourier</a></span><span class="op">(</span>nharm <span class="op">=</span> <span class="fl">30</span><span class="op">)</spa