n></span></span>
<span class="r-in"><span></span></span>
<span class="r-in"><span><span class="fu">efourier_error</span><span class="op">(</span><span class="va">ef</span><span class="op">)</span></span></span>
<span class="r-in"><span></span></span>
<span class="r-in"><span><span class="fu">efourier_error</span><span class="op">(</span><span class="va">ef</span>,</span></span>
<span class="r-in"><span>               nharm <span class="op">=</span> <span class="fl">30</span>,</span></span>
<span class="r-in