"><span>               type <span class="op">=</span> <span class="st">"outline"</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="fu"><a href="https://rdrr.io/r/base/c.html" class="external-link">c</a></span><span class="op">(</span><span class="fl">1</span>, 