
<span>  x0 <span class="op">=</span> <span class="fu"><a href="https://rdrr.io/r/base/mean.html" class="external-link">mean</a></span><span class="op">(</span><span class="va">ef</span><span class="op">)</span>,</span>
<span>  k <span class="op">=</span> <span class="fl">1</span><span class="op">/</span><span class="fl">4</span>,</span>
<span>  L <span class="op">=</span> <span class="fu"><a href="https://rdrr.io/r/base/Extremes.html" class="external-link">max</a></span><span class="op">(</span><span class