33"></span>
<span class="r-in"><span><span class="co"># use of custom luide guidance function</span></span></span>
<span class="r-in"><span><span class="va">lode_custom</span> <span class="op">&lt;-</span> <span class="kw">function</span><span class="op">(</span><span class="va">n</span>, <span class="va">i</span><span class="op">)</span> <span class="op">{</span></span></span>
<span class="r-in"><span>  <span class="fu"><a href="https://rdrr.io/r/base/stopifnot.html" class="external-link">stopifnot</a></sp