an class="r-pr">#&gt;</span> </span>
<span class="r-msg co"><span class="r-pr">#&gt;</span>     extent</span>
<span class="r-in"><span><span class="va">dem</span> <span class="op">&lt;-</span> <span class="fu">sim_dem</span><span class="op">(</span>L <span class="op">=</span> <span class="fl">32</span>, smoothness <span class="op">=</span> <span class="fl">0.5</span><span class="op">)</span></span></span>
<span class="r-in"><span><span class="fu"><a href="https://rdrr.io/r/base/plot.html" class="external-li