pan> <span class="st">"n_re"</span>,</span></span>
<span class="r-in"><span>                   label <span class="op">=</span> <span class="st">"Change this to render the following plot"</span>,</span></span>
<span class="r-in"><span>                   choices <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">10</span>, <span class="fl">20</span>, <span class="fl">35</span>, <span class="fl">50</span