</span>,</span>
<span>  na_value <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="op">-</span><span class="fl">92</span>, <span class="op">-</span><span class="fl">91</span><span class="op">)</span></span>
<span><span class="op">)</span></span>
<span><span class="fu"><a href="https://rdrr.io/r/base/sort.html" class="external-link">sort</a></span><span class="op">(</span><span class="va">x3</span>, na.la