lc_sd</span><span class="op">)</span> <span class="op">{</span></span></span>
<span class="r-in"><span>    <span class="va">res_SD</span> <span class="op">&lt;-</span> <span class="fu"><a href="https://rdrr.io/r/base/apply.html" class="external-link">apply</a></span><span class="op">(</span><span class="va">x</span>, <span class="fl">2</span>, <span class="va">sd</span><span class="op">)</span></span></span>
<span class="r-in"><span>    <span class="va">res</span> <span class="op">&lt;-</span> <span class="