span><span class='va'>x</span><span class='op'>)</span><span class='op'>{</span></span>
<span class='r-in'><span class='op'>(</span><span class='fu'><a href='https://rdrr.io/r/stats/cor.html'>var</a></span><span class='op'>(</span><span class='va'>x</span>, na.rm<span class='op'>=</span><span class='cn'>TRUE</span><span class='op'>)</span><span class='op'>-</span><span class='fu'><a href='https://rdrr.io/r/base/mean.html'>mean</a></span><span class='op'>(</span><span class='va'>x</span>, na.rm<span class='o