"r-in"><span><span class="va">x</span> <span class="op">&lt;-</span> <span class="va">mtcars</span><span class="op">$</span><span class="va">mpg</span></span></span>
<span class="r-in"><span></span></span>
<span class="r-in"><span><span class="fu">csd</span><span class="op">(</span><span class="va">x</span><span class="op">)</span></span></span>
<span class="r-out co"><span class="r-pr">#&gt;</span>  [1]       NaN 0.0000000 1.0392305 0.8544004 1.4737707 1.7663522 2.8445436</span>
<span class="r-out co"><spa