<span class="va">df</span><span class="op">$</span><span class="va">lcat10</span><span class="op">)</span> <span class="op">)</span></span></span>
<span class="r-out co"><span class="r-pr">#&gt;</span> </span>
<span class="r-out co"><span class="r-pr">#&gt;</span>  20  50  60  70  80  90 100 110 120 130 140 150 </span>
<span class="r-out co"><span class="r-pr">#&gt;</span>   1   1   5   7  10  24  19  19   7   3   3   1 </span>
<span class="r-in"><span></span></span>
<span class="r-in"><span><span class="co