n>
<span class="r-out co"><span class="r-pr">#&gt;</span> 18   0.366577034</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> 19  -0.659141372</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> 20  -1.326991499</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> 21   0.784043889</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> 22   0.488644560</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> 23   1.035494636</span>
<span class="r-out co"><span class=