ass="op">-</span><span class="fl">1</span><span class="op">)</span></span>
<span>    <span class="co"># rename the metric column so its found for modelling</span></span>
<span>    <span class="va">o</span><span class="op">$</span><span class="va">the_metric</span> <span class="op">&lt;-</span> <span class="va">o</span><span class="op">[</span>, <span class="va">metric</span><span class="op">]</span></span>
<span>    </span>
<span>    <span class="va">o</span></span>
<span>    </span>
<span> <span class="op"