class="external-link">ggplot</a> to graph the
results.</li>
</ul>
</div>
<div class="section level2">
<h2 id="suggested-workflow">Suggested workflow<a class="anchor" aria-label="anchor" href="#suggested-workflow"></a>
</h2>
<div class="section level3">
<h3 id="prepare-for-collapse">Prepare for <em>collapse</em><a class="anchor" aria-label="anchor" href="#prepare-for-collapse"></a>
</h3>
<p>The <code>EnergyUK2000</code> data frame is similar to ‚Äúcleaned‚Äù data
from an external source: there are no