<code class="sourceCode R"><span><span class="va">UKEnergy2000_with_metadata</span> <span class="op">&lt;-</span> <span class="va">UKEnergy2000</span> <span class="op"><a href="../reference/pipe.html">%&gt;%</a></span> </span>
<span>  <span class="co"># Add a column indicating the matrix in which this entry belongs (U, V, or Y).</span></span>
<span>  <span class="fu">matsindf</span><span class="fu">:::</span><span class="fu"><a href="../reference/add_UKEnergy2000_matnames.html">add_UKEnergy2000_matnames</a>