e>, not to the original row and/or column
names, as shown below.</p>
<div class="sourceCode" id="cb16"><pre class="downlit sourceCode r">
<code class="sourceCode R"><span><span class="va">m_pieces</span></span>
<span><span class="co">#&gt;                          Motors -&gt; MD Cars -&gt; MD LED lamps -&gt; Light</span></span>
<span><span class="co">#&gt; Electricity [from Coal]             1          2                  3</span></span>
<span><span class="co">#&gt; Electricity [from Solar]            4    