 in ascending order of the <code>group</code> column, named <code>cluster</code> in this example. If it is not sorted in this way, the relative order of the flows along the y-axis will not correspond to their order in the data.</p>
<div class="sourceCode" id="cb10"><pre class="downlit sourceCode r">
<code class="sourceCode R"><span class="va">node_row</span> <span class="op">&lt;-</span> 
  <span class="va">pbuilt</span><span class="op">$</span><span class="va">data</span><span class="op">[[</span><span cla