pan> <span class="op">&lt;-</span> <span class="va">example_data</span><span class="op">$</span><span class="va">ID</span><span class="op">[</span><span class="va">coord_id</span><span class="op">]</span>
<span class="va">axis_values</span> <span class="op">&lt;-</span> <span class="va">example_data</span><span class="op">[</span><span class="va">flow_id</span>, <span class="fu"><a href="https://rdrr.io/r/base/c.html">c</a></span><span class="op">(</span><span class="st">'grp1'</span>, <span class="st">'grp