an class="op">)</span> <span class="op">+</span></span>
<span>  <span class="co"># Add ref line to each glyph</span></span>
<span>   <span class="fu"><a href="../reference/add_ref_lines.html">add_ref_lines</a></span><span class="op">(</span><span class="op">)</span> <span class="op">+</span></span>
<span>  <span class="co"># Add glyph ribbon plots</span></span>
<span>   <span class="fu"><a href="../reference/geom_glyph_ribbon.html">geom_glyph_ribbon</a></span><span class="op">(</span><span class="op">)</spa