rnal-link">aes</a></span><span class="op">(</span><span class="va">DB1</span>, <span class="va">DB2</span>, label <span class="op">=</span> <span class="va">ord</span><span class="op">[</span><span class="fl">1</span><span class="op">:</span><span class="fl">4</span><span class="op">]</span><span class="op">)</span>, nudge_x <span class="op">=</span> <span class="fl">0.5</span><span class="op">)</span> <span class="op">+</span> <span class="fu"><a href="https://ggplot2.tidyverse.org/reference/ggtheme.html" 