an><span class="op">)</span> <span class="op">+</span>
  <span class="fu">stat_summary</span><span class="op">(</span>fun.data <span class="op">=</span> <span class="st">"mean_se"</span>, geom <span class="op">=</span> <span class="st">"errorbar"</span>, width <span class="op">=</span> <span class="fl">.1</span>,
               position <span class="op">=</span> <span class="fu">position_dodge</span><span class="op">(</span>width <span class="op">=</span> <span class="fl">0.9</span><span class="op">)</span>