eta</a></span><span class="op">(</span><span class="fl">1</span>, <span class="fl">3</span><span class="op">)</span><span class="op">)</span>,</span></span>
<span class="r-in"><span>    alpha <span class="op">=</span> <span class="fl">0.25</span></span></span>
<span class="r-in"><span>  <span class="op">)</span> <span class="op">+</span></span></span>
<span class="r-in"><span>  <span class="fu"><a href="stat_slab.html">stat_slab</a></span><span class="op">(</span><span class="fu"><a href="https://ggplot2.ti