me4</span><span class="fu">::</span><span class="fu"><a href="https://rdrr.io/pkg/lme4/man/lmer.html">lmer</a></span><span class="op">(</span><span class="va">Reaction</span> <span class="op">~</span> <span class="va">Days</span> <span class="op">+</span> <span class="op">(</span><span class="va">Days</span><span class="op">|</span><span class="va">Subject</span><span class="op">)</span>, data <span class="op">=</span> <span class="va">sleepstudy</span><span class="op">)</span> </code></pre></div>
<p>We cal