an class="r-pr">#&gt;</span> (Intercept)        year      group1 year:group1 </span>
<span class="r-out co"><span class="r-pr">#&gt;</span> -2.51135823  0.23304276 -0.88784195 -0.05174851 </span>
<span class="r-in"><span></span></span>
<span class="r-in"><span><span class="co"># random effects</span></span></span>
<span class="r-in"><span><span class="fu"><a href="https://rdrr.io/r/utils/head.html" class="external-link">head</a></span><span class="op">(</span><span class="fu"><a href="methods.html">ranef</a