lass="r-in"><span><span class="co"># summary of m2a</span></span></span>
<span class="r-in"><span><span class="fu"><a href="https://rdrr.io/r/base/summary.html" class="external-link">summary</a></span><span class="op">(</span><span class="va">m2a</span><span class="op">)</span></span></span>
<span class="r-out co"><span class="r-pr">#&gt;</span> Heterogenous linear mixed model </span>
<span class="r-out co"><span class="r-pr">#&gt;</span>      fitted by maximum likelihood method </span>
<span class="r-out c