class="co"># initial values.</span></span></span>
<span class="r-in"><span></span></span>
<span class="r-in"><span><span class="co">### homogeneous linear mixed model (standard linear mixed model) </span></span></span>
<span class="r-in"><span><span class="co">### with correlated random-effects</span></span></span>
<span class="r-in"><span><span class="va">m1</span><span class="op">&lt;-</span><span class="fu">hlme</span><span class="op">(</span><span class="va">Y</span><span class="op">~</span><span class=