</span> <span class="op">=</span> <span class="fu"><a href="https://rdrr.io/r/base/list.html" class="external-link">list</a></span><span class="op">(</span><span class="va">mod1</span>, <span class="va">mod2</span>, <span class="va">mod3</span>, <span class="va">mod4</span><span class="op">)</span></span>
<span></span>
<span><span class="co"># name for each model</span></span>
<span><span class="va">labels</span> <span class="op">=</span> <span class="fu"><a href="https://rdrr.io/r/base/c.html" class="exter