="fu"><a href="https://rdrr.io/r/stats/lm.html" class="external-link">lm</a></span><span class="op">(</span><span class="fu"><a href="https://rdrr.io/r/base/cbind.html" class="external-link">cbind</a></span><span class="op">(</span><span class="va">mb</span>, <span class="va">bh</span>, <span class="va">bl</span>, <span class="va">nh</span><span class="op">)</span> <span class="op">~</span> <span class="va">epoch</span>, data<span class="op">=</span><span class="va">Skulls</span><span class="op">)</span></s