r/base/c.html" class="external-link">c</a></span><span class="op">(</span><span class="st">"lmer_ri_1"</span>, <span class="st">"lmer_ri_2"</span>, </span>
<span>                          <span class="st">"lmer_rs_1"</span>, <span class="st">"lmer_rs_2"</span><span class="op">)</span>,</span>
<span>               controls <span class="op">=</span> <span class="st">"pop"</span><span class="op">)</span></span>
<span></span>
<span><span class="co"># Check specifications</span></span>
<span><span class="fu"><a 