s="downlit sourceCode r">
<code class="sourceCode R"><span class="co"># incorrect:</span>
<span class="fu"><a href="../reference/hlm_resid.default.html">hlm_resid</a></span><span class="op">(</span><span class="va">fm1.NA</span><span class="op">)</span> 
<span class="co">#&gt; Error in hlm_resid.lmerMod(fm1.NA): Please provide the data frame used to fit the model. This is necessary when the na.action is set to na.exclude</span>

<span class="co"># correct:</span>
<span class="fu"><a href="../reference/hlm_r