downlit sourceCode r">
<code class="sourceCode R"><span><span class="fu"><a href="https://rdrr.io/r/stats/vcov.html" class="external-link">vcov</a></span><span class="op">(</span><span class="va">mod_1</span>, id <span class="op">=</span> <span class="fl">40</span><span class="op">)</span></span>
<span><span class="co">#&gt; $`40`</span></span>
<span><span class="co">#&gt;                 t1            t2            dt             k          beta</span></span>
<span><span class="co">#&gt; t1    6.640964e-02