rdrr.io/r/base/dim.html" class="external-link">dim</a></span><span class="op">(</span><span class="va">tmp</span><span class="op">)</span></span></span>
<span class="r-out co"><span class="r-pr">#&gt;</span> [1] 12  3</span>
<span class="r-in"><span><span class="fu"><a href="https://rdrr.io/r/base/dim.html" class="external-link">dim</a></span><span class="op">(</span><span class="fu">only_joint</span><span class="op">(</span><span class="va">tmp</span>, .variables <span class="op">=</span> <span class="va">