" class="external-link">c</a></span><span class="op">(</span><span class="st">"numeric"</span>, <span class="st">"double"</span><span class="op">)</span>, <span class="fl">1</span><span class="op">)</span> <span class="co"># TRUE</span></span></span>
<span class="r-out co"><span class="r-pr">#&gt;</span> [1] TRUE</span>
<span class="r-in"><span>  <span class="fu">check_type</span><span class="op">(</span><span class="fu"><a href="https://rdrr.io/r/base/matrix.html" class="external-link">matrix</a></span><