#&gt; <span style='color: #949494;'># A tibble: 3 x 3</span>
#&gt;   `row/col` `1(A)` `2(B)`
#&gt;       <span style='color: #949494; font-style: italic;'>&lt;int&gt;</span>  <span style='color: #949494; font-style: italic;'>&lt;int&gt;</span>  <span style='color: #949494; font-style: italic;'>&lt;int&gt;</span>
#&gt; <span style='color: #BCBCBC;'>1</span>         1     <span style='color: #BB0000;'>NA</span>     <span style='color: #BB0000;'>NA</span>
#&gt; <span style='color: #BCBCBC;'>2</span>         2 