class="r-in"><span><span class="co"># unfortunately graphics::text() does not have vectorized adj</span></span></span>
<span class="r-in"><span><span class="co"># so it must iterate each row</span></span></span>
<span class="r-in"><span><span class="fu">graphics</span><span class="fu">::</span><span class="fu"><a href="https://rdrr.io/r/graphics/title.html" class="external-link">title</a></span><span class="op">(</span>main<span class="op">=</span><span class="st">"graphics::text() is not vectorized, text i