<span><span class="va">plt2</span>  <span class="op">&lt;-</span> <span class="fu"><a href="https://rdrr.io/pkg/gridExtra/man/arrangeGrob.html" class="external-link">grid.arrange</a></span><span class="op">(</span><span class="va">plt2a</span>,<span class="va">plt2b</span>,ncol<span class="op">=</span><span class="fl">2</span><span class="op">)</span></span></span>
<span class="r-plt img"><img src="dataFigure2-1.png" alt="" width="700" height="433"></span>
<span class="r-in"><span></span></span>
<span class