c</a></span><span class="op">(</span><span class="va">df.biv</span><span class="op">$</span><span class="va">grp1</span><span class="op">)</span><span class="op">)</span><span class="op">)</span></span>
<span>  <span class="fu"><a href="https://ggplot2.tidyverse.org/reference/ggplot.html" class="external-link">ggplot</a></span><span class="op">(</span>data <span class="op">=</span> <span class="va">df.biv.pred</span>, <span class="fu"><a href="https://ggplot2.tidyverse.org/reference/aes.html" class="externa