 all of the aede variables separate between at least two out of the three species."></p>
<p>Note that the variable <code>species</code> shows up twice in the plot - once as the rightmost variables, once as the leftmost one. <code>species</code> is a categorical variable. <code>ggpcp</code> deals with categorical variables by using the space on the y axis of a categorical variable to spread points out evenly. This allows us to (a) estimate the frequency of each level, and (b) track individual points through 