In this post, we will learn how to encircle data points with ggplot2. In R, there are multiple ways to highlight/annotate data points. Here we will use, ggalt, one of the ggplot2 extension packages to encircle data points. ggalt‘s geom_encircle() function can automagically encircle points belonging to multiple groups. Setting data and packages First, let… Continue reading How to encircle a set of points in R with ggplot2