Encircle Data Points in R with geom_encircle() When working with scatter plots in R, it is often helpful to highlight or emphasize groups of data points. The ggalt package provides an elegant solution through the geom_encircle() function. This function automatically draws smooth, freehand-style contours around points, making it easy to highlight categories, clusters, or specific… Continue reading How to encircle a set of points in R with ggplot2