同事提出让注释“支棱”起来，首先想到的是ggforce中的geom_mark_ellipse，实践中遇到一些问题（比如，...
geom_mark_ellipse中的椭圆只是绘制了可以包围每组中的点的最小可能的椭圆。正如帮助文件所述：包围椭圆...
I am currently using ggforce v0.3.2 from CRAN (and ggplot2 v3.3.2) and encountered the same incorrect angle of the ellipses usinggeom_mark_ellipse(), although only for few cases in the following example. dta<-structure(list(grp=structure( c(3L,3L,3L,3L,4L,4L,4L,4L,5L,5L,5L,5L...