ggplot2: Creating a visually intuitive timeline in R [closed]
问题 Closed . This question is opinion-based. It is not currently accepting answers. Want to improve this question? Update the question so it can be answered with facts and citations by editing this post. Closed 2 years ago . Do any ggplot2 wizards out there know how to make this look more visually intuitive? Specifically, I'm thinking of annotation at the beginning and end of each time period with the exact date (i.e., for Zhenla the bar would begin with an annotation saying 550 AD, and end with