How to add significance lines and stars to a faceted figure in R with ggplot2 (CC095)

Ever wonder how to add lines and stars to a plot to indicate significance to a faceted plot? That's what we'll cover in this episode of Code Club! Pat will modify an existing figure to make it faceted using facet_wrap and facet_grid and then show how to add significance lines and stars at different positions for each panel of the figure using geom_segment and geom_text. Pat will use RStudio and functions from the #ggplot2 package including #facet_wrap, #geom_segment, #geom_text, and other packages from the tidyverse. The accompanying blog post can be found at https://www.riffomonas.org/code_club/2021-04-23-faceted-bars-stars. Do you have a figure that you would like to receive a critique or help improving? Let me know and I'd be happy to arrange a guest appearance! If you're interested in taking an upcoming 3 day R workshop, email me at riffomonas@gmail.com! R: https://r-project.org RStudio: https://rstudio.com Raw data: https://github.com/riffomonas/raw_data/releases/latest Workshops: https://www.mothur.org/wiki/workshops You can also find complete tutorials for learning R with the tidyverse using... Microbial ecology data: https://www.riffomonas.org/minimalR/ General data: https://www.riffomonas.org/generalR/ 0:00 Introduction 1:47 Revisiting plot with significance bars and stars 4:04 Creating faceted figure 9:45 Adding significance lines 16:07 Adding significnace labels 18:16 Adjusting the order of the panels 19:00 Why does this work?