ggplot2: Add p-value to grouped box plots

Question

I am trying to add p_values to my graph using \"stat_signif\" function.
The problem is that my boxplots are grouped box plots where I want to compare every 2 box plots of th

Answer 1

You haven't posted enough data to get p-values, so I'm posting an example that you can adjust to your dataset:

library(tidyverse)
library(ggpubr)

mtcars %>%
  mutate_at(vars(am, cyl), as.factor) %>%
  ggplot(aes(cyl, disp, fill=am))+
  geom_boxplot()+
  stat_compare_means(aes(group = am))

You can usestat_compare_means(aes(group = am), label = "p.format") if you want to have only the p values in your plot.