ggplot2: How to reposition break lines next to bars in geom_bar instead of at the middle of the bar?

Question

I have the following figure.

As you can see the breaklines for the x scale (which is scaled discrete in this case) go right through the different bars. I want to these breaklines to form "lanes" in which the bars are nicely fitted. So instead of having my breaks go through the bar, I would like them to lie at the edge of each bar.

I experimented a lot with the scale_x_discrete function but just can't seem to figure out how to achieve this...

Answer 1

You can create some fake gridlines using geom_vline while hiding the true gridlines.

library(tidyverse)

data <- data.frame(x = letters[1:10], y = runif(10), stringsAsFactors = FALSE)

data %>%
  ggplot(aes(x, y)) + 
  geom_bar(stat = "identity") + 
  coord_flip() + 
  geom_vline(xintercept = seq(1.5, 9.5, 1), color = "white") + 
  theme(panel.grid = element_blank())