Adding labels to individual % inside geom_bar() using R / ggplot2 [duplicate]

Answer 1

Maybe there is a way to do this in ggplot directly but with some pre-processing in dplyr, you'll be able to achieve your desired output.

library(dplyr)
library(ggplot2)

data %>%
  count(location, success) %>%
  group_by(location) %>%
  mutate(n = n/sum(n) * 100) %>%
  ggplot() + aes(x = location, n, fill = success,label = paste0(round(n, 2), "%")) +
  geom_bar(stat = "identity") +
  geom_text(position=position_stack(vjust=0.5))

Answer 2

How about creating a summary frame with the relative frequencies within location and then using that with geom_col() and geom_text()?

# Create summary stats
tots <-
  data %>%
  group_by(location,success) %>%
  summarise(
    n = n()
  ) %>%
  mutate(
    rel = round(100*n/sum(n)),
  )

# Plot
ggplot(data = tots, aes(x = location, y = n)) +
  geom_col(aes(fill = fct_rev(success))) + # could only get it with this reversed
  geom_text(aes(label = rel), position = position_stack(vjust = 0.5))

OUTPUT: