Customising X-axis on Stacked Bar Graph GGplot2

Question

I would appreciate some help with changing the axis titles given the format of my current ggplot.

I've tried the usual arguments such as scale_x_discrete() and adding the associated labels, yet with no success.

However, overall, my goal is to keep the current format of the stacked bar, yet change 1,2,3 on the x-axis to "Cluster A" "Cluster B" "Cluster C."

Would really appreciate if someone could show me how to encode this while keeping the current format.

install.packages("ggplot2")
install.packages("viridis")
install.packages("hrbrthemes")

library(ggplot2)
library(viridis)
library(hrbrthemes)


x1 = rep(1:3, times = 5)
x2 = rep(0:4, times = 3)
x2 <- as.factor(x2)

df <- data.frame(x1,x2)
str(df)

ggplot(df, aes(x= x1, fill = x2), color = "x2") +
  scale_x_reverse() +
  geom_bar(position = position_fill(reverse = TRUE), stat="count") +
  theme_ipsum(axis = TRUE, grid = FALSE, axis_col = "black", axis_title_size = 10) +
  theme(plot.title = element_text(hjust = 0.5, size = 11, face = "bold"),
        axis.text = element_text(size = 11)) +
  scale_fill_viridis_d(option = "B")+
  coord_flip() 

Answer 1

As you have a continuous scale you have to set the labels and the breaks using scale_x_continuous or scale_x_reverse:

library(ggplot2)
library(viridis)
library(hrbrthemes)

x1 <- rep(1:3, times = 5)
x2 <- rep(0:4, times = 3)
x2 <- as.factor(x2)

df <- data.frame(x1, x2)

ggplot(df, aes(x = x1, fill = x2), color = "x2") +
  geom_bar(position = position_fill(reverse = TRUE), stat = "count") +
  theme_ipsum(axis = TRUE, grid = FALSE, axis_col = "black", axis_title_size = 10) +
  theme(
    plot.title = element_text(hjust = 0.5, size = 11, face = "bold"),
    axis.text = element_text(size = 11)
  ) +
  scale_fill_viridis_d(option = "B") +
  scale_x_reverse(breaks = 1:3, labels = paste("Cluster", LETTERS[1:3])) +
  coord_flip()