I asked a question before but I think it was not quite clear. Here, I try to elaborate the details.

We have this data frame

t = c(0, 1, 2, 3, 4, 5, 6)
x = c("b", "b", "w", "w", "b", "b", "b")
y = c("b", "b", "b", "b", "w", "w", "w")
df = data.frame(t, x, y)

and would like to have a flipped stacked bar plot using ggplo2 in R.

I am using this code

colors <- c("b" = "black", "w" = "white")
df_long <- pivot_longer(df, cols = c("x", "y"), names_to = "variable", values_to = "value")
df_long$value <- factor(df_long$value, levels = c("b", "w"))

to define the colors, and this code for plotting

ggplot(df_long, aes(x = variable, fill = value)) +
  geom_bar(position = position_stack(reverse = FALSE)) +
  scale_fill_manual(values = colors) +
  coord_flip()

Ideally, for x, we should get black-white-black and for y, it should be black-white but when I run this code, I’m getting a very messed up plot which for both x and y is white-black(the platform doesn’t allow me to post an image of the plot).

I checked the structure of both df and df_long and they make sense but I’m not sure what’s happening with the ggplot function. Could someone help?