How to choose the levels order of the fill variable with waffle::geom

I don't understand how I can change the levels order of the fill variable in R waffle::geom_waffle().

It seems that sorting the variable is ineffective since it's always sorted by the number of observations.

# First example
db_graph <- data.table::data.table(group = c("A", "B"),
                                   n     = c(13, 25))

ggplot2::ggplot(data    = db_graph,
                mapping = ggplot2::aes(fill   = group,
                                       values = n))  
  waffle::geom_waffle(flip = TRUE)

# Second example
db_graph <- db_graph[j = group := forcats::fct_rev(group)]

ggplot2::ggplot(data    = db_graph,
                mapping = ggplot2::aes(fill   = group,
                                       values = n))  
  waffle::geom_waffle(flip = TRUE)

CodePudding user response：

You could achieve your desired result by reordering your dataframe using e.g. setorder(db_graph, group). But you are right. I would have expected too that the order is determined by the order of the factor levels.

library(ggplot2)
library(data.table)
library(waffle)
library(forcats)

db_graph <- data.table::data.table(
  group = c("A", "B"),
  n = c(13, 25)
)

db_graph <- db_graph[j = group := fct_rev(group)]

ggplot(
  data = db_graph,
  mapping = aes(
    fill = group,
    values = n
  )
)  
  geom_waffle(flip = TRUE)

setorder(db_graph, group)

ggplot(
  data = db_graph,
  mapping = aes(
    fill = group,
    values = n
  )
)  
  geom_waffle(flip = TRUE)