The I function does not work as expected on categorical y axis and numeric x axis

[davidhodge931]

Note behaviour of the annotated label in p2 below. I would have expected it to match that in p1

library(tidyverse)
library(palmerpenguins)
library(patchwork)

p1 <- penguins |>
  ggplot() +
  geom_point(
    aes(x = flipper_length_mm, 
        y = body_mass_g),
  ) +
  annotate("label", x = I(0.2), y = I(0.8), label = "Here")

p2 <- penguins |> 
  ggplot() +
  geom_bar(
    aes(y = sex, fill = species), position = "dodge",
  ) +
  annotate("label", x = I(0.2), y = I(0.8), label = "Here") 

p1 + p2

[teunbrand]

Thanks for the report! I agree this is a bug

[teunbrand]

Simplified reprex, the label should be in the right part of the plot:

library(ggplot2)

ggplot(mpg, aes(drv, displ)) +
  geom_boxplot() +
  annotate("label", label = "foobar", x = I(0.75), y = 2)

^{Created on 2025-01-29 with reprex v2.1.1}

The issue is caused by this here code:

ggplot2/R/scale-discrete-.R

Line 177 in 1bfb3c9

rescale(self$map(x, limits = limits), from = range)

Where the scale maps AsIs variables to the <mapped_discrete> class, thereby skipping the rescale.AsIs method.