transform = "reverse" does not work in scale_size_area() but does in every other size scaling function

[Lucielclr]

The transform = "reverse" argument does not work for scale_size_area() specifically.

Examples :

1. scale_size()
   p <- ggplot(CO2, aes(Plant, conc, size = uptake)) + geom_point(shape = 21) + scale_size(transform = "reverse", max_size = 5)

2. scale_size_area()
   p <- ggplot(CO2, aes(Plant, conc, size = uptake)) + geom_point(shape = 21) + scale_size_area(transform = "reverse")

[teunbrand]

Thanks for the report! The transform is doing as one expects, but because the data is rescaled to the maximum (which becomes negative due to the transform), we get right back to positive numbers again.

scales::rescale_max(scales::transform_reverse()$transform(1:5))
#> [1] 1 2 3 4 5

^{Created on 2025-03-06 with reprex v2.1.1}