Manual colour and fill scales for brain plots

Apply a custom named colour palette to brain atlas plots. Use this when you want to override the atlas default colours with your own colour mapping.

Usage

scale_brain_manual(
  palette,
  na.value = "grey",
  ...,
  aesthetics = c("fill", "colour", "color")
)

scale_colour_brain_manual(...)

scale_color_brain_manual(...)

scale_fill_brain_manual(...)

Arguments

palette

Named character vector mapping region names to colours.

na.value

Colour for NA entries (default: "grey").

...

Additional arguments (unused).

aesthetics

Which aesthetic to scale: "fill", "colour", or "color".

Value

A ggplot2 scale object.

Examples

library(ggplot2)

regions <- ggseg.formats::atlas_regions(dk())[1:2]
pal <- setNames(c("red", "blue"), regions)
ggplot() +
  geom_brain(atlas = dk(), aes(fill = region), show.legend = FALSE) +
  scale_fill_brain_manual(palette = pal)