palettes (version 0.2.2)

scale_colour_palette_d: Colour scales from colour vectors and colour palettes

Description

Create discrete, continuous, and binned colour scales from colour vectors and colour palettes.

Usage

scale_colour_palette_d(palette, direction = 1, ...)
scale_fill_palette_d(palette, direction = 1, ...)
scale_colour_palette_c(palette, direction = 1, ..., na.value = NA)
scale_fill_palette_c(palette, direction = 1, ..., na.value = NA)
scale_colour_palette_b(palette, direction = 1, ...)
scale_fill_palette_b(palette, direction = 1, ...)

Value

A scale function that controls the mapping between data and colour or fill aesthetics in a ggplot2 plot.

Arguments

palette

An object of class palettes_palette or palettes_colour.

direction

Sets the order of colours in the scale. If 1, the default, colours are ordered from first to last. If -1, the order of colours is reversed.

...

Other arguments passed on to ggplot2::discrete_scale(), ggplot2::continuous_scale(), or ggplot2::binned_scale() to control name, limits, breaks, labels and so forth.

na.value

Missing values will be replaced with this value.

Examples

library(ggplot2)

# Use palette_d with discrete data
discrete_pal <- pal_colour(c("#663171", "#EA7428", "#0C7156"))
ggplot(mtcars, aes(wt, mpg, colour = as.factor(cyl))) +
  geom_point(size = 3) +
  scale_colour_palette_d(discrete_pal)

# Use palette_c with continuous data
continuous_pal <- pal_colour(c("#3C0D03", "#E67424", "#F5C34D"))
ggplot(mtcars, aes(wt, mpg, colour = mpg)) +
  geom_point(size = 3) +
  scale_colour_palette_c(continuous_pal)

# Use palette_b to bin continuous data before mapping
ggplot(mtcars, aes(wt, mpg, colour = mpg)) +
  geom_point(size = 3) +
  scale_colour_palette_b(continuous_pal)