scale_colour_discrete_diverging: HCL-Based Discrete Diverging Color Scales for ggplot2

In colorspace: A Toolbox for Manipulating and Assessing Colors and Palettes

HCL-Based Discrete Diverging Color Scales for ggplot2

Description

Discrete ggplot2 color scales using the color palettes generated by diverging_hcl.

Usage

scale_colour_discrete_diverging(
  palette = NULL,
  c1 = NULL,
  cmax = NULL,
  l1 = NULL,
  l2 = NULL,
  h1 = NULL,
  h2 = NULL,
  p1 = NULL,
  p2 = NULL,
  alpha = 1,
  rev = FALSE,
  nmax = NULL,
  order = NULL,
  aesthetics = "colour",
  ...
)

scale_color_discrete_diverging(
  palette = NULL,
  c1 = NULL,
  cmax = NULL,
  l1 = NULL,
  l2 = NULL,
  h1 = NULL,
  h2 = NULL,
  p1 = NULL,
  p2 = NULL,
  alpha = 1,
  rev = FALSE,
  nmax = NULL,
  order = NULL,
  aesthetics = "colour",
  ...
)

scale_fill_discrete_diverging(..., aesthetics = "fill")

Arguments

palette	The name of the palette to be used. Run hcl_palettes(type = "diverging") for available options.
c1	Chroma value at the scale endpoints.
cmax	Maximum chroma value.
l1	Luminance value at the scale endpoints.
l2	Luminance value at the scale midpoint.
h1	Hue value at the first endpoint.
h2	Hue value at the second endpoint.
p1	Control parameter determining how chroma should vary (1 = linear, 2 = quadratic, etc.).
p2	Control parameter determining how luminance should vary (1 = linear, 2 = quadratic, etc.).
alpha	Numeric vector of values in the range [0, 1] for alpha transparency channel (0 means transparent and 1 means opaque).
rev	If TRUE, reverses the order of the colors in the color scale.
nmax	Maximum number of different colors the palette should contain. If not provided, is calculated automatically from the data.
order	Numeric vector listing the order in which the colors should be used. Default is 1:nmax.
aesthetics	The ggplot2 aesthetics to which this scale should be applied.
...	common discrete scale parameters: name, breaks, labels, na.value, limits and guide. See discrete_scale for more details.

Details

If both a valid palette name and palette parameters are provided then the provided palette parameters overwrite the parameters in the named palette. This enables easy customization of named palettes.

Examples

library("ggplot2")

# default colors with slightly darkened midpoint
ggplot(iris, aes(Sepal.Length, Sepal.Width, color = Species)) +
  geom_point() + theme_minimal() + 
  scale_color_discrete_diverging(l2=75)

# color scale "Green-Orange"
ggplot(iris, aes(Sepal.Length, fill = Species)) +
  geom_density(alpha = 0.7) + theme_classic() +
    scale_fill_discrete_diverging(palette = "Green-Orange", rev = TRUE)
    
# use `nmax` and `order` to skip some colors
ggplot(iris, aes(Sepal.Length, fill = Species)) +
  geom_density(alpha = 0.7) + theme_classic() +
    scale_fill_discrete_diverging(palette = "Green-Orange", nmax = 5, order = c(1, 4, 5))

colorspace documentation built on Sept. 11, 2024, 7:05 p.m.