R scale_colour_distiller() Function

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The scale_colour_distiller() function is used to apply a color scale to the color aesthetic of a plot. It uses a color scale generated using a distiller color scheme, a type of color scheme that emphasizes perceptual uniformity and is commonly used for data visualization.

Syntax

scale_colour_distiller(
  type = "seq",
  palette = 1,
  direction = -1,
  values = NULL,
  space = "Lab",
  na.value = "grey50",
  guide = "colourbar",
  aesthetics = "colour"
)

Parameters

  1. type: It is one of “seq” (sequential), “div” (diverging), or “qual” (qualitative)
  2. palette: If a string will use that named palette. The list of available palettes can be found in the Palettes section.
  3. direction: It sets the order of colors in the scale. If 1, the default colors are as output by RColorBrewer::brewer.pal(). If -1, the order of colors is reversed.
  4. aesthetics: The character string or vector of character strings listing the name(s) of the aesthetic(s) that this scale works with.
  5. guide: Type of legend. Use “colourbar” for continuous color bar or “legend” for discrete color legend.
  6. na.value: It is a color for missing values.
  7. values: If colors are not evenly positioned along the gradient, this vector gives the position (between 0 and 1) for each color in the colors vector.
  8. space: It is a color space in which to calculate the gradient. Must be “Lab” – other values are deprecated.

Example

library(ggplot2)

# Create a scatterplot of car data
ggplot(mtcars, aes(x = hp, y = mpg, color = cyl)) +
 geom_point(size = 3) +
 labs(
    title = "Fuel Efficiency",
    x = "Horse power", y = "Miles per gallon",
    color = "Vehicle Class"
 ) +
 scale_colour_distiller(
   palette = "Spectral", direction = 1,
   name = "Number of cylinders"
 )

Output

scale_colour_distiller() Function in R

That’s it.

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