scale_tol_diverging: Paul Tol's Diverging Color Schemes for 'ggplot2' and 'ggraph'

In tesselle/khroma: Colour Schemes for Scientific Data Visualization

Paul Tol's Diverging Color Schemes for ggplot2 and ggraph

Description

Provides diverging color scales from Paul Tol's Colour Schemes.

Arguments

...	Arguments passed to ggplot2::continuous_scale().
reverse	A logical scalar. Should the resulting vector of colors be reversed?
range	A length-two numeric vector specifying the fraction of the scheme's color domain to keep.
midpoint	A length-one numeric vector giving the midpoint (in data value) of the diverging scale. Defaults to 0.
discrete	A logical scalar: should the color scheme be used as a discrete scale? If TRUE, it is a departure from Paul Tol's recommendations and likely a very poor use of color.
aesthetics	A character string or vector of character strings listing the name(s) of the aesthetic(s) that this scale works with.

Details

Palette	Max. colors	NA value
sunset	11	#FFFFFF
BuRd	9	#FFEE99
PRGn	9	#FFEE99

Value

A continuous scale.

Interpolation

If more colors than defined are needed from a given scheme, the color coordinates are linearly interpolated to provide a continuous version of the scheme.

Note that the default color for NA can be overridden by passing a value to ggplot2::continuous_scale().

Author(s)

N. Frerebeau

References

Tol, P. (2018). Colour Schemes. SRON. Technical Note No. SRON/EPS/TN/09-002, issue 3.1. URL: https://personal.sron.nl/~pault/data/colourschemes.pdf

See Also

Other color-blind safe color schemes: scale_crameri_cyclic, scale_crameri_diverging, scale_crameri_mutlisequential, scale_crameri_sequential, scale_okabeito_discrete, scale_tol_discrete, scale_tol_sequential

Examples

data(economics, package = "ggplot2")

ggplot2::ggplot(economics, ggplot2::aes(psavert, pce, colour = unemploy)) +
  ggplot2::geom_point() +
  scale_color_sunset(reverse = TRUE, midpoint = 12000)

ggplot2::ggplot(economics, ggplot2::aes(psavert, pce, colour = unemploy)) +
  ggplot2::geom_point() +
  scale_color_BuRd(midpoint = 9000)

ggplot2::ggplot(economics, ggplot2::aes(psavert, pce, colour = unemploy)) +
  ggplot2::geom_point() +
  scale_color_PRGn(midpoint = 9000, range = c(0.25, 1))

tesselle/khroma documentation built on Jan. 15, 2024, 9:15 p.m.