Description Usage Arguments Details Value References See Also Examples

Transform a vector of given colors to the corresponding colors with chroma reduced (by a tunable amount) in HCL space.

1 | ```
desaturate(col, amount = 1, ...)
``` |

`col` |
vector of R colors. Can be any of the three kinds of R colors, i.e.,
either a color name (an element of |

`amount` |
numeric specifying the amount of desaturation where |

`...` |
additional arguments. If |

If input `col`

is a vector given colors are first transformed to RGB
(either using `hex2RGB`

or
`col2rgb`

) and then to HCL
(`polarLUV`

). In HCL, chroma is reduced
and then the color is transformed back to a hexadecimal
string.

If input `col`

is a matrix with three rows named `R`

, `G`

, and
`B`

(top down) they are interpreted as Red-Green-Blue values within the
range `[0-255]`

. The desaturation takes place in the HCL space as well.
Instead of an (s)RGB color vector a matrix of the same size as the input
`col`

with desaturated Red-Green-Blue values will be returned.
This can be handy to avoid too many conversions.

A character vector with (s)RGB codings of the colors in the palette
if input `col`

is a vector. If input `col`

is a matrix with R/G/B
values a matrix of the same form and size will be returned.

Zeileis A, Fisher JC, Hornik K, Ihaka R, McWhite CD, Murrell P, Stauffer R, Wilke CO (2019). “ccolorspace: A Toolbox for Manipulating and Assessing Colors and Palettes.” arXiv:1903.06490, arXiv.org E-Print Archive. http://arxiv.org/abs/1903.06490

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 | ```
## rainbow of colors and their desaturated counterparts
rainbow_hcl(12)
desaturate(rainbow_hcl(12))
## convenience demo function
wheel <- function(col, radius = 1, ...)
pie(rep(1, length(col)), col = col, radius = radius, ...)
## compare base and colorspace palettes
## (in color and desaturated)
par(mar = rep(0, 4), mfrow = c(2, 2))
## rainbow color wheel
wheel(rainbow_hcl(12))
wheel(rainbow(12))
wheel(desaturate(rainbow_hcl(12)))
wheel(desaturate(rainbow(12)))
## apply desaturation directly on RGB values
RGB <- t(hex2RGB(rainbow(3))@coords * 255)
desaturate(RGB)
``` |

colorspace documentation built on May 2, 2019, 12:49 p.m.

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