destiny (version 2.0.4)

cube_helix: Sequential color palette using the cube helix system

Description

Creates a perceptually monotonously decreasing (or increasing) lightness color palette with different tones.

Usage

cube_helix(n = 6, start = 0, r = 0.4, hue = 0.8, gamma = 1,
  light = 0.85, dark = 0.15, reverse = FALSE)
scale_colour_cube_helix(..., start = 0, r = 0.4, hue = 0.8, gamma = 1,
  light = 0.85, dark = 0.15, reverse = FALSE, discrete = TRUE,
  guide = if (discrete) "legend" else "colourbar")
scale_color_cube_helix(..., start = 0, r = 0.4, hue = 0.8, gamma = 1,
  light = 0.85, dark = 0.15, reverse = FALSE, discrete = TRUE,
  guide = if (discrete) "legend" else "colourbar")
scale_fill_cube_helix(..., start = 0, r = 0.4, hue = 0.8, gamma = 1,
  light = 0.85, dark = 0.15, reverse = FALSE, discrete = TRUE,
  guide = if (discrete) "legend" else "colourbar")

Arguments

n

Number of colors to return (default: 6)

start

Hue to start helix at ($\text{start}\in [0,3]$, default: 0)

r

Number of rotations of the helix. Can be negative. (default: 0.4)

hue

Saturation. 0 means greyscale, 1 fully saturated colors (default: 0.8)

gamma

Emphasize darker (gamma < 1) or lighter (gamma > 1) colors (default: 1)

light

Lightest lightness (default: 0.85)

dark

Darkest lightness (default: 0.15)

reverse

logical. If TRUE, reverse lightness (default: FALSE)

...

parameters passed to discrete_scale or continuous_scale

discrete

If TRUE, return a discrete scale, if FALSE a continuous one (default: TRUE)

guide

Type of scale guide to use. See guides

Value

A character vector of hex colors with length n

Examples

palette(cube_helix())
image(matrix(1:6), col = 1:6, pch = 19, axes = FALSE)

cr <- scales::colour_ramp(cube_helix(12, r = 3))
r <- runif(100)
plot(1:100, r, col = cr(r), type = 'b', pch = 20)