colors-functions: Color palettes for imaging

In Cardinal: A mass spectrometry imaging toolbox for statistical analysis

Description

Create a vector of n continuous or discrete colors.

Usage

color.map(map = c("redblack", "greenblack", "blueblack",
    "viridis", "cividis", "magma", "inferno", "plasma",
    "rainbow", "darkrainbow", "grayscale",
    "jet", "hot", "cool"), n = 100)

col.map(...)

intensity.colors(n = 100, alpha = 1)

jet.colors(n = 100, alpha = 1)

divergent.colors(n = 100, start = "#00AAEE",
    middle = "#FFFFFF", end = "#EE2200", alpha = 1)

risk.colors(n = 100, alpha = 1)

gradient.colors(n = 100, start = "#000000",
    end = "#00AAFF", alpha = 1)

bw.colors(n = 100, alpha = 1)

discrete.colors(n = 2, chroma = 150, luminance = 65, alpha = 1)

alpha.colors(col, n = 100,
    alpha = (seq_len(n)/n)^alpha.power,
    alpha.power = 2)

darkmode(default = TRUE)

lightmode(default = TRUE)

Arguments

map	the name of the colormap
n	the number of colors
...	arguments passed to color.map()
alpha	a vector of alpha values between 0 and 1
start	the start color value
middle	the middle color value
end	the end color value
chroma	the chroma of the color
luminance	the luminance of the color
col	the color(s) to expand with transparency
alpha.power	how the alpha should ramp as it increases
default	Should this be set as the default plotting mode?

Details

Most of these functions return a vector of colors.

Several of the options made available by color.map are borrowed from the viridisLite package, including 'viridis', 'cividis', 'magma', 'inferno', and 'plasma'. The original functions for these color palettes are also re-exported for use by users. See the documention for them in that package.

The darkmode and lightmode functions change the graphical parameters for the current graphics device accordingly. The new themes will be used for any subsequent plots.

Value

A palette of colors.

Author(s)

Kylie A. Bemis

See Also

viridis, cividis, magma, inferno, plasma

Examples

col <- gradient.colors(100^2)
if ( interactive() )
	image(matrix(1:(100^2), nrow=100), col=col)

Cardinal documentation built on Nov. 8, 2020, 11:10 p.m.