R: Gray Color Palette

gray.colors {grDevices}

R Documentation

Gray Color Palette

Description

Create a vector of n gamma-corrected gray colors.

Usage

gray.colors(n, start = 0.3, end = 0.9, gamma = 2.2, alpha, rev = FALSE)
grey.colors(n, start = 0.3, end = 0.9, gamma = 2.2, alpha, rev = FALSE)

Arguments

`n`	the number of gray colors (`\ge 1`) to be in the palette.
`start`	starting gray level in the palette (should be between `0` and `1` where zero indicates `"black"` and one indicates `"white"`).
`end`	ending gray level in the palette.
`gamma`	the gamma correction.
`alpha`	the opacity, if specified.
`rev`	logical indicating whether the ordering of the colors should be reversed.

Details

The function gray.colors chooses a series of n gamma-corrected gray levels between start and end: seq(start^gamma, end^gamma, length = n)^(1/gamma). The returned palette contains the corresponding gray colors. This palette is used in barplot.default.

grey.colors is an alias for gray.colors.

Value

A vector of n gray colors.

Examples

require(graphics)

pie(rep(1, 12), col = gray.colors(12))
barplot(1:12, col = gray.colors(12))

[Package grDevices version 4.4.1 Index]