grDevices (version 3.2.0)

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

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, is specified.

Value

A vector of n gray colors.

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.

See Also

gray, rainbow, palette.

Examples

require(graphics)

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