grDevices (version 3.6.2)

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

rev

logical indicating whether the ordering of the colors should be reversed.

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

# NOT RUN {
require(graphics)

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