gray.colors
Gray Color Palette
Create a vector of n gamma-corrected gray colors.
- Keywords
- color
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
0and1where 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.
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.
See Also
Examples
library(grDevices)
# NOT RUN {
require(graphics)
pie(rep(1, 12), col = gray.colors(12))
barplot(1:12, col = gray.colors(12))
# }
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