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, rev = FALSE)
grey.colors(n, start = 0.3, end = 0.9, gamma = 2.2, alpha, rev = FALSE)
Arguments
n |
the number of gray colors (≥ 1) to be in the palette. |
start |
starting gray level in the palette (should be between |
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.
See Also
Examples
require(graphics)
pie(rep(1, 12), col = gray.colors(12))
barplot(1:12, col = gray.colors(12))
Copyright (©) 1999–2012 R Foundation for Statistical Computing.
Licensed under the GNU General Public License.