gray: Gray Level Specification
Description
Create a vector of colors from a vector of gray levels.
Usage
gray(level, alpha = NULL)
grey(level, alpha = NULL)
Arguments
level
a vector of desired gray levels between 0 and
1; zero indicates "black" and one indicates
"white".
alpha
the opacity, if specified.
Value
A vector of colors of the same length as level.
Details
The values returned by gray can be used with a col=
specification in graphics functions or in par.
grey is an alias for gray.