gray {grDevices} R Documentation

## Gray Level Specification

### Description

Create a vector of colors from a vector of gray levels.

### Usage

gray(level, alpha)
grey(level, alpha)


### Arguments

 level a vector of desired gray levels between 0 and 1; zero indicates "black" and one indicates "white". alpha the opacity, if specified.

### 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.

### Value

A vector of colors of the same length as level.

rainbow, hsv, hcl, rgb.
gray(0:8 / 8)