gray {grDevices} | R Documentation

## 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.

### 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`.

### See Also

`rainbow`, `hsv`, `hcl`, `rgb`.

### Examples

    gray(0:8 / 8)

[Package grDevices version 3.3.2 Index]