rainbow
Rainbow Colors

### Description

Generates a gradient of rainbow colors.

### Usage

    rainbow(n, s = 1, v = 1, start = 0, end = max(1, n - 1)/n, alpha = 1)

### Arguments

n | the number of colors desired.
s | a number or vector of n numbers between 0 and 1 giving the 'saturation' of the colors. Small numbers give washed-out colors.
v | a number or vector of n numbers between 0 and 1 giving the 'value' of the colors. Small numbers give muddy colors.
start | a number between 0 and 1 giving the hue of the first color. 0 and 1 are both red; the order is red, orange, yellow, green, blue, indigo, violet, and then back to red.
end | a number between 0 and 1 giving the hue of the last color.
alpha | a number or vector of n numbers between 0 and 1 giving the opacity of the colors.

Value
returns the vector of n color strings, equispaced in the hue-saturation-value color parameterization.
The color strings have the format "#RRGGBB" or "#RRGGBBAA" where XX are two digit hexadecimal values (range 00-FF) for the red, green, blue, and possible alpha (opacity) components of the colors.
See Also
hsv, heat.colors.
Examples

    rainbow(10)
    col2rgb(rainbow(10, s=0.5))

Package grDevices version 6.1.5-18
Package Index