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