R: Create LUV Colors

LUV {colorspace} | R Documentation

## Create LUV Colors

### Description

This function creates colors of class “LUV”; a subclass of the virtual `color-class` class.

### Usage

    LUV(L, U, V, names)

### Arguments

`L, U, V` | these arguments give the L, U and V coordinates of the colors. The values can be provided in separate `L`, `U` and `V` vectors or in a three-column matrix passed as `L`.
`names` | a vector of names for the colors (by default the row names of `L` are used).

### Details

The `L`, `U` and `V` values give the coordinates of the colors in the CIE (1976) L*u*v* space. This is a transformation of the 1931 CIE XYZ space which attempts to produce perceptually based axes. Luminance takes values between 0 and 100, and the other coordinates typically take values between -100 and 100, although these values can also be exceeded by highly saturated colors. The u and v coordinates measure positions on green/red and blue/yellow axes.

### Value

An object of class `LUV` which inherits from class `color`.

### Author(s)

Ross Ihaka

### See Also

`RGB`, `HSV`, `XYZ`, `LAB`, `polarLAB`, `polarLUV`.

### Examples

    ## Show the LUV space
    set.seed(1)
    x <- RGB(runif(1000), runif(1000), runif(1000))
    y <- as(x, "LUV")
    head(x)
    head(y)
    plot(y)

[Package colorspace version 2.0-1 Index]