colorspace (version 2.1-1)

polarLAB: Create polarLAB Colors

Description

This function creates colors of class ``polarLAB''; a subclass of the virtual color-class class.

Usage

polarLAB(L, C, H, names)

Value

An object of class polarLAB which inherits from class color.

Arguments

L, C, H

these arguments give the L, C and H coordinates of the colors. The values can be provided in separate L, C and H 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).

Author

Ross Ihaka

Details

The polarLAB space is a transformation of the CIE \(L^*a^*b^*\) space so that the \(a\) and \(b\) values are converted to polar coordinates. The radial component \(C\) measures chroma and the angular coordinate \(H\) is measures hue.

See Also

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

Examples

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