This function creates colors of class “LUV”;
a subclass of the virtual “color” 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
take values between -100 and 100. The a and b 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)
providing 
.