This function creates colors of class XYZ;
a subclass of the virtual ``color'' class.
Usage
XYZ(X, Y, Z, names)
Arguments
X,Y,Z
these arguments give the X, Y and Z coordinates of
the colors. The values can be provided in separate X,
Y and Z vectors or in a three-column matrix
passed as X.
names
A vector of names for the colors (by default the row
names of X are used).
Value
An object of class ``XYZ'' which inherits from class ``color.''
Details
The X, Y and Z values are the levels of the CIE primaries.
These are scaled so that the luminance of the display white-point
is 100. The white-point is taken to be D65, which means
that its coordinates are 95.047, 100.000, 108.883.