ColorMapping-class.RdClass for Color Mapping
The ColorMapping-class handles color mapping for discrete values and continuous values.
Discrete values are mapped by setting a vector of colors and continuous values are mapped by setting
a color mapping function.
The ColorMapping-class provides following methods:
ColorMapping: contructor methods.
map_to_colors,ColorMapping-method: mapping values to colors.
color_mapping_legend,ColorMapping-method: draw legend or get legend as an object.
# There is no example NULL#> NULL