colour-mixing-arithmetic: Mix colour vectors with arithmetic operators
Description
These binary operators mix colour vectors with arithmetic operators.
Usage
# S3 method for palettes_colour
+(e1, e2)
Value
The binary operators return colour vectors of class
palettes_colour containing the result of the element by
element operations. If involving a zero-length vector the result has length
zero. Otherwise, the elements of shorter vectors are recycled as necessary.
The + operator is for additive colour mixing.