vec_arith for iso_double_with_units
# S3 method for iso_double_with_units
vec_arith(op, x, y, ...)An arithmetic operator as a string
A pair of vectors. For !, unary + and unary -, y will be
a sentinel object of class MISSING, as created by MISSING().
A pair of vectors. For !, unary + and unary -, y will be
a sentinel object of class MISSING, as created by MISSING().
These dots are for future extensions and must be empty.