a numeric vector, or a character vector of arabic or roman
numerals.
Details
as.roman creates objects of class "roman" which are
internally represented as integers, and have suitable methods for
printing, formatting, subsetting, and coercion to character.
Only numbers between 1 and 3899 have a unique representation as roman
numbers.
## First five roman 'numbers'.(y <- as.roman(1 : 5))
## Middle one.y[3]
## Current year as a roman number.(y <- as.roman(format(Sys.Date(), "%Y")))
## 10 years ago ...y - 10