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as.roman(x)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
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