"Roman numerals" is actually a tricky subject, since there were
different versions at different times.
It is worth noting that the Unicode character set (and R does support
Unicode, does it not?) includes
the Roman numeral characters for 5,000 10,000 50,000 and 100,000 so
the idea that 3999 is an a
On Wed, 15 Jan 2025 11:41:34 +0100
Martin Maechler wrote:
> > Jani V?limaa
> > on Tue, 14 Jan 2025 20:39:19 +0200 writes:
>
> > Hello,
> > I don't know what's changed or how to figure out why as.roman() started
> > to work different way lately on Mageia Cauldron. Cauldr
> Martin Maechler
> on Thu, 16 Jan 2025 12:04:44 +0100 writes:
[..]
> But there's more: our current help page
> https://search.r-project.org/R/refmans/utils/html/roman.html
> says
>> Only numbers between 1 and 3999 have a unique representation
>> as
> Stephanie Evert
> on Wed, 15 Jan 2025 13:18:03 +0100 writes:
> Well, the real issue then seems to be that .roman2numeric uses an invalid
regular expression:
>>> grepl("^M{,3}D?C{,4}L?X{,4}V?I{,4}$", cc)
>> [1] TRUE TRUE TRUE TRUE TRUE
> or
>>> grepl("^I{,2}$"
Well, the real issue then seems to be that .roman2numeric uses an invalid
regular expression:
>> grepl("^M{,3}D?C{,4}L?X{,4}V?I{,4}$", cc)
> [1] TRUE TRUE TRUE TRUE TRUE
or
>> grepl("^I{,2}$", c("II", "III", ""))
> [1] TRUE TRUE FALSE
Both the TRE and the PCRE specification only allow
> Jani Välimaa
> on Tue, 14 Jan 2025 20:39:19 +0200 writes:
> Hello,
> I don't know what's changed or how to figure out why as.roman() started
> to work different way lately on Mageia Cauldron. Cauldron is the
> latest development version of Mageia Linux.
> Expect
Hello,
I don't know what's changed or how to figure out why as.roman() started
to work different way lately on Mageia Cauldron. Cauldron is the
latest development version of Mageia Linux.
Expected bahavior:
> as.roman(strrep("I", 1:5))
[1] I II III IV V
Current behavior:
> as.roman(strrep(
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