Thanks for the heads up. The new result for round(51/80, digits=3) is
also consistent with sprintf("%.3f", 51/80), format(51/80, digits=3),
print(51/80, digits=3), and with the sprintf() function in C. Which is
somehow satisfying.
H.
On 3/5/20 05:54, Therneau, Terry M., Ph.D. via R-devel
wrote:> This is a small heads up for package maintainers.?? Under the more recent
R-devel, R CMD
> check turned up some changes in the *.out files.?? The simple demonstration
is to type
> "round(51/80, 3)", which gives .638 under the old and .637 under
the new.?? (One of my
> coxph test cases has a concordance of exactly 51/80).
>
> In this particular case 51/80 is exactly .63750000, but that value does not
have an exact
> representation in base 2.? The line below would argue that the new version
is correct, at
> least with respect to the internal representation.
>
> > print(51/80, digits = 20)
> [1] 0.63749999999999995559
>
> This is not a bug or problem, it just means that whichever version I put
into my
> survival/tests/book6.Rout.save file, one of R-devel or R-current will flag
an issue.
>
>
>
> [[alternative HTML version deleted]]
>
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