Comments (2)
Wow. That is an excellent issue ticket. The only thought I had -- and it turns out it was the right one -- is that the original article on this sample()
approach via RcppArmadillo
is so old ... that it was affected by the one change made in R 3.6.0. See under 'Details' in help(set.seed)
:
‘sample.kind’ can be ‘"Rounding"’ or ‘"Rejection"’, or partial
matches to these. The former was the default in versions prior to
3.6.0: it made ‘sample’ noticeably non-uniform on large
populations, and should only be used for reproduction of old
results. See PR#17494 for a discussion.
When I use that with your code I get same sample as sample.c
gets:
> RNGkind(sample.kind="Rounding")
Warning message:
In RNGkind(sample.kind = "Rounding") : non-uniform 'Rounding' sampler used
> set.seed(7)
> (sample.r <- sample(letters, N, replace=T))
[1] "z" "k" "d" "b" "g" "u" "i" "z" "e" "l"
> print(identical(sample.r, sample.c))
[1] TRUE
>
I will add a note to the article.
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I just added short note to this piece. Thanks again for pointing this out.
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