On 09/05/2019 12:43 p.m., Ulrike Grömping wrote:
Hmmmh, but does that also apply if the sample.kind has been set to the
old version? I.e., would
if (getRversion()>="3.6.0") RNGkind(sample.kind="Rounding")
val <- 10
set.seed(val)
discard <- sample(1000, 100)
rnorm(36)
produce the same normal random numbers in 3.5.3 and 3.6.0? I would have
expected it to, but it seems to produce the same normal random numbers
as R version 3.6.0 in the previous version of the test code without the
RNGkind call.
I'm not seeing that, but I'm not using the exact versions you tested.
If I run your code in "R version 3.5.2 (2018-12-20)" and "R Under
development (unstable) (2019-05-02 r76454)" I get this output from both:
> if (getRversion()>="3.6.0") RNGkind(sample.kind="Rounding")
> val <- 10
> set.seed(val)
> discard <- sample(1000, 100)
> rnorm(36)
[1] -0.4006375 -0.3345566 1.3679540 2.1377671 0.5058193 0.7863424
-0.9022119 0.5328970 -0.6458943 0.2909875 -1.2375945
[12] -0.4561763 -0.8303227 0.3401156 1.0663764 1.2161258 0.7356907
-0.4812086 0.5627448 -1.2463197 0.3809222 -1.4304273
[23] -1.0484455 -0.2185036 -1.4899362 1.1727063 -1.4798270 -0.4303878
-1.0516386 1.5225863 0.5928281 -0.2226615 0.7128943
[34] 0.7166008 0.4402419 0.1588306
Okay, I just installed 3.6.0, and I get the same values there. I don't
see a Mac binary for 3.5.3, so I can't test that one.
Duncan Murdoch
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