On 21.06.2019 19:09, Steven Yen wrote:
Now I see that results were replicated but running RNGversion
I get a warning message. Isn't there a way to do this clean?
Well, the old RNG is known to be not optimal, hence we give a warning if
you choose the old one. This is the clean way if you really want to get
the old (slightly buggy) behaviour.
Best,
Uwe Ligges
RNGversion("3.5.3") Warning message: In RNGkind("Mersenne-Twister",
"Inversion", "Rounding") : non-uniform 'Rounding' sampler used
On 6/22/2019 1:03 AM, Uwe Ligges wrote:
What does not work?
For me it works under R-3.6.0:
x<-1:500
set.seed(12345671)
j<-sample(1:length(x),size=60); y<-x[j]
summary(j)
RNGversion("3.5.3")
set.seed(12345671)
j<-sample(1:length(x),size=60); y<-x[j]
summary(j)
Now I get the results you got udner the old R.
Best,
Uwe Ligges
On 21.06.2019 18:39, Steven Yen wrote:
Thanks. Somewhat of a mystery. The older version I had was
R-3.5.3patched.
I cannot get the RNGversion command to run. Can you help? Thanks.
On 6/22/2019 12:25 AM, Uwe Ligges wrote:
See the NEWS, the RNG has been changed, use RNGversion
On 21.06.2019 18:10, Steven Yen wrote:
Dear all,
I did all this work with older R (R-3.5.3.patched and older)
but now with R3.6 I cannot replicate the results.
Below I sample 60 observations from 1:500 using the sample command
with
a random seed of 123. I get different results. Advice appreciated.
Steven Yen
> # Run under R-3.6.0
> x<-1:500
> set.seed(12345671)
> j<-sample(1:length(x),size=60); y<-x[j]
> summary(y)
Min. 1st Qu. Median Mean 3rd Qu. Max.
26.0 134.2 240.0 249.8 368.0 500.0
> # Run under R-3.5.3.patched
> x<-1:500
> set.seed(12345671)
> j<-sample(1:length(x),size=60); y<-x[j]
> summary(y)
Min. 1st Qu. Median Mean 3rd Qu. Max.
9.0 122.2 205.0 236.1 364.2 493.0
Under R-3.6.0 use, e.g.
RNGversion("3.5.2")
to get reproducible results from the older RNG.
Best,
Uwe Ligges
--
st...@ntu.edu.tw (S.T. Yen)
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