[R] Problem with random numbers/seed

[Uwe Ligges]

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