[R] Problem with random numbers/seed

[Steven Yen]

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
>
>

-- 
styen using ntu.edu.tw (S.T. Yen)


	[[alternative HTML version deleted]]