I have known from the old days to set a random seed of a LARGE ODD NUMBER. Now I read instructions of set.seed and it requires ANY INTEGER. Any idea? Or, does it matter. Thanks.
styen at ntu.edu.tw (S.T. Yen) [[alternative HTML version deleted]]
Random seed
3 messages · Steven Yen, Jeff Newmiller
It doesn't matter. The whole point is to make the pseudo-random sequence repeatable... unless you have a specific reason to avoid repeatability.
On December 22, 2018 5:33:39 PM PST, Steven Yen <styen at ntu.edu.tw> wrote:
I have known from the old days to set a random seed of a LARGE ODD NUMBER. Now I read instructions of set.seed and it requires ANY INTEGER. Any idea? Or, does it matter. Thanks.
Sent from my phone. Please excuse my brevity.
For the record, low bitcount RNGs are relatively sensitive to initialization [1] such that rules like the one you reference might make sense for specific designs, but the default RNG used in R is much much more sophisticated than that [2]. [1] http://daviddeley.com/random/random4.htm [2] ?Random (https://stat.ethz.ch/R-manual/R-devel/library/base/html/Random.html)
On December 22, 2018 8:09:42 PM PST, Jeff Newmiller <jdnewmil at dcn.davis.ca.us> wrote:
It doesn't matter. The whole point is to make the pseudo-random sequence repeatable... unless you have a specific reason to avoid repeatability. On December 22, 2018 5:33:39 PM PST, Steven Yen <styen at ntu.edu.tw> wrote:
I have known from the old days to set a random seed of a LARGE ODD NUMBER. Now I read instructions of set.seed and it requires ANY INTEGER. Any idea? Or, does it matter. Thanks.
Sent from my phone. Please excuse my brevity.