Yes, I agree with you. I guess what I was really looking for is a function like UNset.seed()?
By having set.seed(), I can have reproducible code. But what if I want to check my work against what's produced from set.seed(100)? I really want to escape from the shadow of set.seed(), can I unset it? On Mon, Mar 18, 2013 at 3:07 PM, Nordlund, Dan (DSHS/RDA) < nord...@dshs.wa.gov> wrote: > As I understand it, how R normally does it is to use the system clock > to set the seed once per session, unless you use set.seed() to set a new > seed. You chose to set the seed to a different value. But from that point > on, the pseudo random number generation continues in the same way it > normally does. In your code below, each of your 100 histograms will be > different. If you then execute the for loop again (but not the > set.seed(100) statement), you will get a different set of histograms. The > only way you would be confined to set.seed(100) is if you keep resetting > the seed to 100. > > Dan > > Daniel J. Nordlund > Washington State Department of Social and Health Services > Planning, Performance, and Accountability > Research and Data Analysis Division > Olympia, WA 98504-5204 > > From: C W [mailto:tmrs...@gmail.com] > Sent: Monday, March 18, 2013 11:50 AM > To: Nordlund, Dan (DSHS/RDA) > Cc: r-help > Subject: Re: [R] How to stop set.seed() besides exiting out of R? > > set.seed(100) > for (i in 1:100){ > a <- rnorm(1000, mean=0, sd=1) > hist(a) > } > > #Now say, I want to simulate without being confined to set.seed(100), I > just want to get a simulation like how R "normally" does it. > > Mike > > On Mon, Mar 18, 2013 at 2:40 PM, Nordlund, Dan (DSHS/RDA) < > nord...@dshs.wa.gov<mailto:nord...@dshs.wa.gov>> wrote: > > -----Original Message----- > > From: r-help-boun...@r-project.org<mailto:r-help-boun...@r-project.org> > [mailto:r-help-bounces@r-<mailto:r-help-bounces@r-> > > project.org<http://project.org>] On Behalf Of C W > > Sent: Monday, March 18, 2013 11:27 AM > > To: r-help > > Subject: [R] How to stop set.seed() besides exiting out of R? > > > > Hi list, > > > > I am curious how to stop the set.seed(), I don't want the same repeated > > random number. I know I can set it to a different seed, but I don't > > want > > to go through the trouble of setting different seed every time. > > > > Thanks, > > Mike > > > Can you show us how you are using set.seed() that results in getting the > same sequence repeatedly? If you are doing simulations in a loop, then set > the seed once, outside the loop. Otherwise, I am not sure what you are > doing that causes problems. A reproducible example would really help. > > Dan > > Daniel J. Nordlund > Washington State Department of Social and Health Services > Planning, Performance, and Accountability > Research and Data Analysis Division > Olympia, WA 98504-5204 > > ______________________________________________ > R-help@r-project.org<mailto:R-help@r-project.org> mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide > http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. > > > [[alternative HTML version deleted]] > > > ______________________________________________ > R-help@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide > http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. > > [[alternative HTML version deleted]]
______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
