> -----Original Message----- > From: r-help-boun...@r-project.org [mailto:r-help-bounces@r- > project.org] On Behalf Of Ellerbe, Caitlyn Nicole > Sent: Wednesday, May 08, 2013 11:51 AM > To: Ellerbe, Caitlyn Nicole; r-help@R-project.org > Subject: Re: [R] Correctly Setting New Seed > > By crash, I mean that it shuts the program and no error message is > provided. However, my question is more general - how to get the two > versions of code below to return the same string of random numbers. The > code provided will run without incident and is only provided to make > the problem clear. The true code that causes the crash isn't necessary, > only that I need to be able to split it into smaller chunks while > maintaining the integrity of the random sequence even if the program > closes and all information is lost. > > -----Original Message----- > From: r-help-boun...@r-project.org [mailto:r-help-bounces@r- > project.org] On Behalf Of Ellerbe, Caitlyn Nicole > Sent: Wednesday, May 08, 2013 2:06 PM > To: r-help@R-project.org > Subject: [R] Correctly Setting New Seed > > Could someone please suggest a method to store the current random seed. > I'm having trouble understanding how to correctly use set.seed and > .Random.seed. > > Specifically, I have the following code that crashes: > > > > set.seed(seed) > > for(i in 1:10){ > > print( runif(1)) > > } > > > > To get around this I need to split the number of iterations into > chunks: > > > > set.seed(seed) > > for(i in 1:5){ > > print(runif(1)) > > new.seed<-.Random.seed > > } > > > > set.seed(new.seed) > > for(i in 6:10){ > > print(runif(1)) > > } > > > > When I compare the sequence of numbers from the single run to the > sequence from the chunked code they don't match. Is the .Random.seed > argument in the wrong position or is there another way to accomplish > this? >
To answer your specific question, you need to change the line set.seed(new.seed) To .Random.seed <- new.seed Hope this is helpful, 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 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.
