On Thu, 31 May 2007, Talbot Katz wrote: > Hi. > > Suppose I have a function which does some random number generation within. > The random number generation inside the function changes the value of > .Random.seed in the calling environment. If I want to restore the ^^^^^^^^^^^^^^^^^^^^^^^^^^ That is your misunderstanding. From the help page
The object '.Random.seed' is only looked for in the user's workspace. which seems plain enough. So, you can do save.seed <- get(".Random.seed", .GlobalEnv) assign(".Randon.seed", save.seed, .GlobalEnv) to save and restore, *provided* that random numbers have been used in the session (or .Random.seed will not exist). However, the help recommends using set.seed(), and why not follow the advice? > pre-function call .Random.seed, I can do: > > save.seed<-.Random.seed > result<-myfunction() > .Random.seed<-save.seed > > Is there a way to do the restoration inside the function? I tried putting > the "save.seed<-.Random.seed" and ".Random.seed<-save.seed" statements > inside the function, but that didn't work. As documented on the help page. [...] -- Brian D. Ripley, [EMAIL PROTECTED] Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/ University of Oxford, Tel: +44 1865 272861 (self) 1 South Parks Road, +44 1865 272866 (PA) Oxford OX1 3TG, UK Fax: +44 1865 272595 ______________________________________________ R-help@stat.math.ethz.ch 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.