Thanks Erik, Schalk, Patrick, and David for you helpful advice. I hope I'll, at some point, I'll become versed enough in R to return the favor.
-- Best regards, David Young Marketing and Statistical Consultant Madrid, Spain +34 913 540 381 http://www.linkedin.com/in/europedavidyoung Monday, September 21, 2009, 5:42:35 PM, you wrote: EI> Hello, >> >> testfunc<-function(x) >> { y<-10 >> print(y) >> print(x) >> } >> >> testfunc(4) >> >> The variables x and y are accessible during execution of the function >> "testfunc" but not afterwards. EI> In R, expressions return values. When you define a function, ?function says that, "If the end of a function is reached without calling 'return', the value of the last evaluated expression is EI> returned." EI> So you are correct, 'x' and 'y' are local variables, and by all accounts they should be. If you want their values accessible, simply return them. EI> ## return just y EI> testfunc2 <- function(x) { EI> y <- 10 EI> y EI> } EI> ## return both x and y EI> testfunc2 <- function(x) { EI> y <- 10 EI> list(x, y) EI> } EI> There are ways to make x and y global from within a function, but in general that is not the R way to do things! EI> Hope that helps, EI> Erik Iverson ______________________________________________ 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.
