Hi, I have read the previous thread on using references to objects in a function but the solution suggested does'nt seem to be working.
basically I have an object x which has an attribute a containing some text. I would like to pass x to a function which will change the attribute a with some new text and have the change visible when the function exits. something like attr(x,'a') <- 'some text' f <- function(z) { attr(z,'a') <- 'some new text' } So that when I call f(x) attr(x,'a') gives 'some new text' I went by the example below g <- function(z) eval(eval(substitute(expression(z[1] <<- z[1]+1)))) a <- 1:5 g(a) # increments first element of a by 1 a # c(2,2,3,4,5) replcing the innermost bracket with attr(z,'a') <- 'some new text' but the the after returning from the function the attribute of x does not get changed. Could anybody point out how I could achieve this? Do I need to use the R.oo package or can this be done without external packages? Thanks, ------------------------------------------------------------------- Rajarshi Guha <[EMAIL PROTECTED]> <http://jijo.cjb.net> GPG Fingerprint: 0CCA 8EE2 2EEB 25E2 AB04 06F7 1BB9 E634 9B87 56EE ------------------------------------------------------------------- How I wish I were what I was when I wished I were what I am. ______________________________________________ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html