Thank You very much for Your replies. Dear Michael, "Does this persist after a new session (perhaps running as R --vanilla) and/or reinstall?" Yes, it does. After running R --vanilla, still there are 4 contexts more on the call stack. "You didn't show us how you tried to use parent.frame()" I did it like this: testfun1 <- function (x1) { a1 <- 1; sapply(X="a1", FUN=get, envir=parent.frame(x1)); }
testfun1(x1=1); The above code never succeeds no matter what a number I give to x1. " 3. Why does the number of contexts in the call stack differ in R and in rkward? It shouldn't. This is an issue that needs further sorting out." Here is some more info on my setup: sessionInfo() R version 2.15.1 (2012-06-22) Platform: x86_64-slackware-linux-gnu (64-bit) locale: [1] LC_CTYPE=en_US LC_NUMERIC=C LC_TIME=en_US [4] LC_COLLATE=C LC_MONETARY=en_US LC_MESSAGES=en_US [7] LC_PAPER=C LC_NAME=C LC_ADDRESS=C [10] LC_TELEPHONE=C LC_MEASUREMENT=en_US LC_IDENTIFICATION=C attached base packages: [1] stats graphics grDevices utils datasets methods base loaded via a namespace (and not attached): [1] tools_2.15.1 Best regards, Martin ______________________________________________ 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.