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problem with lapply(x, subset, ...) and variable select argument

Gabor Grothendieck 
The problem is that subset looks into its parent frame but in this
case the parent frame is not the environment in tt but the environment
in lapply since tt does not call subset directly but rather lapply does.

Try this which is similar except we have added the line beginning
with environment before the print statement.

tt <- function (n) {
   x <- list(data.frame(a=1,b=2), data.frame(a=3,b=4))
   environment(lapply) <- environment()
   print(lapply(x, subset, select = n))
}

n <- "b"
tt("a")

What this does is create a new version of lapply whose
parent is the environment in tt.
On 10/10/05, joerg van den hoff <j.van_den_hoff at fz-rossendorf.de> wrote:

Thread (8 messages)

Joerg van den Hoff problem with lapply(x, subset, ...) and variable select argument Oct 10 Thomas Lumley problem with lapply(x, subset, ...) and variable select argument Oct 10 Gabor Grothendieck problem with lapply(x, subset, ...) and variable select argument Oct 10 Joerg van den Hoff problem with lapply(x, subset, ...) and variable select argument Oct 11 Dimitris Rizopoulos problem with lapply(x, subset, ...) and variable select argument Oct 11 Peter Dalgaard problem with lapply(x, subset, ...) and variable select argument Oct 11 Thomas Lumley problem with lapply(x, subset, ...) and variable select argument Oct 11 Gabor Grothendieck problem with lapply(x, subset, ...) and variable select argument Oct 11