Hi,
I'm struggling with a bit of scoping using the with() function. I think it's
best explained with an example:
x <- list(foobar=2)
f <- function(){foobar*2}
with(x,f())
This throws an error that 'foobar' does not exist. However if I define foobar
in the global environment, f will find it whether I call it from the global
environment or from within x. I have also tried using
get("foobar",parent.frame()) within f, along with other variations, with no
success.
I could always just add foobar as an argument to f, but in my actual work case
foobar is a potentially very large object that is not worth making a copy of.
(I don't know how much of an effect this will actually have on performance). I
also just don't like all the bookkeeping of having to know which objects in x I
am going to need in f and passing them all as arguments.
I would appreciate any insight about why the scoping is not working as I
thought it would, and if there is any way to get around it without directly
passing arguments to f.
Thank you,
Peter
_______________________________________________
R-SIG-Mac mailing list
R-SIG-Mac@stat.math.ethz.ch
https://stat.ethz.ch/mailman/listinfo/r-sig-mac
