3 messages · Tamas K Papp, Roger D. Peng, Duncan Murdoch
How can I start a local scope inside an R function? Eg in
b
Error: object "b" not found
f <- function() {
+ {
+ b <- 1
+ }
+ b+2
+ }
f()
[1] 3 I would like f() to report an error, not finding b. I am thinking about something like let in Scheme/Lisp. Thanks, Tamas
Try
f <- function() {
local({
b <- 1
})
b + 2
}
How can I start a local scope inside an R function? Eg in
b
Error: object "b" not found
f <- function() {
+ {
+ b <- 1
+ }
+ b+2
+ }
f()
[1] 3 I would like f() to report an error, not finding b. I am thinking about something like let in Scheme/Lisp. Thanks, Tamas
______________________________________________ R-devel at r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
Roger D. Peng | http://www.biostat.jhsph.edu/~rpeng/
How can I start a local scope inside an R function? Eg in
b
Error: object "b" not found
f <- function() {
+ {
+ b <- 1
+ }
+ b+2
+ }
f()
[1] 3 I would like f() to report an error, not finding b. I am thinking about something like let in Scheme/Lisp.
The local() function does this:
> f <- function() {
+ local({ b <- 1 })
+ b + 2
+ }
> f()
Error in f() : object "b" not found