re| `By reference'
David Brahm <brahm at alum.mit.edu> wrote:
VBMorozov at lbl.gov wrote:
I would like to pass variables to a function in R in "by reference"...
Just in case the ensuing discussion got too esoteric, here's one simple
answer:
R> x <- 1:10 R> MyFunc <- function(x, zz) assign(deparse(substitute(zz)), sum(x), 1) R> MyFunc(x,y) R> y [1] 55
Still less esoteric is
MyFunc <- function(x,zz) zz <<- sum(x) MyFunc(1:10,y) y
[1] 55 Although I don't know if this is a good general solution to `passing by reference' (BTW it behaves differently in S+
MyFunc <- function(x,zz) zz <<- sum(x) MyFunc(1:10,y)
[1] 55
y
[1] 1 2 3 4 5 6 7 8 9 10 )
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