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
)
--
Steve Wisdom
http://208.202.87.68/subsidiaries/subsdeep.asp
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