On Mon, 5 Apr 2004, Shin, Daehyok wrote:
> Hm. Smarter than I expected.
> But, any special reason why the 6th line clones another vector?
> To me, just reference copy seems to be enough for the purpose.
>
> 6 xf = date.frame(x=x)
>
You would have to look at the code for data.frame to see this, bu
Of Thomas Lumley
> Sent: Monday, April 05, 2004 PM 5:18
> To: Shin, Daehyok
> Cc: R, Help
> Subject: Re: [R] Deep copy in R
>
>
> On Mon, 5 Apr 2004, Shin, Daehyok wrote:
>
> > I am handling spatial data of huge volumes,
> > so sensitive to the silent duplication of
On Mon, 5 Apr 2004, Shin, Daehyok wrote:
> I am handling spatial data of huge volumes,
> so sensitive to the silent duplication of data in script programs.
> In the following R program, exactly when is the vector data deeply copied?
> Thanks in advance.
>
> 1 v <- 1:1
> 2 z <- f(v)
>
> ---
I am handling spatial data of huge volumes,
so sensitive to the silent duplication of data in script programs.
In the following R program, exactly when is the vector data deeply copied?
Thanks in advance.
1 v <- 1:1
2 z <- f(v)
- function f --
3 f <- function(x) {
4 y = x
