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 <- 1:10000
2 z <- f(v)
--------- function f ----------
3 f <- function(x) {
4 y = x
5 y[10] = 1
6 xf = date.frame(x=x)
7 xf$x[10] = 1
8 return(y)
}
Daehyok Shin
Terrestrial Hydrological Ecosystem Modellers
Geography Department
University of North Carolina-Chapel Hill
[EMAIL PROTECTED]
"We can do no great things,
only small things with great love."
- Mother Teresa
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