Sorry. I think this "problem" was actually the same one as my previous
post where I set my library path wrong. Once I set it correctly both
versions worked fine.
On 9/5/05, Gabor Grothendieck <[EMAIL PROTECTED]> wrote:
> I have found a problem with R 2.2.0 under Windows XP.
>
> Under R 2.1.1 patched I get the following result as expected. First
> we define a function f which displays the names of its arguments,
> rather than their values. We define a variable x whose value
> is an environment and whose class is c("x", "environment").
> f(x, x) then gives the expected result of "x" and "x". If,
> if we assign f to "[.x" then x[x] also gives "x" and "x" as
> expected under R 2.1.1 patched but _not_ under R 2.2.0.
>
> First we show it under R 2.1.1 where everything works as expected:
>
> > f <- function(x, y) { print(deparse(substitute(x)));
> > print(deparse(substitute(y))) }
> > x <- .GlobalEnv
> > class(x) <- c("x", "environment")
> > f(x, x)
> [1] "x"
> [1] "x"
> > "[.x" <- f
> > x[x] ########## this is what we would have expected so its ok
> [1] "x"
> [1] "x"
> >
> > R.version.string
> [1] "R version 2.1.1, 2005-06-23"
>
> Now lets repeat the above under R 2.2.0 and we see that f(x,x)
> works as expected but not x[x] even though "[.x" has set to equal f.
> Unlike the situation in R 2.1.1 now f(x,x) and x[x] give
> different results even though "[.x" was set to equal f.
>
> > f <- function(x, y) { print(deparse(substitute(x)));
> > print(deparse(substitute(y))) }
> > x <- .GlobalEnv
> > class(x) <- c("x", "environment")
> > f(x, x)
> [1] "x"
> [1] "x"
> > ################# now x[x] and f(x,x) should give same result
> > "[.x" <- f
> > x[x] ####################### does not give the same as f(x,x)
> [1] "<environment>"
> [1] "<environment>"
> >
> > R.version.string
> [1] "R version 2.2.0, 2005-09-03"
>
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