I think the issue is that dput() and dget() don't work for some more complex structures (as you point out, they do appear to work for simple structures). The R Data Import/Export manual doesn't mention using dput and dget to transfer objects between R and S-PLUS, perhaps because these functions have limited coverage?

E.g.:

S-PLUS6.1> junk <- list(f=as.name("g"))
S-PLUS6.1> dput(junk,"junk1.dat")
S-PLUS6.1> data.dump("junk", file="junk2.dat", oldStyle=F)
S-PLUS6.1> data.dump("junk", file="junk3.dat", oldStyle=T)

R> dget("junk1.dat")
Error in eval(expr, envir, enclos) : Object "g" not found
R> # with package "foreign" loaded
R> data.restore("junk2.dat")
Error in ReadSdump(TRUE, " ") : S mode "junk" (near byte offset 45) not supported
In addition: Warning message:
NAs introduced by coercion
R> data.restore("junk3.dat")
[1] "junk3.dat"
R> junk
$f
g


>

-- Tony Plate

At Wednesday 11:45 AM 8/25/2004, Rolf Turner wrote:

I'm puzzled by the discourse in this thread.  Briefly, dput() and
dget() seem to work just fine for me.

I tried

        > junk <- list(x=rnorm(20),y=sample(1:100,12,TRUE))
        > dput(junk,"junk.dat")

in Splus (Version 6.1.2 Release 2 for Sun SPARC, SunOS 5.6 : 2002)

and then in R

        > junk <- dget("junk.dat")

R version:

platform sparc-sun-solaris2.9
arch     sparc
os       solaris2.9
system   sparc, solaris2.9
status
major    1
minor    9.1
year     2004
month    06
day      21
language R

There were no complaints, and typing ``junk'' in the R window
and in the Splus window appeared to produce indentical results.

So what's the problem?

                                cheers,

                                        Rolf Turner
                                        [EMAIL PROTECTED]

Tony Plate wrote:

> Have you tried following the advice in the R Data Import/Export manual? It
> suggests the following:
>
> >Function data.restore reads S-PLUS data dumps (created by data.dump) with
> >the same restrictions (except that dumps from the Alpha platform can also
> >be read).
> >It should be possible to read data dumps from S-PLUS 5.x and 6.x written with
> >data.dump(oldStyle=T).
>
> -- Tony Plate
>
> At Wednesday 10:29 AM 8/25/2004, Zachary Skrivanek wrote:
> >Hello! I would like to be able to read in list data objects in R/S
> >created in R/S. (Ie R->S or S->R.) I have tried 'dput' and 'dump' in S,
> >but neither of the created files could be read into R (with 'dget' nor
> >'source'). Is there any way that I can save a list object in S that can
> >be read into R?
> >
> >Sincerely,
> >Zachary Skrivanek, PhD
> >Research Scientist
> >Program Phase Statistics-Endocrine


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