Just did some more testing.....May the problem be due to the fact that I am
using a windows machine? I just ran the same code on a Linux machine and
everything worked fine.
If windows (or the file system of the disk) caused the problem, is there any
way to resolve it? I know that using Linux would be a better choice ;-) but
unfortunatley this in no option at the moment....
Best
Jannis
--- Jannis <bt_jan...@yahoo.de> schrieb am Mi, 4.5.2011:
> Von: Jannis <bt_jan...@yahoo.de>
> Betreff: [R] Problems saving ff objects
> An: r-help@r-project.org
> Datum: Mittwoch, 4. Mai, 2011 13:17 Uhr
> Dear list,
>
>
> I am trying to understand and use the ff package. As I had
> some problems saving some ff objects, and as I did not fully
> manage to understand the whole concept of *.ff, *.ffData and
> *.RData with the help of the documentation, I tried to
> reproduce the examples from the help of ffsave.
>
> When I ran, however : (copied from the help)
>
> message("let's create some ff objects")
> n <- 8e3
> a <- ff(sample(n, n, TRUE), vmode="integer",
> length=n, filename="d:/tmp/a.ff")
> b <- ff(sample(255, n, TRUE), vmode="ubyte",
> length=n, filename="d:/tmp/b.ff")
> x <- ff(sample(255, n, TRUE), vmode="ubyte",
> length=n, filename="d:/tmp/x.ff")
> y <- ff(sample(255, n, TRUE), vmode="ubyte",
> length=n, filename="d:/tmp/y.ff")
> z <- ff(sample(255, n, TRUE), vmode="ubyte",
> length=n, filename="d:/tmp/z.ff")
> df <- ffdf(x=x, y=y, z=z)
> rm(x,y,z)
>
> message("save all of them")
> ffsave.image("d:/tmp/x")
>
> I get:
>
> Error in ffsave(list = ls(envir = .GlobalEnv, all.names =
> TRUE), file = outfile, :
> the previous files do not match the rootpath (case
> sensitive)
>
>
> Whats wrong here? Should this not be working as I did not
> change anything in the code?
>
>
>
> Cheers
> Jannis
>
>
> > sessionInfo()
> R version 2.12.0 (2010-10-15)
> Platform: i386-pc-mingw32/i386 (32-bit)
>
> locale:
> [1] LC_COLLATE=English_United States.1252
> [2] LC_CTYPE=English_United States.1252
> [3] LC_MONETARY=English_United States.1252
> [4] LC_NUMERIC=C
>
> [5] LC_TIME=English_United States.1252
>
> attached base packages:
> [1] tools stats
> graphics grDevices utils
> datasets methods
> [8] base
>
> other attached packages:
> [1] ff_2.2-2 bit_1.1-7 rj_0.5.2-1
>
> loaded via a namespace (and not attached):
> [1] rJava_0.8-8
>
>
>
>
> ______________________________________________
> R-help@r-project.org
> mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained,
> reproducible code.
>
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