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
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