library() seems to remember the location of a package when I give it a
lib.loc, and then use that version thereafter, even if I don't supply
lib.loc again. Is there any way I can load different versions of a
package in one R session? -- I don't seem to able to simply detach the
package and then load a different version from a different library location.
$ R
[...startup info...]
> # only version we currently know about is in the standard library
> .find.package("ExamplePackage")
[1] "c:/R/R-2.4.1/library/ExamplePackage"
> # load a version from a different library e:/devinst
> library(ExamplePackage, lib.loc="e:/devinst")
> # and check we've got the right version ... yes
> system.file(package="ExamplePackage")
[1] "e:/devinst/ExamplePackage"
> .find.package("ExamplePackage")
[1] "e:/devinst/ExamplePackage"
> detach(2)
>
> # Now I'd like to load the version in the standard library.
> # .find.package() finds the version I want
> .find.package("ExamplePackage")
[1] "c:/R/R-2.4.1/library/ExamplePackage"
> # but library() loads the same version it did before, even
> # though I don't supply lib.loc, and .libPaths is untouched.
> library(ExamplePackage)
> system.file(package="ExamplePackage")
[1] "e:/devinst/ExamplePackage"
> .find.package("ExamplePackage")
[1] "e:/devinst/ExamplePackage"
> .libPaths()
[1] "c:/R/R-2.4.1/library"
> sessionInfo()
R version 2.4.1 (2006-12-18)
i386-pc-mingw32
locale:
LC_COLLATE=English_United States.1252;LC_CTYPE=English_United
States.1252;LC_MON
ETARY=English_United States.1252;LC_NUMERIC=C;LC_TIME=English_United
States.1252
attached base packages:
[1] "stats" "graphics" "grDevices" "utils" "datasets" "methods"
[7] "base"
other attached packages:
ExamplePackage
"1.0"
>
Am I doing something wrong here? I can't find any mention of
persistence of package location in ?library.
thanks for any help or suggestions,
Tony Plate
______________________________________________
[EMAIL PROTECTED] mailing list
https://stat.ethz.ch/mailman/listinfo/r-devel
