Re: [R] copy contributed packages from R 2.2.0 to 2.2.1

From: Michael Prager <Mike.Prager_at_noaa.gov>
Date: Sat 24 Dec 2005 - 06:31:46 EST

When I asked this question, I got some good answers. Based on them, I wrote a pair of functions to accomplish this. I have tested them in exactly ONE installation, and they worked.

Of course these are not needed by R gurus, but I attach them (with many more comment lines than actual source) for the use of anyone else who would like to use them.

MHP Helmut Kudrnovsky wrote on 12/23/2005 9:43 AM:

>hi R-users,
>
>a few days ago R 2.2.1 came out. on my win xp i'installed R 2.2.0. along the time i've installed a lot of contributed packages. my internet-connection is not very fast.
>
> so my question: is it possible after installing R 2.2.1 to do copy/paste the contributed packages from the C:\Programme\R221 to the C:\Programme\R2.2.1- location in the files system?
>
>or have i to download and install the packages new?
>
>
>

##################################################################################
# Functions to (1) save names of installed package from an R installation to #
# a file and (2) install the same packages on a new R installation. #
##################################################################################
#  HOW TO MOVE PACKAGES FROM ONE R INSTALLATION TO 
ANOTHER:                      #

# Put this file in your R working directory. Source it. Run SaveMyPackages() #
# under the old installation. Save your workspace and exit. Open the new #
# installation on the same directory. Run InstallMyPackages(). The packages #
# will be installed. You may now rm(SaveMyPackages,InstallMyPackages) if you #
# like. Also, you may delete the file "pkg.list" in the working directory. #
##################################################################################
#  M. H. Prager      
mike.prager@noaa.gov                                        #
#  with much from posted code of U. Ligges, H. Nilsson, & B. Ripley   
           #
#  December, 
2005                                                                #
##################################################################################

SaveMyPackages <- function(filename = "pkg.list", savepkg = TRUE)

   {  #  Saves a character vector with names of non-default
      #  packages installed. Writes it to a "dput" ASCII file.
      #  ---> Run this from "old" installation. <---
      #  Arguments:
      #     filename --    Character, name of file to write.
      #     savepkg --     Logical, if TRUE save the file; if not, return
      #                    the vector of package names instead.
      foo <- installed.packages()
      foo <- as.vector(foo[is.na(foo[, "Priority"]), 1])
      if (savepkg) dput(foo, file = filename) else return(foo)
   }

InstallMyPackages <- function(x = dget(file = filename), filename = "pkg.list",

      install = TRUE)

   {  #  Install or print list of packages .
      #  ---> Run this from "new" installation. <---
      #  Arguments:
      #     x--         character, contains names of packages to 
install; default is
      #                 vector read from argument "filename".
      #     filename--  character, name of file containing vector (in 
dput format);
      #                 default is "pkg.list" as in SaveMyPackages.
      #     install--   logical, should actual installation be done?  If 
not,
      #                 the vector of package names in x is returned instead
      #                 of being installed.
      if (install) install.packages(x) else return(x)
   }
##################################################################################

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