[R] Rprofile.site and automatic installation of missing packages
Duncan Murdoch
murdoch@dunc@n @end|ng |rom gm@||@com
Tue Mar 21 13:55:13 CET 2023
?Startup says: "Note that when the site and user profile files are
sourced only the base package is loaded, so objects in other packages
need to be referred to by e.g. utils::dump.frames or after explicitly
loading the package concerned."
So you need utils::installed.packages and utils::install.packages .
Duncan Murdoch
On 21/03/2023 8:04 a.m., PIKAL Petr wrote:
> Dear all.
>
>
>
> I am trying to install missing (not installed) packages during startup of R
> through code in Rprofile.site but I miserably failed and I am not sure what
> I am doing wrong.
>
>
>
> R is installed to C:Program files but it is not writable for the users,
> therefore I cannot change Rprofile.site located in root etc directory. I
> however can put Rprofile.site in users home directory (Documents) and use it
> for R startup setting (partly).
>
> However I want for less experienced users to put a code here to check
> installed packages, check if some specified set of packages is installed and
> install them, but it is not working.
>
>
>
> The code in Rprofile.site is:
>
>
>
> #**********
>
> test <- scan("pack.txt", character(), quote = "")
>
> inst <- installed.packages()
>
> install.packages(test[!test %in% inst], repos="https://cloud.r-project.org")
>
> #**********
>
>
>
> An example of pack.txt is e.g.
>
> ggplot2
>
> zoo
>
>
>
> but the code is not executed and packages are not installed. If I use this
> code after R starts, everything is OK and packages are installed to
>
>
>
>> Sys.getenv("R_LIBS_USER")
>
> [1] "C:\\Users\\PikalP\\AppData\\Local/R/win-library/4.2"
>
>>
>
> The same applies if I put e.g. library(MASS) in the Rprofile.site, the
> package is not loaded but after R is live, library(MASS) loads a package.
>
>
>
> So my question is What is the best way to check after fresh R installation
> if some predefined set of packages is installed and if not, perform an
> installation without user intervention in Windows environment?
>
>
>
> S pozdravem | Best Regards
>
> Petr
>
>
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