Rprofile.site and automatic installation of missing packages
?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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