How can I set a specific CRAN mirror permanently in R?
I want to set it permanently in my laptop so that when I do install.packages()
, it won't ask me again which mirror to choose.
You can set repos in your .Rprofile to restore your choice every time you start R
Edit: to be more precise:
Add
options(repos=c(CRAN="THE URL OF YOUR FAVORITE MIRROR"))
to your .Rprofile, located in the home directory of your user.
You can find a list of CRAN mirrors here.
Example:
# add this line to ~/.Rprofile, restart your R session so it takes effect
options(repos=c(CRAN="https://cran.r-project.org"))
Alternatively, you can set the mirror site-wide in your Rprofile.site
. The location of the file is given by ?Startup
:
The path of this file is taken from the value of the
R_PROFILE
environment variable (after tilde expansion). If this variable is unset, the default isR_HOME/etc/Rprofile.site
, which is used if it exists (which it does not in a 'factory-fresh' installation).
So do Sys.getenv("R_PROFILE")
for the first option, or Sys.getenv("R_HOME")
or R.home()
for the second option. On macOS, the location of the second is /Library/Frameworks/R.framework/Resources/etc/
.
The file may not exist, or you may see the following lines commented out :
# set a CRAN mirror
# local({r <- getOption("repos")
# r["CRAN"] <- "http://my.local.cran"
# options(repos=r)})
So remove the comment marks and change "http://my.local.cran" to the correct website, e.g.:
local({r <- getOption("repos")
r["CRAN"] <- "https://cran.r-project.org"
options(repos=r)})