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.
If you are downloading R from CRAN, the following CRAN mirrors support HTTPS and we recommend using one of them: CRAN master (Austria): https://cran.r-project.org/ RStudio (USA): https://cran.rstudio.com/ Revolution Analytics (USA): https://cran.revolutionanalytics.com/
CRAN is a network of ftp and web servers around the world that store identical, up-to-date, versions of code and documentation for R. Please use the CRAN mirror nearest to you to minimize network load.
You can set repos in your .Rprofile to restore your choice every time you start R
Edit: to be more precise:
Add
options(repos=structure(c(CRAN="YOUR FAVORITE MIRROR")))
to your .Rprofile
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"] <- "http://cran.r-project.org"
options(repos=r)})
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