4.74 FAQ-1220 How to download R packages from specific CRAN mirror by default?

R-Packages-CRAN-Mirror

Last Update: 6/20/2025

R supports downloading R packages from different CRAN mirrors.

If the default mirror is slow, you can change to use another mirror as default:

1. Run Notepad as Administrator (right-click and select Run as Administrator). Browse and open the following file:
   C:\Program Files\R\R-4.5.0\etc\Rprofile.site
2. Locate and edit set a CRAN mirror section to specify the default mirrors. For example,

   # set a CRAN mirror
    local({r <- getOption("repos")
   	r["CRAN"] <- "https://mirrors.tuna.tsinghua.edu.cn/CRAN/"
   	r["Mirror1"] <- "https://ftp.yz.yamagata-u.ac.jp/pub/cran/"
   	r["Mirror2"] <- "https://ftp.fau.de/cran/"
   	r["Mirror3"] <- "https://cran.yu.ac.kr/"
          options(repos=r)})

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Keywords:R package, CRAN mirror, install.packages(), repository