chooseCRANmirror
Comprehensive R Archive Network

### Description

Finds and chooses a CRAN mirror from which to download R packages.

### Usage

    chooseCRANmirror(graphics = getOption("menu.graphics", default = FALSE),
    ind = NULL, useHTTPS = getOption("useHTTPS", TRUE))
    getCRANmirrors(all = FALSE, local.only = FALSE)

### Arguments

graphics | This argument is ignored.
ind | A positive integer. If NULL (the default), then chooseCRANmirror displays a menu of CRAN mirror sites from which to choose. Otherwise, ind should specify the entry in the output of getCRANmirrors() to use as the CRAN mirror. (Mirror 1, at https://cran.rstudio.com, is generally a good choice.)
useHTTPS | A logical value. If TRUE (the default), then the menu displays only the CRAN mirrors using the secure http (https) protocol. If FALSE, then the menu displays only the CRAN mirrors using the nonsecure (http) protocol.
all | All arguments to getCRANmirrors are ignored at this time.
local.only | All arguments to getCRANmirrors are ignored at this time.

### Details

The Comprehensive R Archive Network stores several thousand R packages. To spread the load and shorten communication times, you are encouraged to choose a mirror of CRAN that is close to you.
The mirror https://cran.rstudio.com is mirrored in many places, so it is a usually a good choice.
chooseCRANmirror stores your choice of mirrors in the "CRAN" element of the list of repositories in getOption("repos"). available.packages() checks if getOption("repos")["CRAN"] has the special value "@CRAN@", and if it does, and if the current Spotfire Enterprise Runtime for R session is an interactive session, getOption("repos")["CRAN"] calls chooseCRANmirror() to prompt the user to choose a repository.
Value

getCRANmirrors | returns a data.frame containing information about each mirror site. The data.frame contains the columns "Name", "Country", "City", "URL", "Host", "Maintainer", "OK", "CountryCode", and "Comment".
chooseCRANmirror | returns NULL invisibly. This function is called for its side effect of setting getOption("repos")["CRAN"].

See Also
install.packages, available.packages, options.
Examples

    head(getCRANmirrors()$URL)

Package utils version 6.1.5-18
Package Index