R: Select a CRAN Mirror

chooseCRANmirror {utils}

R Documentation

Select a CRAN Mirror

Description

Interact with the user to choose a CRAN mirror.

Usage

chooseCRANmirror(graphics = getOption("menu.graphics"), ind = NULL,
                 local.only = FALSE)

getCRANmirrors(all = FALSE, local.only = FALSE)

Arguments

graphics

Logical. If true, use a graphical list: on Windows or the macOS GUI use a list box, and on a Unix-alike use a Tk widget if package tcltk and an X server are available. Otherwise use a text menu.

ind

Optional numeric value giving which entry to select.

all

Logical, get all known mirrors or only the ones flagged as OK.

local.only

Logical, try to get most recent list from the CRAN master or use file on local disk only.

Details

A list of mirrors is stored in file ‘R_HOME/doc/CRAN_mirrors.csv’, but first an on-line list of current mirrors is consulted, and the file copy used only if the on-line list is inaccessible.

chooseCRANmirror is called by a Windows GUI menu item and by contrib.url if it finds the initial dummy value of options("repos").

HTTPS mirrors with mirroring over ssh will be offered in preference to other mirrors (which are listed in a sub-menu).

ind chooses a row in the list of current mirrors, by number. It is best used with local.only = TRUE and row numbers in ‘R_HOME/doc/CRAN_mirrors.csv’.

Value

None for chooseCRANmirror(), this function is invoked for its side effect of updating options("repos").