# Changing the default library folder path in R

G30th November 2017

TR

A simple procedure in Microsoft Windows for setting the default library folder for installations of R.

Installations of R will tend to install libraries at C:/Program Files/R/R-X.X.X/library, which may not always be writable. The only way to effectively change this default resides outside of R in Microsoft Windows.

In the Microsoft Control Panel, go to System and Security > System > Advanced system settings > Environment variables.

The environment variables panel in Microsoft Windows 10.

A new environment variable should be created by clicking on “New…” and entering R_LIBS_USER as the variable name and C:\Path\To\R-Libraries as the variable path (change as appropriate).

Save the changes and restart R. Packages should now be saved to the new location.

## The PowerShell Method

Another method for achieving this in the command line is via Windows PowerShell:

[Environment]::SetEnvironmentVariable("R_LIBS_USER", "C:\Path\To\R-Libraries", "User")