resinstalling packages in R after update
This is old - by should still work :) - comment on how to do this in 2019 below …
The new version 2.13.0 of R has just been released and with the update comes the pain of re-installing all the packages from the old installation on the new one.
Stackoverflow to the rescue! This posting provides a simple two step process of first writing a list of packages into a file on the disk in the old version, installing the new version and then comparing the exported list to the currently installed packages in the new version with setdiff. I just went through the process and have to say that it is deadeasy! Below the code:
- run in the old version of R
packages <- installed.packages()[,"Package"] save(packages, file="Rpackages") `
- Install new R version
- run in the new version
load("Rpackages") for (p in setdiff(packages, installed.packages()[,"Package"])) install.packages(p)
At the end of the day this is outdated - with the new RStudio version you can simply add your packages with
library() and then simply click on
install packages in the RStudio interface.