How do you change library location in R? [duplicate]

Question

Due to the new R 2.11 release, I want to implement Dirk's suggestion here.

So for that I am asking - How can I (permanently) change R's library path? (The best solution would be one that can be run from within R)

Answer 1

You can edit Rprofile in the base library (in 'C:/Program Files/R.Files/library/base/R' by default) to include code to be run on startup. Append

########        User code        ######## .libPaths('C:/my/dir') 

to Rprofile using any text editor (like Notepad) to cause R to add 'C:/my/dir' to the list of libraries it knows about.

(Notepad can't save to Program Files, so save your edited Rprofile somewhere else and then copy it in using Windows Explorer.)

Answer 2

I've used this successfully inside R script:

library("reshape2",lib.loc="/path/to/R-packages/") 

useful if for whatever reason libraries are in more than one place.