Default installation of R on Windows stored files (and thus library) on a dedicated folder per R version on program files.
That means that by default, you would work with several versions of R in parallel and thus separate libraries.
If this not what you want and you prefer to always work with a single R instance you wan't to gradually update, it is recommended to modify the R installation folder. In wizard, just specify this folder (I personally use
c:\stats\R). Then, for any upgrade, one possibility is to overwrite this R. Whether you also want to upgrade (all) packages is a delicate choice as it may break some of your code (this appeared for me with the
tmpackage). You may:
If you want to upgrade all packages - without any check, you can call use
packageStatus as in:
pkgs <- packageStatus() # choose mirror upgrade(pkgs)
Finally, there exists a very convenient package to perform all operations, namely
installr, even coming with a dedicated gui. If you want to use gui, you must use Rgui and not load the package in RStudio. Using the package with code is as simple as:
install.packages("installr") # install setInternet2(TRUE) # only for R versions older than 3.3.0 installr::updateR() # updating R.
I refer to the great documentation https://www.r-statistics.com/tag/installr/ and specifically the step by step process with screenshots on Windows:https://www.r-statistics.com/2015/06/a-step-by-step-screenshots-tutorial-for-upgrading-r-on-windows/
Note that still I advocate using a single directory, ie. removing reference to the R version in installation folder name.