I used R 3.6 for all my projects but ever since I upgraded to R 4.0.2, nearly all the drafts that work previous beautifully are now all disabled after upgrade. I am seeking for the advices from the community and am asking instruction of how to reverse to where I was before (R 3.6.3) to be able to catch up on my projects now. Thank you!
Many packages require re-installation following major releases. If time is exigent, downversioning
R is possible. The details vary according to the operating system. CRAN's site makes it infeasible to link to specific pages. Search there for this example for
Debian stretch (oldstable)
For a backport of R 3.6.3 to stretch, please add
deb http://cloud.r-project.org/bin/linux/debian stretch-cran35/
to the file
/etc/apt/sources.list on your computer.
Please note that R packages from the Debian stretch distribution are not compatible with R 3.5.x, as it provides r-api-3.5, while the stretch packages depend on r-api-3.
Also, local packages installed before the update to R 3.5.0 will not work correctly if they use compiled code.
R packages you have compiled locally can be updated using
update.packages(lib.loc="/usr/local/lib/R/site-library", ask=FALSE, checkBuilt=TRUE)
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