Not able to install R commander (Rcmdr) in rstudio

[cderv]

This is a duplicate of this post where I believe the answer works

Rcmdr not available

When you go on CRAN page for Rcmdr you'll see that it depends on R > 3.5.0. This is why, the package is not available to you - you should not find it in the table available.packages() that filters by default according to the R version. See ?available.packages about built in filter. As you are on R version 3.4.4, you'll need to install a former version. Previous one, 2.5.0 should be fine according to the DESCRIPTION file from this version Try something like remotes::install_version("Rcmdr", "2.5.0") and see how it goes.