R - upgrade all packages

• How to upgrade R?

There is this package, which you can use .... but you must have it installed before new version of R come ;-) - otherwise it is typical "catch 22":

Upgrade from 3.3.1  to 3.3.2 :

install.packages('installr', repos = 'http://cran.us.r-project.org') 

Warning message: 

package ‘installr’ is not available (for R version 3.3.1)

So basically - instead this go to https://cran.r-project.org/ and update using new R.

• How to upgrade all your existing R packages (libraries)?

Use this command to upgrade all existing packages:

install.packages(
  .libPaths()[1],
  pkgs = as.data.frame(installed.packages(.libPaths()[1]), stringsAsFactors=FALSE)$Package,
  type = 'source'
)

And quick update - to the article ;-) - use this instead:

update.packages()

update.packages(ask = FALSE, dependencies = c('Suggests'))

Have a fun!