Current R version as 3.4.3 ,indicated at start-up.

Check the current R version

R.version

Define list of packages to check and load

list.of.packages = c('devtools')

Check packed installed and install if not.

new.packages = list.of.packages[!(list.of.packages %in% installed.packages()[,"Package"])]

if (length(new.packages)) install.packages(new.packages)

Load package

library(devtools)

Intall updateR package

install_github('andreacirilloac/updateR')

Load the updateR package, and call the function to start the update.

library(updateR)

updateR(admin_password = "mySecretPassword")

Progress of the installation as indicated below.

Print version of R after update

R.version