Install R on Linux Mint 18.2 Sonya Mate

I tried to install R on Mint without success. Here are instructions, that I already tried to follow on YouTube : sudo apt-get install r-base [sudo] password for xwing: Reading package lists... Done Building dependency tree Reading state information... Done E: Unable to locate package r-base Digging more, I found something [here](http://emilkirkegaard.dk/en/?p=6320) about PPA and repository that have to be manually included, but I don't know how to exactly apply this on Mint. **Note:** I was an Ubuntu user that recently migrated to Linux Mint. Someone told me that Mint is very similar to Ubuntu. In fact, some commands for Ubuntu works fine on Mint, but in this case, I'm asking myself if any minor changes should be made to Ubuntu lines to aid proper execution on Mint.