How to install R packages via proxy [user + password]

Question

I need authentication to use internet, say these are my variables:

1. Proxy : 1ncproxy1
2. Port : 80
3. Loggin : MyLoGiN
4. Pass : MyPaSs
<

Answer 1

+1 for Juba, above. This worked for me:

$ export http_proxy=http://username:password@the-proxy.mycompany.com:80
$ R
> install.packages("quantmod")