[R] How to check the available of a package on R repo

[Stephen Liu]

Hi folks,

Debian 504 64-bit

What is the correct syntax to check the available of a package on R repo?

> available.packages("emacs", "OS_type=linux")
Warning: unable to access index for repository emacs
     Package Version Priority Depends Imports LinkingTo Suggests Enhances
     OS_type License File Repository

> available.packages("emacs")
Warning: unable to access index for repository emacs
     Package Version Priority Depends Imports LinkingTo Suggests Enhances
     OS_type License File Repository

TIA

B.R.
Stephen L