I'm not sure which version of R you are using, but the latest stable version is 3.1.2. If the package installation warning indicates that the package you are trying to install is not available, this basically means that the package developer has not yet created a version of the package compatible with the version of R that you are currently using.
If you really need to use this package (if your work is highly dependent on it, and you are in some deadline), I would advise you to install an earlier version of R (for example, 3.1.1 or 3.1) and do your work with it .
I would also like to suggest you turn to Revolution Analytics, as Andri suggested.
Thanks!
Abdou source share