Is there a way to install R packages using emacs?

From help(Startup):

 ## Example of Rprofile.site
 local({
   # add MASS to the default packages, set a CRAN mirror
   old <- getOption("defaultPackages"); r <- getOption("repos")
   r["CRAN"] <- "http://my.local.cran"
   options(defaultPackages = c(old, "MASS"), repos = r)
   ## (for Unix terminal users) set the width from COLUMNS if set
   cols <- Sys.getenv("COLUMNS")
   if(nzchar(cols)) options(width = as.integer(cols))
 })

C-c C-e i

It will take a few seconds to load all packages.

http://www.emacswiki.org/emacs/anything-R.el works well for me.