A shortcut function for install.packages() and library()

September 10, 2011

(This article was first published on R HEAD, and kindly contributed to R-bloggers)

I enjoy trying difference kind of R packages. Since I have more than 1 computers (1 at home, 1 at office and a laptop)
it is troublesome to check whether I have installed some new packages for each computer. Therefore i wrote a function to load and install packages at once. If the package does not exist, then the it will be downloaded from CRAN and be loaded it.

packages<-function(x, repos="http://cran.r-project.org", ...){
   x <- deparse(substitute(x))
   if (!require(x,character.only=TRUE)){
      install.packages(pkgs=x, repos=repos, ...)

Thanks richierocks for the suggestion of using deparse(substitute(x)) in the code.


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