Run R script from command line

Question

I have a file, called a.r, it has a chmod of 755,

sayHello <- function(){
   print(\'hello\')
}

sayHello()

Ho

Answer 1

This does not answer the question directly. But someone may end up here because they want to run a oneliner of R from the terminal. For example, if you just want to install some missing packages and quit, this oneliner can be very convenient. I use it a lot when I suddenly find out that I miss some packages, and I want to install them to where I want.

• To install to the default location:

  R -e 'install.packages(c("package1", "package2"))'
  

• To install to a location that requires root privileges:

  R -e 'install.packages(c("package1", "package2"), lib="/usr/local/lib/R/site-library")'