Run R script from command line -

Run R script from command line -

i have file, called a.r, has chmod of 755,

sayhello <- function(){ print('hello') } sayhello()

how can run via command-line?

if want output print terminal best utilize rscript

rscript a.r

note when using r cmd batch a.r instead of redirecting output standard out , displaying on terminal new file called a.rout created.

r cmd batch a.r # check output cat a.rout

if want utilize ./a.r way of calling script add together appropriate #! top of script

#!/usr/bin/env rscript sayhello <- function(){ print('hello') } sayhello()

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