─atma@gauss  ~/Downloads
╰─$ R < tweet-engangement.R --no-save tweet_activity_metrics_patmatzidis_20150426_20150524_en.csv test                                                                         1 ↵
ARGUMENT 'tweet_activity_metrics_patmatzidis_20150426_20150524_en.csv' __ignored__

ARGUMENT 'test' __ignored__


R version 2.15.2 (2012-10-26) -- "Trick or Treat"
Copyright (C) 2012 The R Foundation for Statistical Computing
ISBN 3-900051-07-0
Platform: i386-apple-darwin9.8.0/i386 (32-bit)

R is free software and comes with ABSOLUTELY NO WARRANTY.
You are welcome to redistribute it under certain conditions.
Type 'license()' or 'licence()' for distribution details.

R is a collaborative project with many contributors.
Type 'contributors()' for more information and
'citation()' on how to cite R or R packages in publications.

Type 'demo()' for some demos, 'help()' for on-line help, or
'help.start()' for an HTML browser interface to help.
Type 'q()' to quit R.

> #!/usr/bin/env Rscript
> library(ggplot2)
> library(plyr)
>
> # Process command-line arguments
> args <- commandArgs(trailingOnly = TRUE)
> if (length(args) != 2)
+   stop("usage: tweet-engangement input-file output-base-name")
Error: usage: tweet-engangement input-file output-base-name
Execution halted