Command Line Option Parsing for R

README.md

About

A quick script to explore one of the options for using command line args for an R script.

https://twitter.com/BrockTibert/status/1076844910022660096

• good quick review: -- http://blog.sellorm.com/2017/12/30/command-line-utilities-in-r-pt-6/

command-testing.R

options(stringsAsFactors = FALSE)

## load the libraries
library(optparse)

## create the options
parser <- OptionParser()
parser <- add_option(parser, c("-c", "--count"), 
                     type="integer",
                     default = 5, 
                     help = "How many things to return")
                    
## parse the things
cargs = parse_args(parser)

## do the thing
runif(cargs$count)

run-script.md

To run the script:

Rscript command-testing.R

and this will return the following within the terminal

[1] 0.6045390 0.8331392 0.7229302 0.1976436 0.3871353