littler
TLDR
Run R expression
$ r -e "print('Hello')"
Run R script$ r [script.R]
Install package$ r -e "install.packages('[package]')"
Pipe data to R$ echo "[1,2,3]" | r -e "sum(scan())"
Run with arguments$ r [script.R] [arg1] [arg2]
SYNOPSIS
r [options] [script] [args...]
DESCRIPTION
littler (r) provides a shebang-capable scripting interface for R. It allows running R code from the command line and in scripts, making R more accessible for shell scripting and automation.
littler starts faster than R --vanilla by avoiding R's full initialization.
PARAMETERS
-e expr
Evaluate expression.-p
Print result.-l package
Load package.-i
Interactive mode.-n
No implicit printing.-t
Use temporary directory.-v
Verbose output.
SHEBANG USAGE
$ #!/usr/bin/env r
args <- commandArgs(TRUE)
print(paste("Hello", args[1]))
args <- commandArgs(TRUE)
print(paste("Hello", args[1]))
CAVEATS
Must be installed separately from R. The command 'r' may conflict with other tools. Package loading adds startup time.
HISTORY
littler was created by Dirk Eddelbuettel and Jeff Horner in 2006 to provide a proper scripting interface for R.
