/tools/plotting/r_wrapper.sh

 1#!/bin/sh
 2
 3### Run R providing the R script in $1 as standard input and passing 
 4### the remaining arguments on the command line
 5
 6# Function that writes a message to stderr and exits
 7function fail
 8{
 9    echo "$@" >&2
10    exit 1
11}
12
13# Ensure R executable is found
14which R > /dev/null || fail "'R' is required by this tool but was not found on path" 
15
16# Extract first argument
17infile=$1; shift
18
19# Ensure the file exists
20test -f $infile || fail "R input file '$infile' does not exist"
21
22# Invoke R passing file named by first argument to stdin
23R --vanilla --slave $* < $infile