#!/bin/bash
set -e

if [ ! -f ${BART_TOOLBOX_PATH}/bart ] ; then

	if [ -f ${TOOLBOX_PATH}/bart ] ; then
		BART_TOOLBOX_PATH=${TOOLBOX_PATH}
	else
		echo "\$BART_TOOLBOX_PATH is not set correctly!"
		exit 1
	fi
fi

if [ $# -lt 3 ] ; then

	echo "Usage: $0 <input1> <input2> <output>" >&2
	echo "Subtract <input1> from <input2> and save in <output>" >&2
	exit 1
fi

${BART_TOOLBOX_PATH}/bart saxpy -- -1. $1 $2 $3

