#!/bin/sh

usage()
{
	echo "usage: file ..." 1>&2
	exit 1
}

[ "$1" ] || usage
files=
while [ "$1" ]; do
	[ "$files" ] && files="$files, "
	files="$files\"$1\""
	shift
done

gnuplot -persist <<EOF
set yrange [-94:-10]
set ylabel "RX-TX power (dBm)"
set xlabel "Frequency (MHz)"
set style data lines
plot $files
EOF