#!/usr/bin/gnuplot -p
plot  \
	"/tmp/rnd.dat" using 1:2 w l t "std-rand" lt rgb "green" \
	,"/tmp/rnd.dat" using 1:3 w l t "mod-rand" lt rgb "blue" \
	, "/tmp/rnd.dat" using 1:4 w l t "prop-rand" lt rgb "red" \