#!/usr/bin/gnuplot

#set terminal postscript enhanced
#set output "rychlost-ionu.ps"
set terminal postscript eps enhanced 30
set output "rychlost-ionu.eps"
set encoding iso_8859_1

set key left

set noytics
set noxtics

set label "v(t)" at 6,2
set label "z(t)" at 6,5
set label "v(t), z(t)" at 0.5,9

plot [0:10]	"rychlost-ionu.dat"	using 1:4			notitle with lines 1, \
			""					using 1:($3 * $1)	notitle with lines 2