set output "4plot.ps"
set terminal postscript portrait color 
set multiplot
set border 3
set xtics nomirror
set ytics nomirror 

set size 1,0.25
set origin 0,0.75
set xlabel "Time"
set ylabel "Packets/unit time"
plot 'attrace' notitle w lines 

set size 1,0.25
set origin 0,0.5
set xlabel "Lag"
set ylabel "Autocorrelation"
plot 'Autocorrelation' notitle w lines 

set size 1,0.25
set origin 0,0.25
set xlabel "Frequency"
set ylabel "psd"
plot 'psd' notitle w lines 

set size 1,0.25
set origin 0,0
set xlabel "Frequency"
set ylabel "cpsd"
plot 'cpsd' notitle w lines  
