reset
set term postscript enhanced color font "Helvetica,24pt" dashlength 2.0
#set term pngcairo
set size 1,1
set style arrow 1 nohead lw 2 dashtype 2 lc rgb 'black'
set style arrow 2 heads lw 2 lc rgb 'black'

set output "visibility.eps"
#set title "OTDR trace of the 10-km fibre loop under test"
set xrange [0:135]
set yrange [0:]
set ylabel "Coincidences (s^{-1})"
set xlabel "Half-wave plate angle ({/Symbol \260})"
#set arrow from 0,34.8 to 12,34.8 as 1
#set arrow from 0,27.5 to 12,27.5 as 1
#set arrow from 11,27.5 to 11,34.8 as 2
#set label at 9.7,31 "7dB"

plot 'h.dat' using 1:4 w p pt 7 ps 0.7 lc rgb 'red' notitle, 'v.dat' using 1:4 w p pt 7 ps 0.7 lc rgb 'blue' notitle, 'p.dat' using 1:4 w p pt 7 ps 0.7 lc rgb 'orange' notitle, 'm.dat' using 1:4 w p pt 7 ps 0.7 lc rgb 'black' notitle