set terminal postscript eps color enhanced font "Helvetica,16pt" size 8.6cm,6cm dashlength 2.0 

# common settings
# set log y 10
# set format y "10^{%T}"
set format x "%2g"
set format y "%0.0f"
set tics scale 2
set tics nomirror
set xtics 1
set ytics 25
set xrange [568:571]
set yrange [0:100]

set xlabel "Wavelength {/Symbol l} [nm]"
set ylabel "Normalised transmission [%]"

set label 1 "BPF only" at 568.1, 95
set label 2 "BPF + E2" at 568.1, 80
set label 3 "BPF + E1" at 568.1, 60
set label 4 "BPF + E1 + E2" at 570.1, 95

set arrow 1 from 568.4, 90 to 568.8, 85 lc rgb 'black'
set arrow 2 from 568.5, 75 to 568.9, 70 lc rgb 'green'
set arrow 3 from 568.3, 55 to 568.7, 50 lc rgb 'blue'
set arrow 4 from 570.5, 90 to 569.65, 85 lc rgb 'red'


set output "stack.eps"
plot 'stack.txt' using 1:2 w l lw 3 lt 1 lc rgb 'black'  notitle, \
     "" using 1:3 w l lw 2 lt 1 lc rgb 'blue'  notitle, \
     "" using 1:4 w l lw 2 lt 1 lc rgb 'green' notitle, \
     "" using 1:5 w l lw 3 lt 1 lc rgb 'red'  notitle