set term postscript eps enhanced
set size 0.6,1.0
set zero 1e-20

set mxtics 3
set xtics 0,30
set xlabel "{/Symbol q}_{c.m.} [deg]"
set xrange [ 0 : 180 ]

set logscale y
set ylabel "d^2{/Symbol s}/dEd{/Symbol W} [mb/MeV sr]" 2,0
set yrange [1e-4: 10]
set mytics  10
set format y "10^{%L}"

set linestyle 1 lt 1 lw 1
set linestyle 2 lt 2 lw 1
set linestyle 3 lt 3 lw 1
set linestyle 4 lt 4 lw 1
set linestyle 5 lt 5 lw 1
set linestyle 6 lt 6 lw 1
set linestyle 7 lt 7 lw 1
set linestyle 8 lt 8 lw 1
set linestyle 9 lt 9 lw 1
set linestyle 10 lt 10 lw 1
set linestyle 11 lt 1 lw 3
set linestyle 12 lt 6 lw 3
set linestyle 13 lt 2 lw 3

set key right top spacing 1.0

set output "ddx15.eps"
plot "ddx15.dat" i 1:1 u 1:2       ti "one-step" w l linestyle 12,\
     "ddx15.dat" i 1:1 u 1:3       ti "two-step" w l linestyle 13,\
     "ddx15.dat" i 1:1 u 1:($2+$3) ti "total"    w l linestyle 11,\
     "ddx15.dat" i 0:0 u 1:2       ti "{/Symbol L}=0" w l linestyle 1,\
     "ddx15.dat" i 0:0 u 1:3       ti             "1" w l linestyle 2,\
     "ddx15.dat" i 0:0 u 1:4       ti             "2" w l linestyle 3,\
     "ddx15.dat" i 0:0 u 1:5       ti             "3" w l linestyle 4,\
     "ddx15.dat" i 0:0 u 1:6       ti             "4" w l linestyle 5,\
     "ddx15.dat" i 0:0 u 1:7       ti             "5" w l linestyle 6,\
     "ddx15.dat" i 0:0 u 1:8       ti             "6" w l linestyle 7,\
     "ddx15.dat" i 0:0 u 1:9       ti             "7" w l linestyle 8,\
     "ddx15.dat" i 0:0 u 1:10      ti             "8" w l linestyle 9,\
     "ddx15.dat" i 0:0 u 1:11      ti             "9" w l linestyle 10

pause -1

ddx15.png