# plot parameter for sp720.f
unset logscale y
  set xlabel 'x'
  set ylabel 'Probability'
  set xrange[-60:60]
  set yrange[1e-6:0.05]
  set grid
plot 'sp720.dat' using 2:4 with histeps, \
     'sp720.dat' using 2:5 with lines lw 1