# plot parameter for sp830.f
  set xlabel 'number of Air Shower per 5 minutes'
  set ylabel 'frequency'
  set xrange[*:30]
  set yrange[0:*]
unset logscale y
  set grid
plot 'sp835.dat' using 1:2 with histeps, \
     'sp835.dat' using 1:3 with lines lw 2