set term post enha colo 20
set out 'pdisp.eps'

set xlabel 'q'
set ylabel '{/Symbol n} (THz)'
set xtics ("{/Symbol G}" 0, "M" 0.707107, "K" 0.942809, "{/Symbol G}" 1.68817)
set xr [0:1.68817]
set yr [0:70]
set key at 3.0,8.2
set grid xtics lt 9

plot './pdisp.dat'   u 4:5  w lp lt 1 pt 7 ps 0.8 t '',\
     ''              u 4:6  w lp lt 1 pt 7 ps 0.8 t '',\
     ''              u 4:7  w lp lt 1 pt 7 ps 0.8 t '',\
     ''              u 4:8  w lp lt 1 pt 7 ps 0.8 t '',\
     ''              u 4:9  w lp lt 1 pt 7 ps 0.8 t '',\
     ''              u 4:10 w lp lt 1 pt 7 ps 0.8 t ''