set term postscript color enhanced 'Times-Roman' 22
set output 'beta_eta_compare.ps'
set grid
set key right
set xlabel 's [m]'
set ylabel '{/Symbol b}[m]'
set yrange [0:60]
set ytics nomirror
plot 'beta_eta_18mm_WG_inf.dat' u 1:2 w l lc 1 lw 1.5 t '{/Symbol b}_x(WG-inf-map)',\
'' u 1:3 w l lt 2 lc 1 lw 1.5 t '{/Symbol b}_y(WG-inf-map)', 'beta_eta_18mm_uni_inf.dat' u 1:2 w l lt 1 lc 3 lw 1.5 t '{/Symbol b}_x(unif-inf-map)',\
'' u 1:3 w l lt 2 lc 3 lw 1.5 t '{/Symbol b}_y(unif-inf-map)',\
'beta_eta.dat' u 2:3 w l lt 1 lc -1 lw 1.5 t '{/Symbol b}_x(quad)',\
'' u 2:4 w l lt 1 lc -1 lw 1.5 t '{/Symbol b}_y(quad)'