plot   'data_DFT_vdzE_error' using 1:2 smooth cspline notitle lt 2 , "" using 1:2 w p lt 2  title "FCI/vdz"
replot 'data_DFT_vdzE_error' using 1:3 smooth cspline notitle lt 8 , "" using 1:3 w p lt 8  title "FCI+PBE/vdz" 
replot 'data_DFT_vdzE_error' using 1:4 smooth cspline notitle lt 4 , "" using 1:4 w p lt 4  title "FCI+PBEot/vdz" 
set terminal eps linewidth 3
set output "DFT_vdzE_error.eps"
replot