Work.gpl

 #!/usr/bin/gnuplot
 #
 # Plot the energy per molecule value.
 # by Asdrubal Lozada Blanco
 # Laboratorio de Química Teórica - UFSCar
 # 2015
 reset
 # color definitions
 set style line 1 lc rgb "#000000" lt 1 lw 0.5
 set style line 2 lc rgb "#949599" lt 1 lw 0.5
 set multiplot layout 2,1
 set ylabel "⟨E⟩ (kcal/mol)"
 set xrange[0:10000] 
 set tmargin 0.5
 set bmargin 0 
 set xtics format""
 #
 plot "energy.dat" u 1:2 w l ls 1 title "⟨E⟩"
 #
 set tmargin 0
 set bmargin at screen 0.15
 set ylabel "σ²(E) (kcal/mol)"
 set xlabel "N•10³"
 set xrange[0:10000] 
 set xtics autofreq
 set xtics format"%g"
 #
 plot "energy.dat" u 1:2 w l ls 2 title "σ²(E)"
 unset multiplot