update

examples/Haldane_model/bulkek_plane.gnu0

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+set encoding iso_8859_1
+#set terminal  postscript enhanced color
+#set output 'bulkek_plane.eps'
+set terminal  png truecolor enhanced size 1920, 1680 font ",36"
+set output 'bulkek_plane.png'
+set palette rgbformulae 33,13,10
+unset key
+set pm3d
+set origin 0.2, 0
+set size 0.8, 1
+set border lw 3
+#set xtics font ",24"
+#set ytics font ",24"
+set size ratio -1
+set ticslevel 0
+unset xtics
+unset ytics
+set view 80,60
+set xlabel "k_1"
+set ylabel "k_2"
+set zlabel "Energy (eV)" rotate by 90
+unset colorbox
+set autoscale fix
+set pm3d interpolate 4,4
+splot 'bulkek_plane.dat' u 4:5:7 w pm3d, \
+      'bulkek_plane.dat' u 4:5:8 w pm3d