# set terminal pngcairo  transparent enhanced font "arial,10" fontscale 1.0 size 600, 400 
# set output 'pm3dgamma.6.png'
set style increment default
set view map scale 1
set samples 101, 101
set isosamples 2, 2
set style data pm3d
set style function pm3d
set xtics  norangelimit 2
unset ytics
unset ztics
set title "gamma = 2.0" 
set xrange [ -10.0000 : 10.0000 ] noreverse nowriteback
set x2range [ * : * ] noreverse writeback
set yrange [ * : * ] noreverse writeback
set y2range [ * : * ] noreverse writeback
set zrange [ * : * ] noreverse writeback
set cbrange [ -10.0000 : 10.0000 ] noreverse nowriteback
set rrange [ * : * ] noreverse writeback
set pm3d implicit at b
set palette positive nops_allcF maxcolors 0 gamma 2 gray
splot x