# set terminal pngcairo  transparent enhanced font "arial,10" fontscale 1.0 size 600, 400 
# set output 'pm3dgamma.1.png'
set view map scale 1
set samples 101, 101
set isosamples 2, 2
set style data lines
set style function pm3d
set xtics border in scale 1,0.5 mirror norotate  offset character 0, -1, 0 autojustify
set xtics  norangelimit 2 
unset ytics
unset ztics
set title "gamma = 2.0" 
set xrange [ -10.0000 : 10.0000 ] noreverse
set cbrange [ -10.0000 : 10.0000 ] noreverse
set palette positive nops_allcF maxcolors 0 gamma 2 gray
unset colorbox
NO_ANIMATION = 1
## Last plot was a multiplot
# saved multiplot
set multiplot layout 4, 1
set palette gamma 0.75
set title "gamma = 0.75"
splot x

set palette gamma 1.0
set title "gamma = 1.0"
splot x

set palette gamma 1.5
set title "gamma = 1.5 (default)"
splot x

set xtics 2 offset 0, -1
set palette gamma 2.0
set title "gamma = 2.0"
splot x

unset multiplot