# set terminal pngcairo  background "#ffffff" enhanced font "arial,10" fontscale 1.0 size 600, 400 
# set output 'tics.4.png'
set border 4095 front linetype -1 linewidth 1.000
set view map
set samples 50, 50
set isosamples 50, 50
set style data pm3d
set style function pm3d
set mxtics
set xtics border out scale 3,2 mirror norotate  offset character 0, 0, 0 autojustify
set xtics autofreq  norangelimit textcolor rgb "red" 
set ytics border in scale 3,2 mirror norotate  offset character 0, 0, 0 autojustify
set ztics border in scale 3,2 nomirror norotate  offset character 0, 0, 0 autojustify
set cbtics border in scale 4,2 mirror norotate  offset character 0, 0, 0 autojustify
set rtics axis in scale 3,2 nomirror norotate  offset character 0, 0, 0 autojustify
set title "Modification of tics settings (pm3d map with colorbar)" 
set xlabel "x" 
set xrange [ -15.0000 : 15.0000 ] noreverse nowriteback
set ylabel "y" 
set yrange [ -15.0000 : 15.0000 ] noreverse nowriteback
set zrange [ -0.250000 : 1.00000 ] noreverse nowriteback
set pm3d explicit at b
splot sin(sqrt(x**2+y**2))/sqrt(x**2+y**2) notitle