# set terminal pngcairo  transparent enhanced font "arial,10" fontscale 1.0 size 600, 400 
# set output 'tics.4.png'
set border 4095 front lt black linewidth 1.000 dashtype solid
set style increment default
set view map scale 1
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  autojustify
set xtics  norangelimit autofreq  textcolor rgb "red" 
set ytics border in scale 3,2 mirror norotate  autojustify
set ztics border in scale 3,2 nomirror norotate  autojustify
set cbtics border in scale 4,2 mirror norotate  autojustify
set rtics axis in scale 3,2 nomirror norotate  autojustify
set title "Modification of tics settings (pm3d map with colorbar)" 
set xlabel "x" 
set xrange [ -15.0000 : 15.0000 ] noreverse nowriteback
set x2range [ * : * ] noreverse writeback
set ylabel "y" 
set yrange [ -15.0000 : 15.0000 ] noreverse nowriteback
set y2range [ * : * ] noreverse writeback
set zrange [ -0.250000 : 1.00000 ] noreverse writeback
set cbrange [ * : * ] noreverse writeback
set rrange [ * : * ] noreverse writeback
set pm3d explicit at b
splot sin(sqrt(x**2+y**2))/sqrt(x**2+y**2) notitle