# set terminal pngcairo  transparent enhanced font "arial,10" fontscale 1.0 size 600, 400 
# set output 'pm3d.1.png'
set border 4095 front lt black linewidth 1.000 dashtype solid
set samples 25, 25
set isosamples 20, 20
set style data lines
set title "pm3d demo. Radial sinc function. Default options." 
set xlabel "x" 
set xrange [ -15.0000 : 15.0000 ] noreverse
set ylabel "y" 
set yrange [ -15.0000 : 15.0000 ] noreverse
set zrange [ -0.250000 : 1.00000 ] noreverse
set pm3d implicit at s
NO_ANIMATION = 1
splot sin(sqrt(x**2+y**2))/sqrt(x**2+y**2)