# set terminal png transparent nocrop enhanced size 450,320 font "arial,8" 
# set output 'pm3d.12.png'
set border 4095 front lt black linewidth 1.000 dashtype solid
set key title "" center
set style histogram clustered gap 2 title textcolor lt -1 lt -1
set view map scale 1
set samples 50, 50
set isosamples 50, 50
unset surface 
set style data pm3d
set style function pm3d
set ticslevel 0
set xtics  norangelimit autofreq 
set ytics  norangelimit autofreq 
set ztics  norangelimit autofreq 
set cbtics  norangelimit autofreq 
set rtics  norangelimit autofreq 
set title "cubehelix color scheme with monotonic intensity\nD A Green (2011) http://arxiv.org/abs/1108.5083" 
set title  offset character 0, 1, 0 font "" norotate
set xlabel "x" 
set xlabel  font "" textcolor lt -1 lt -1 norotate
set x2label  font "" textcolor lt -1 lt -1 norotate
set xrange [ -15.0000 : 15.0000 ] noreverse nowriteback
set ylabel "y" 
set ylabel  font "" textcolor lt -1 lt -1 rotate by -270
set y2label  font "" textcolor lt -1 lt -1 rotate by -270
set yrange [ -15.0000 : 15.0000 ] noreverse nowriteback
set zlabel  font "" textcolor lt -1 lt -1 norotate
set zrange [ -0.250000 : 1.00000 ] noreverse nowriteback
set cblabel  font "" textcolor lt -1 lt -1 rotate by -270
set pm3d implicit at b
set palette cubehelix start 0.5 cycles -1.5 saturation 1
splot sin(sqrt(x**2+y**2))/sqrt(x**2+y**2)