# set terminal canvas  rounded size 600,400 enhanced fsize 10 lw 1.6 fontscale 1 name "pm3d_7" jsdir "."
# set output 'pm3d.7.js'
set border 4095 front lt black linewidth 1.000 dashtype solid
set style increment default
set view map scale 1
set isosamples 100, 100
unset surface 
set style data pm3d
set style function pm3d
set xyplane relative 0
set title "gray map, negative" 
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 nowriteback
set cbrange [ * : * ] noreverse writeback
set rrange [ * : * ] noreverse writeback
set pm3d implicit at b
set palette negative nops_allcF maxcolors 0 gamma 1.5 gray
splot sin(sqrt(x**2+y**2))/sqrt(x**2+y**2)