# set terminal pngcairo transparent enhanced font "arial,10" fontscale 1.0 size 600, 400 # set output 'pm3d.7.png' 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)