# set terminal pngcairo transparent enhanced font "arial,10" fontscale 1.0 size 600, 400 # set output 'pm3dcolors.3.png' set format cb "%3.1f" unset key set style increment default set view map scale 1 set samples 101, 101 set isosamples 2, 2 set style data pm3d set style function pm3d set xtics norangelimit 2 unset ytics unset ztics set cbtics norangelimit 0.1 set title "set palette defined (0 0 0 0, 1 0 0 1, 3 0 1 0, 4 1 0 0, 6 1 1 1)" set xrange [ -10.0000 : 10.0000 ] noreverse nowriteback set x2range [ * : * ] noreverse writeback set yrange [ * : * ] noreverse writeback set y2range [ * : * ] noreverse writeback set zrange [ * : * ] noreverse writeback set cbrange [ 0.00000 : 1.00000 ] noreverse nowriteback set rrange [ * : * ] noreverse writeback set pm3d explicit at b set palette defined ( 0 0 0 0, 0.1667 0 0 1, 0.5 0 1 0,\ 0.6667 1 0 0, 1 1 1 1 ) g(x)=x f(x)=(x+10)/20 splot f(x)