# set terminal pngcairo  transparent enhanced font "arial,10" fontscale 1.0 size 600, 400 
# set output 'nonlinear4.1.png'
unset border
unset key
set view 65, 34, 1.00627, 1.41667
set isosamples 20, 20
set style data lines
set style function pm3d
set xyplane at 0
set nomcbtics
unset xtics
unset ytics
unset ztics
set cbtics border in scale 1,0.5 mirror norotate  offset character -0.5, 0, 0 autojustify
set cbtics  norangelimit logscale autofreq 
set cbtics add  (450.000)
set title "set nonlinear cb\nvia log10(z) inv 10**z" 
set title  offset character 0, -3, 0 font "" norotate
set xrange [ -2.00000 : 6.00000 ] noreverse nowriteback
set yrange [ -5.00000 : 5.00000 ] noreverse nowriteback
set zrange [ -50.0000 : 450.000 ] noreverse nowriteback
set cbrange [ 0.100000 : 450.000 ] noreverse nowriteback
set nonlinear cb via log10(z) inverse 10**z 
set palette negative nops_allcF maxcolors 0 gamma 1.5 color model RGB 
set palette cubehelix start 0.5 cycles -1.5 saturation 1
splot 5 + 100.*sin(sqrt(x**2+y**2))/(x**2+y**2)