# set terminal pngcairo transparent enhanced font "arial,10" fontscale 1.0 size 600, 400 # set output 'contourfill.4.png' set key title "&{----} z = x^2 + y^2(1-x)^3" enhanced center set key inside right top vertical Right reverse enhanced autotitle nobox set key noinvert samplen 0.1 spacing 1 width 0 height 0 set view map scale 1 set samples 51, 51 set isosamples 51, 51 set contour base set cntrlabel onecolor format '%8.3g' font '' start 5 interval 20 set cntrparam cubicspline set cntrparam levels 9 set cntrparam levels incremental -20,5 set contourfill cbtics set xyplane relative 0 set xtics border in scale 0,0 nomirror norotate autojustify set ytics border in scale 0,0 nomirror norotate autojustify set ztics border in scale 0,0 nomirror norotate autojustify set cbtics border in scale 0,0 mirror norotate autojustify set cbtics norangelimit -20.0000,5 ,20.0000 set rtics border in scale 0,0 nomirror norotate autojustify set title "set view map; splot with contourfill + contour lines" set trange [ * : * ] noreverse nowriteback set urange [ * : * ] noreverse nowriteback set vrange [ * : * ] noreverse nowriteback set xrange [ -1.00000 : 5.00000 ] noreverse nowriteback set x2range [ * : * ] noreverse writeback set yrange [ -3.00000 : 3.00000 ] noreverse nowriteback set y2range [ * : * ] noreverse writeback set zlabel "Z " set zlabel offset character 1, 0, 0 font "" textcolor lt -1 norotate set zrange [ -25.0000 : 25.0000 ] noreverse nowriteback set cbrange [ -21.0000 : 21.0000 ] noreverse writeback set rrange [ * : * ] noreverse writeback set lmargin at screen 0 set bmargin at screen 0 set pm3d interpolate 1,1 flush begin noftriangles border retrace linewidth 1.000 dashtype solid corners2color mean set palette positive nops_allcF maxcolors 0 gamma 1.5 viridis set colorbox vertical origin screen 0.9, 0.2 size screen 0.05, 0.6 front noinvert bdefault unset colorbox sinc(x) = (x==0) ? 1.0 : sin(x) / x f(x,y) = sinc( sqrt(x*x + y*y) ) g(x,y) = x**2 + y**2 * (1 - x)**3 NO_ANIMATION = 1 splot g(x,y) with contourfill notitle, g(x,y) nosurface lt black title "Contour levels Δz = 5"