# set terminal svg size 600,400 dynamic enhanced fname 'arial' fsize 10 mousing name "heatmaps_3" butt solid # set output 'heatmaps.3.svg' set format cb "%4.1f" set view 49, 28, 1, 1.48 set samples 25, 25 set isosamples 50, 50 set ticslevel 0 set cbtics border in scale 0,0 mirror norotate offset character 0, 0, 0 autojustify set title "4D data (3D Heat Map)\nIndependent value color-mapped onto 3D surface" set title offset character 0, 1, 0 font "" norotate set xlabel "x" set xlabel offset character 3, 0, 0 font "" textcolor lt -1 norotate set xrange [ 5.00000 : 35.0000 ] noreverse nowriteback set ylabel "y" set ylabel offset character -5, 0, 0 font "" textcolor lt -1 rotate by -270 set yrange [ 5.00000 : 35.0000 ] noreverse nowriteback set zlabel "z" set zlabel offset character 2, 0, 0 font "" textcolor lt -1 norotate set pm3d implicit at s set colorbox user set colorbox vertical origin screen 0.9, 0.2, 0 size screen 0.03, 0.6, 0 front noborder Z(x,y) = 100. * (sinc(x,y) + 1.5) sinc(x,y) = sin(sqrt((x-20.)**2+(y-20.)**2))/sqrt((x-20.)**2+(y-20.)**2) color(x,y) = 10. * (1.1 + sin((x-20.)/5.)*cos((y-20.)/10.)) GPFUN_Z = "Z(x,y) = 100. * (sinc(x,y) + 1.5)" GPFUN_sinc = "sinc(x,y) = sin(sqrt((x-20.)**2+(y-20.)**2))/sqrt((x-20.)**2+(y-20.)**2)" GPFUN_color = "color(x,y) = 10. * (1.1 + sin((x-20.)/5.)*cos((y-20.)/10.))" splot '++' using 1:2:(Z($1,$2)):(color($1,$2)) with pm3d title "4 data columns x/y/z/color"