# set terminal pngcairo transparent enhanced font "arial,10" fontscale 1.0 size 500, 350 # set output 'pm3dcolors.22.png' set format cb "%3.1f" unset key set view map set samples 101, 101 set isosamples 2, 2 set style data pm3d set style function pm3d set xtics 2 norangelimit set noytics set noztics set cbtics 0.1 norangelimit set title "set palette model RGB functions\n4*x*(1-theta(x-0.25)), 0.5*theta(x-0.25)*(1-theta(x-0.5)), x" set xrange [ -10.0000 : 10.0000 ] noreverse nowriteback set yrange [ 0.00000 : 1.00000 ] noreverse nowriteback set cbrange [ 0.00000 : 1.00000 ] noreverse nowriteback set pm3d explicit at b set palette functions r(gray), g(gray), b(gray) g(x) = 0.5*theta(x-0.25)*(1-theta(x-0.5)) f(x)=(x+10)/20 theta(x) = x<0 ? 0 : 1 r(x) = 4*x*(1-theta(x-0.25)) b(x) = x GPFUN_g = "g(x) = 0.5*theta(x-0.25)*(1-theta(x-0.5))" GPFUN_f = "f(x)=(x+10)/20" GPFUN_theta = "theta(x) = x<0 ? 0 : 1" GPFUN_r = "r(x) = 4*x*(1-theta(x-0.25))" GPFUN_b = "b(x) = x" splot f(x)