Tektronix emulation
set samples 51, 51 set isosamples 60, 60 set hidden3d back offset 1 trianglepattern 3 undefined 1 altdiagonal bentover set style data lines set title "Mandelbrot function" set xlabel "X axis" set xlabel offset character -3, -2, 0 font "" textcolor lt -1 norotate set ylabel "Y axis" set ylabel offset character 3, -2, 0 font "" textcolor lt -1 rotate by -270 set zlabel "Z axis" set zlabel offset character -5, 0, 0 font "" textcolor lt -1 norotate sinc(u,v) = sin(sqrt(u**2+v**2)) / sqrt(u**2+v**2) compl(a,b)=a*{1,0}+b*{0,1} mand(z,a,n) = n<=0 || abs(z)>100 ? 1:mand(z*z+a,a,n-1)+1 GPFUN_sinc = "sinc(u,v) = sin(sqrt(u**2+v**2)) / sqrt(u**2+v**2)" xx = 6.08888888888889 dx = 1.11 x0 = -5 x1 = -3.89111111111111 x2 = -2.78222222222222 x3 = -1.67333333333333 x4 = -0.564444444444444 x5 = 0.544444444444445 x6 = 1.65333333333333 x7 = 2.76222222222222 x8 = 3.87111111111111 x9 = 4.98 xmin = -4.99 xmax = 5 n = 10 zbase = -1 GPFUN_compl = "compl(a,b)=a*{1,0}+b*{0,1}" GPFUN_mand = "mand(z,a,n) = n<=0 || abs(z)>100 ? 1:mand(z*z+a,a,n-1)+1" splot [-2:1][-1.5:1.5] mand({0,0},compl(x,y),30) set term vttek set out "mandelbrot.tek" replot