# set terminal png transparent nocrop enhanced font arial 8 size 420,320 # set output 'surface1.14.png' set dummy u,v set label 1 "This is equal to 1" at 0, 3.2, 1 left norotate back nopoint offset character 0, 0, 0 set arrow 1 from 0, 3, 1 to 0, 0, 1 head back nofilled linetype -1 linewidth 1.000 set samples 51, 51 set isosamples 21, 21 set title "Sinc function" set xlabel "X axis" set xlabel offset character -3, -2, 0 font "" textcolor lt -1 norotate set xrange [ -1.00000 : 1.00000 ] noreverse nowriteback set ylabel "Y axis" set ylabel offset character 3, -2, 0 font "" textcolor lt -1 rotate by 90 set yrange [ -1.00000 : 1.00000 ] noreverse nowriteback set zlabel "Z axis" set zlabel offset character -5, 0, 0 font "" textcolor lt -1 norotate set zrange [ -1.00000 : 1.00000 ] noreverse nowriteback sinc(u,v) = sin(sqrt(u**2+v**2)) / sqrt(u**2+v**2) splot [-5:5.01] [-5:5.01] sinc(u,v)