# set terminal canvas rounded size 600,400 enhanced fsize 10 lw 1.6 fontscale 1 name "contours_15" jsdir "." # set output 'contours.15.js' set key at screen 1, 0.9 right top vertical Right noreverse enhanced autotitle nobox set style textbox opaque margins 0.5, 0.5 fc bgnd noborder set view 60, 30, 1, 1.1 set samples 25, 25 set isosamples 26, 26 set contour base set cntrlabel format '%8.3g' font ',7' start 5 interval 20 set cntrparam order 8 set cntrparam bspline set style data lines set title "contour of Sinc function" set xlabel "X axis" set ylabel "Y axis" set zlabel "Z " set zlabel offset character 1, 0, 0 font "" textcolor lt -1 norotate set zrange [ -1.00000 : 1.00000 ] noreverse nowriteback splot [-5:5.01] [-5:5.01] sin(sqrt(x**2+y**2)) / sqrt(x**2+y**2)