set isosamples 80
set xlabel 'x'
set ylabel 'y'
set zlabel 'J_0(x^2+y^2)'
splot [-4:4][-4:4] besj0(x**2+y**2) w l

#set ticslevel 0
#set hidden3d
#splot [-4:4][-4:4] besj0(x**2+y**2) w l

#set ticslevel 0
#set pm3d 
#splot [-4:4][-4:4] besj0(x**2+y**2) w pm3d

#set pm3d at bs
#set ticslevel 1.0
#splot [-4:4][-4:4] besj0(x**2+y**2) w pm3d

#set view 30,30
#set ticslevel 0
#set hidden3d
#set pm3d explicit at s
#splot [-4:4][-4:4] besj0(x**2+y**2) w l palette