plotfunc represents a pure imaginary expression i*E
of two variables with a rainbow color depending
on the value of z=E. This gives an easy way to
find points having the same third coordinate.
The first arguments of plotfunc must be i*E instead of E,
the remaining arguments are the same
as for a real 3-d graph (cf 6.2.2)
Input :
Output :
Remark
If you want the graphic in LaTeX, you have to use :
Menu▸print▸Print(with Latex).