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 3.2.2) Input :
If you want the impression or the traduction Latex, you have to use :