Re: [Gnuplot-info] 3D figures in coordinate system

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Carles Pina i Estany wrote:

> sphere(x,y)=(1-x**3-y**3)**(1/3)

The (1/3) thing is your biggest problem.  Read "help expression" to 
understand why

   sphere(x,y)=(1-x**3-y**3)**(1.0/3)

works better.

> Usually it is difficult to adjust the position of each figure
> appropriately. There is no easy way to determine the values of  origin ,
> and you have to do it by "trial-and-error".

The most important clue you need here is "help parametric"