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Re: No Show


Use

Show[{top, bot}, PlotRange -> All]

Alternatively, use

Plot3D[{Sqrt[1 - (x^2 + y^2)],
  -Sqrt[1 - (x^2 + y^2)]},
 {x, -1, 1}, {y, -1, 1}]

Or more compactly,

Plot3D[{1, -1} Sqrt[1 - (x^2 + y^2)],
 {x, -1, 1}, {y, -1, 1}]


Bob Hanlon

---- Narasimham <mathma18 at hotmail.com> wrote: 
> Why is the following plot, bot, (with - Sqrt) not Shown along with
> top?
> 
> Why is it treated only as a plot skeleton, so no combining is
> possible?
> 
> bot = Plot3D[-Sqrt[1 - (x^2 + y^2) ] , {x, -1, 1}, {y, -1, 1}]
> top = Plot3D[+Sqrt[1 - (x^2 + y^2) ] , {x, -1, 1}, {y, -1, 1}]
> Show[top, bot]
> 
> TIA
> Narasimham
> 



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