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Re: No Show


Hello Narasimham,

The problem is that Show uses the Plot settings of the first image.
You will have to specify that you want to display the full plot
range:

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,PlotRange]

That does the trick!
HTH,
Gao Han


----- Original Message ----
From: Narasimham <mathma18 at hotmail.com>
To: mathgroup at smc.vnet.net
Sent: Sunday, 25 May, 2008 6:27:46 PM
Subject: [mg89111] [mg89100] No Show
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
ANarasimham


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