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Solid bounded by given region.

Libby Mui
Posted 11 years ago

Why can't Wolfram do this: plot solid bounded by (z=0, z=4(?(X^2+y^2)), and (?(X^2+y^2))=2) ? Am I missing an app or widget somewhere? Please and thanks!
POSTED BY: Libby Mui
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Am I missing an app or widget somewhere?

No, what you're missing is called syntax, not widget

RegionPlot3D[0 <= z >= 4 Sqrt[x^2 + y^2] && (x^2 + y^2) <= 4, 
{x, -2.1, 2.1}, {y, -2.1, 2.1}, {z, -.1, 8.1}, PlotPoints -> 35, 
 PlotRange -> All, PlotStyle -> Directive[Yellow, Opacity[0.8]], 
 PerformanceGoal -> "Quality"]
POSTED BY: Udo Krause
POSTED BY: David Reiss
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