       Re: work only with Performance->Speed

• To: mathgroup at smc.vnet.net
• Subject: [mg102774] Re: [mg102764] work only with Performance->Speed
• From: DrMajorBob <btreat1 at austin.rr.com>
• Date: Thu, 27 Aug 2009 06:32:08 -0400 (EDT)
• References: <200908261145.HAA11540@smc.vnet.net>

```You have an extra comma (syntax error!), but this fails, too:

ContourPlot3D[
zz (-1 + 1/(xx^2 + yy^2 + zz^2)^(3/2)), {xx, -2, 2}, {yy, -2,
2}, {zz, -4, 4}, BoundaryStyle -> Red,
RegionFunction -> Function[{x, y, z}, x^2 + y^2 + z^2 >= 1],
PerformanceGoal -> "Quality"]

"Speed" works, but "Quality" does not. It looks like a bug to me.

Bobby

On Wed, 26 Aug 2009 06:45:01 -0500, wiso <gtu2003 at alice.it> wrote:

> This works:
>
> ContourPlot3D[
>  zz (-1 + 1/(xx^2 + yy^2 + zz^2)^(3/2)), {xx, -2, 2}, {yy, -2,
>   2}, {zz, -4, 4},
>  BoundaryStyle -> Red,
>  RegionFunction -> Function[{x, y, z}, x^2 + y^2 + z^2 >= 1],
>  PerformanceGoal -> "Speed"
>  ]
>
> This not:
>
> ContourPlot3D[
>  zz (-1 + 1/(xx^2 + yy^2 + zz^2)^(3/2)), {xx, -2, 2}, {yy, -2,
>   2}, {zz, -4, 4},
>  BoundaryStyle -> Red,
>  RegionFunction -> Function[{x, y, z}, x^2 + y^2 + z^2 >= 1],
>  ]
>
> really I don't understand... (Mathematica 7)
>
>

--
DrMajorBob at yahoo.com

```

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