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Re: Combining VectorPlot3D and ParametricPlot3D

  • To: mathgroup at smc.vnet.net
  • Subject: [mg114049] Re: Combining VectorPlot3D and ParametricPlot3D
  • From: Virgil Stokes <vs at it.uu.se>
  • Date: Mon, 22 Nov 2010 07:36:26 -0500 (EST)

On 21-Nov-2010 00:24, Helen Read wrote:
> On 11/20/2010 6:12 AM, rscott wrote:
>> Hello,
>>
>> I'm trying to show a circle in a vector field in R^3.
>>
>> Here's my vector field:
>>
>> vectorfield01 = VectorPlot3D[{y, -x, 0}, {x, -2, 2}, {y, -2, 2}, {z,
>> -2, 2},
>>    VectorScale ->   0.1,
>>    VectorPoints ->   {9, 9, 5}]
>>
>> Here's my circle:
>>
>> circle01 = ParametricPlot3D[{Cos[t], Sin[t], 2}, {t, 0, 2 \[Pi]},
>>    PlotStyle ->   Directive[Thick, Black],
>>    PlotRange ->   {{-2, 2}, {-2, 2}, {-2, 2}}]
>>
>> Each of these individually gives me what I want, but when I try
>>
>> Show[circle01, vectorfield01]
>>
>> I get the error message
>>
>> Show::gcomb: Could not combine the graphics objects in Show[\!\(\*
>>
>> I've tried all kinds of combinations with Graphics3D[ ] etc.
>>
>> Any help would be appreciated!
> It works fine for me. Try it in a fresh session.
>
I did a copy-and-paste of the above code into Mathematica 8 and it worked fine 
for me also. :-)

--V



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