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I want to plot a vector field F={Fx, Fy, Fz}. However, I only want to plot it in one plane (say, z=0).

When I use VectorPlot3D[{Fx, Fy, Fz}, {x, -1, 1}, {y, -1, 1}, {z, 0, x}], and x=0, I get

VectorPlot3D::plld: "Endpoints for z in {z,0,0} must have distinct machine-precision numerical values."

and when x=0.1, it gives me several layers of vectors, which I do not want.

So the question is: How can I plot a 3D-Vector-Field only in a 2-dimensional plane?

Thanks!!

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VectorPlot3D[{x, y, z}, {x, -1, 1}, {y, -1, 1}, {z, -1, 1}]

enter image description here

Now you can either use ViewPoint

VectorPlot3D[{x, y, z}, {x, -1, 1}, {y, -1, 1}, {z, -1, 1}, 
 ViewPoint -> {0, 0, 200}]

enter image description here

or define a very small z-range

VectorPlot3D[{x, y, z}, {x, -1, 1}, {y, -1, 1}, {z, -0.001, 0.001}]

enter image description here

Grid[{
  VectorPlot3D[{x, y, z}, {x, -1, 1}, {y, -1, 1}, {z, ##},
     VectorColorFunction -> "ThermometerColors",
     PlotTheme -> "Marketing",
     ImageSize -> 300] & @@@
   {{-0.2, -0.199}, {-0.001, 0.001}, {0.199, 0.2}}
  }]

enter image description here

If you dare and have V10 you could also use ClipPlanes:

VectorPlot3D[{x, y, z}, {x, -1, 1}, {y, -1, 1}, {z, -1, 1},
 VectorColorFunction -> "Rainbow",
 VectorStyle -> "Arrow3D",
 PlotTheme -> "Marketing",
 ImageSize -> 600,
 ClipPlanes -> {{0, 0, -10, -5}}]

enter image description here

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  • $\begingroup$ oh very nice, thank you. I tried to restrict the z-region, but i didnt do it symmetric and small enough. This works very nicely for me - i see the 3-dimensional vectors of one plane. thanks! $\endgroup$ – NicoDean Oct 1 '14 at 13:17

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