Re: VectorPlot on a Circle
- To: mathgroup at smc.vnet.net
- Subject: [mg114784] Re: VectorPlot on a Circle
- From: Patrick Scheibe <pscheibe at trm.uni-leipzig.de>
- Date: Fri, 17 Dec 2010 03:27:44 -0500 (EST)
- References: <ie297c$mrj$1@smc.vnet.net> <201012130852.DAA09458@smc.vnet.net> <201012161049.FAA11856@smc.vnet.net>
Hi,
what about
VectorPlot[{x, y}, {x, -1, 1}, {y, -1, 1},
RegionFunction -> Function[{x, y}, x^2 + y^2 < 1]]
?
Cheers
Patrick
On Dec 16, 2010, at 11:49 AM, Dave Snead wrote:
> Hi,
>
> I'm trying to do a vector plot but confine the vectors to a unit circle.
>
> VectorPlot[
> If[Abs[x^2 + y^2 - 1] == 0, {x, y}, {0, 0}], {x, -1, 1}, {y, -1, 1}]
> only plots a couple of vectors, not the dense set of vectors that I want.
>
> and
> VectorPlot[
> If[Abs[x^2 + y^2 - 1] <.1, {x, y}, {0, 0}], {x, -1, 1}, {y, -1, 1}]
> plots lots of vectors but they're on an annulus rather than a circle.
>
> Is there any way to do this?
>
> Or more generally is there any way to confine the vectors to a curve.
> Or, kicking the dimension up by 1, can VectorPlot3D confine the vectors
> to a surface?
>
> Thanks,
> Dave Snead
>
>
- References:
- Re: vector/matrix indexed from zero
- From: Norbert Marxer <marxer@mec.li>
- VectorPlot on a Circle
- From: "Dave Snead" <dsnead6@charter.net>
- Re: vector/matrix indexed from zero