Re: Vector plot in cylindrical coordinates.
- To: mathgroup at smc.vnet.net
- Subject: [mg20288] Re: Vector plot in cylindrical coordinates.
- From: Jens-Peer Kuska <kuska at informatik.uni-leipzig.de>
- Date: Tue, 12 Oct 1999 03:39:28 -0400
- Organization: Universitaet Leipzig
- References: <7tp85v$9ah@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
Hi John,
what means "cylindrical coordinates" ? The vector field f={fx,fy}
depending on
r and phi ? The vector field f={fr,fphi} depending on x and y or
f={fr,fphi} on
r and phi ? Since drawinf fr amd fphi show you allmost nothing I assume
you want
{fx[r,phi],fy[r,phi]} ? the following ma y help you:
PlotVectorField[
r = Sqrt[x^2 + y^2]; phi = ArcTan[x, y];
{r*Cos[2phi], r*Sin[2phi]}, {x, -2, 2}, {y, -2, 2}]
Regards
Jens
"I. Ioannou" wrote:
>
> Hi all,
>
> I want to plot a vector field in cylindrical coordinates. While all the
> packages are there, I don't seem to be able to do this. Would anybody know
> the specific instructions?
>
> I should add that this is a 2d vector field. Such fields are x-y
> plottable with PlotVectorField (or something like that). When I try to
> change coordinate systems with the VectorAnalysis package (again the name
> might be slightly different; I'm not in the office) I don't get the
> plotting package to recognize the new coordinates.
>
> I guess, a solution along these lines or in a somehow different way (e.g.
> plotting streamlines) would work.
>
> Thanks for your help, John
> --
> Ioannis I Ioannou phone: (206)-543-1372
> g-2 group, Atomic Physics fax: (206)-685-0635
> Department of Physics
> University of Washington e-mail: iioannou at u.washington.edu