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Re: arrows in the parametric plot

• To: mathgroup at smc.vnet.net
• Subject: [mg123882] Re: arrows in the parametric plot
• From: michael partensky <partensky at gmail.com>
• Date: Mon, 26 Dec 2011 17:31:28 -0500 (EST)
• Delivered-to: l-mathgroup@mail-archive0.wolfram.com
• References: <201112261154.GAA14440@smc.vnet.net>

Thanks, Bob.

I noticed that some of them (say #2 for n =3) are tilted relative to the
trajectory.
Can it be fixed?

Best
MP
On Mon, Dec 26, 2011 at 12:13 PM, Bob Hanlon <hanlonr357 at gmail.com> wrote:

> Manipulate[
>  Module[{m, f, c},
>  m = Ceiling[100/n];
>  f[u_] = {Cos[u], Sin[u], u};
>  c = ParametricPlot3D[f[u], {u, 0, 2 Pi},
>    PlotStyle -> Thick,
>    BoxRatios -> {1, 1, 1}];
>  Show[c, Graphics3D[Arrow /@ Partition[
>      Table[f[u], {u, 0, 2 Pi, 2 Pi/(m*n)}],
>      m]]]],
>  {{n, 4, "Number of\nArrows"}, 1, 10, 1,
>  Appearance -> "Labeled"}]
>
>
> Bob Hanlon
>
> On Mon, Dec 26, 2011 at 6:54 AM, michael partensky <partensky at gmail.com>
> wrote:
> > Hi the group.
> > What is the better way of *putting the arrows in the 3-D parametric
> > plot*showing the direction of a particle moving along the trajectory
> > using
> > *only the built-in functions *?
> > The arrows should be separated  by a selected step along the trajectory
> > (or, say, a chosen time step).
> >
> > Thanks
> > Michael.
>

• References:
  • arrows in the parametric plot
    • From: michael partensky <partensky@gmail.com>