Re: Manipulate / Space Phasor

*To*: mathgroup at smc.vnet.net*Subject*: [mg92341] Re: Manipulate / Space Phasor*From*: magma <maderri2 at gmail.com>*Date*: Sat, 27 Sep 2008 22:23:55 -0400 (EDT)*References*: <gbl2ve$lvl$1@smc.vnet.net>

With the following code you can display a line from the origin to the curve endpoint. If you want to add an arrow head, you need to "forge" it yourself, as there is no cone primitive AFAIK. Manipulate[ Show[ParametricPlot3D[{Sin[u], Cos[u], u/10}, {u, 0, t}], Graphics3D[Line[{{0, 0, 0}, {Sin[t], Cos[t], t/10}}]]], {t, 1, 20}] Arrow3D functionality is available with Presentations, a high quality 50$ package by David Park available at http://home.comcast.net/~djmpark/DrawGraphicsPage.html HTH On Sep 27, 12:47 pm, Fabian <fabian.uria... at gmail.com> wrote: > Dear Group- > > In this plot: > > Manipulate[ > ParametricPlot3D[{Sin[u], Cos[u], u/10}, {u, 0, t}], {t, 1, 20}] > > Is there a way a to show an Arrow from the origin to the tip of the > curve at all instances of time t? > > Thank you.