Re: ParametricPlot3D

*To*: mathgroup at smc.vnet.net*Subject*: [mg61721] Re: [mg61693] ParametricPlot3D*From*: Chris Chiasson <chris.chiasson at gmail.com>*Date*: Thu, 27 Oct 2005 05:01:52 -0400 (EDT)*References*: <200510250528.BAA23561@smc.vnet.net> <200510260501.BAA18802@smc.vnet.net>*Sender*: owner-wri-mathgroup at wolfram.com

Wrap ToPlot with Evaluate; that way ParametricPlot receives the list it so desperately wants, but had problems receiving because of its attribute HoldAll... heh On 10/26/05, Maurits Haverkort <Haverkort at ph2.uni-koeln.de> wrote: > Dear all > > I want to plot several surfaces in one plot and used for that > ParametricPlot3D. Everything works fine if I enter the definitions for the > functions inline. If I define however a variable (list) that holds the > different functions it does not work anymore. Does anybody know a way out? > > The functions I want to plot are for example two spherse of unit radia > centered at 000 and 100. (I need in the end to plot funcitons (R[t,f] > centered at different orrigens) > > If I write it inline it works fine > ParametricPlot3D[{{Cos[f] Sin[t], Sin[t] Sin[f], Cos[t]}, {Cos[f] Sin[t] + > 1, Sin[t] Sin[f], Cos[t]}}, {t, 0, 3.1415}, {f, 0, 2 3.1415}]; > > If however I first define my functions and then try to plot: > ToPlot = {{Cos[f] Sin[t], Sin[t] Sin[f], Cos[t]}, {Cos[f] Sin[t] + 1, Sin[t] > Sin[f], Cos[t]}}; > ParametricPlot3D[ToPlot, {t, 0, 3.1415}, {f, 0, 2 3.1415}]; > I get the error: > ParametricPlot3D::ppfun : Argument ToPlot is not a list with three or four > elements. More. > > Since the function I need to plot is a result of a calculation I rather need > to input it as a variable. Any sugestions? > > Thanks, > Maurits > > -- http://chrischiasson.com/contact/chris_chiasson

**References**:**Re: notebook directory***From:*Bill Rowe <readnewsciv@earthlink.net>

**ParametricPlot3D***From:*"Maurits Haverkort" <Haverkort@ph2.uni-koeln.de>