Re: Plotting questions

*To*: mathgroup at smc.vnet.net*Subject*: [mg19967] Re: Plotting questions*From*: Jens-Peer Kuska <kuska at informatik.uni-leipzig.de>*Date*: Thu, 23 Sep 1999 23:26:18 -0400*Organization*: Universitaet Leipzig*References*: <7sa448$mb7@smc.vnet.net>*Sender*: owner-wri-mathgroup at wolfram.com

Hi, something like : ParametricPlot3D[ If[t < 10^(1 - g)/(1 - g), {t, g, 0}, {t, g, 10^(1 - g)/(1 - g)}], {g, 0.5, 1}, {t, 0, 10}, AxesLabel -> {"x", "y", ""}, BoxRatios -> {1, 1, 1}, Compiled -> False] ? Regards Jens > I *meant* to use the following example: > Suppose > x(t)=(10^(1-g)-(1-g)*t)^(1/(1-g)) > where 0.5<g<1 (say). > I want to simulate this function x(t) for varying t ... specifically, > 0<=t<=10^(1-g)/(1-g) > so that x(t) remains *real* for all t. For t > t_f := 10^(1-g)/(1-g), > > define x(t)=0. > > What I'd like to do is get a parametric 3d *surface* plot with g, t as two > axis, and x(t) as the third axis. I've struggled with this for a while, > but can't seem to do this using Plot3D (due to the fact that the range of > values for t *cannot* be given as a function of g ... i.e. I must use > > {t,0,10} (say), and *not* > {t,0,10^(1-g)/(1-g)} > > which is what I really want). >