       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).
>

```

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