Plotting questions

*To*: mathgroup at smc.vnet.net*Subject*: [mg19949] Plotting questions*From*: bt585 at FreeNet.Carleton.CA (Michael Chang)*Date*: Wed, 22 Sep 1999 04:11:25 -0400*Organization*: The National Capital FreeNet*Sender*: owner-wri-mathgroup at wolfram.com

Hi again! Sorry, but in my rush, I sent out the *wrong* example regarding my plotting difficulties in an earlier email (about 1 hour ago) today. 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). I suspect that I have to change my definition of x(t) so that it knows that if t>t_f, then x(t) should be 0, so that I can then use a fixed plotrange for t, but I don't know how to do this ... Sorry for any confusion! Thanks again! Mike!