Re: Plotting a x,y,z function

*To*: mathgroup at smc.vnet.net*Subject*: [mg98690] Re: [mg98646] Plotting a x,y,z function*From*: DrMajorBob <btreat1 at austin.rr.com>*Date*: Thu, 16 Apr 2009 04:15:46 -0400 (EDT)*References*: <200904150859.EAA07975@smc.vnet.net>*Reply-to*: drmajorbob at bigfoot.com

That's not Mathematica syntax... it's YOUR math problem. If you don't know what r is about, how could we possibly know? That said, it's POSSIBLE you want r^2 to be x^2 + y^2. Bobby On Wed, 15 Apr 2009 03:59:44 -0500, chem_chick <raeanne.napoleon at gmail.com> wrote: > I needed help plotting the following function: > > f[x_,y_,z_] = (x^2+y^2+z^2) e^-(r^2/2) > > ContourPlot3D[(x^2 + y^2 - z^2) Exp[-r^2/2], {x, -10, 10}, {y, -10, > 10}, {z, -10, 10}] > > does not work because it doesn't understand what r (radius) is....what > is the keyword/whatever for radius? Or do I have to define r in terms > of x,y,z somehow?! Help with syntax will be great! > > Thanks! > -- DrMajorBob at bigfoot.com

**References**:**Plotting a x,y,z function***From:*chem_chick <raeanne.napoleon@gmail.com>