RE: Simple Plot3D/Function Syntax issue

*To*: mathgroup at smc.vnet.net*Subject*: [mg68598] RE: [mg68566] Simple Plot3D/Function Syntax issue*From*: "Erickson Paul-CPTP18" <Paul.Erickson at Motorola.com>*Date*: Fri, 11 Aug 2006 04:40:12 -0400 (EDT)*Sender*: owner-wri-mathgroup at wolfram.com

I'm not sure why you're assigning an equation to f, but it probably doesn't matter too much. The main issue appears that you're using the variable "e" instead of the exponential function "E". Thus Plot3D[E^-(x^2 + y^2) (x^2 + 2y^2), {x, -3, 3}, {y, -3, 3}] Seems to work well. Perhaps you wanted a function "f" in x and y, which would likely be: f[ x_, y_] := E^-(x^2 + y^2) (x^2 + 2y^2) Which then could be used elsewhere, like: Plot3D[ f[ x, y ], {x, -3, 3}, {y, -3, 3}] -----Original Message----- From: JTolman [mailto:jtolman at gmail.com] To: mathgroup at smc.vnet.net Subject: [mg68598] [mg68566] Simple Plot3D/Function Syntax issue When I enter f = e^-(x^2 + y^2) (x^2 + 2y^2) It gives me a syntax::noinfo error but the output looks like the correct textbook style function. Also, when I try to plot it Plot3D[e^-(x^2 + y^2) (x^2 + 2y^2), {x, -3, 3}, {y, -3, 3}] It of course gives me not machines-size real number errors, which I am assuming have more to do with my original syntax error. I've tried several variations but can't figure out what needs to be corrected.