Re: 3D plotting problem

*To*: mathgroup at smc.vnet.net*Subject*: [mg51743] Re: 3D plotting problem*From*: Bill Rowe <readnewsciv at earthlink.net>*Date*: Sun, 31 Oct 2004 01:17:08 -0500 (EST)*Sender*: owner-wri-mathgroup at wolfram.com

On 10/30/04 at 3:47 AM, Henning.Heiberg-Andersen at fi.uib.no (Henning Heiberg-Andersen) wrote: >I find myself unable to make a 3D plot of the atomic 2p orbital >f_z(2p,x,y,z;a)=z*Exp[-a*Sqrt[x^2+y^2+z^2]]. >As far as I can understand, 'ContourPlot3D' is the only option, but >it gives either an empty plot box or a flat sheet. >Can anyone suggest a way out? You did not make it clear exactly what you tried to plot. If it was the expression you posted, then try re-writting your function as f[x_, y_, z_, a_] := z*Exp[-a*Sqrt[x^2 + y^2 + z^2]] Here, I've eliminated the _z from the function name as Mathematica doesn't allow underscore characters in function names f_z is interpeted by Mathematica to be any expression with Head z given a name f, not what you want. Changed the "(" to "[" to corespond to proper Mathematica syntax dropped 2p from the arguements since it does not appear on the rhs added a underscore to all of the other arguments. Using x_ is interpreted by Mathematica as being any valid expression and is given a local name of x Replaced Set ("=") with DelayedSet (":=") -- To reply via email subtract one hundred and four