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RE: Plot3D confusion

  • To: mathgroup at smc.vnet.net
  • Subject: [mg38636] RE: [mg38609] Plot3D confusion
  • From: "tgarza01 at prodigy.net.mx" <tgarza01 at prodigy.net.mx>
  • Date: Wed, 1 Jan 2003 03:41:10 -0500 (EST)
  • Reply-to: tgarza01 at prodigy.net.mx
  • Sender: owner-wri-mathgroup at wolfram.com

Just to add to your confusion, in my machine both commands work all right
(Windows XP, Version 4.1). Sorry.

Tomas Garza
Mexico City

Original Message:
-----------------
From: Warren Rogers wrx at cruzio.com
To: mathgroup at smc.vnet.net
Subject: [mg38636] [mg38609] Plot3D confusion


I'm confused here. If I try the following command

Plot3D[Abs[1+(x+Iy)^3],{x,-1.25,1.25},{y,-1.25,1.25},PlotPoints->40,Mesh->Fa
lse,FaceGrids->All]

I get a nice 3D plot of a surface that has dimples where the complex zeros
are.

BUT

If I try the following:

f[x_,y_]:=Abs[1+(x+Iy)^3]

Plot3D[f[x,y],{x,-1.25,1.25},{y,-1.25,1.25},PlotPoints->40,Mesh->False,FaceG
rids->All]

Mathematica refuses to plot it at all giving me at least half a dozed 
incomprehensible error messages. I imagine I'm using some sort of 
wrong convention but damned if I can figure it out.

I'm using Mathematica 3.0 on a Mac clone (PowerTower Pro with G3 
accelerator) running OS 8.6.

I'd be most grateful for any help.

thanks,

Warrne Rogers


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