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Re: Plotting a parametric equation

  • To: mathgroup at smc.vnet.net
  • Subject: [mg111550] Re: Plotting a parametric equation
  • From: Bob Hanlon <hanlonr at cox.net>
  • Date: Wed, 4 Aug 2010 07:54:47 -0400 (EDT)
  • Reply-to: hanlonr at cox.net

` is a number mark

You have an undefined parameter, z

Table[ParametricPlot3D[
  {0.5` (x + y), 0.5` (x - y),
   z - 0.5` (x^2 - y^2)},
  {x, -10, 10},
  {y, -10, 10},
  ImageSize -> 300],
 {z, -10, 10, 10}]


Bob Hanlon

---- Mapsread <cw_chw at yahoo.com> wrote: 

=============
Greetings,

I would like to see the graph of u=.5(x+y), v=.5(x-y), w= z - .5(x^2 -
y^2).

I entered this into the command-line of Mathematica:

ParametricPlot3D[{0.5` (x + y), 0.5` (x - y),
  z - 0.5` (x^2 - y^2)}, {x, -1000000, 1000000}, {y, -1000000,
  1000000}]

All I get is a big empty box spanning from -1 to 1 on all sides. Is
there something I need to do to make this work?

TIA

P.S. For some reason, Mathematica changes my "*" symbols to "'"
symbols. Does ' mean multiply?




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