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Re: Plotting a parametric equation

  • To: mathgroup at smc.vnet.net
  • Subject: [mg111546] Re: Plotting a parametric equation
  • From: Peter Pein <petsie at dordos.net>
  • Date: Wed, 4 Aug 2010 07:40:09 -0400 (EDT)
  • References: <i3bd5l$ph5$1@smc.vnet.net>

Am Wed, 4 Aug 2010 09:50:45 +0000 (UTC)
schrieb Mapsread <cw_chw at yahoo.com>:

> 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?
> 

a value for z

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

Look in the documentation for "Precision".

Cheers,
Peter


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