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