Re: easy plane normal vector question
- To: mathgroup at smc.vnet.net
- Subject: [mg89712] Re: easy plane normal vector question
- From: Jens-Peer Kuska <kuska at informatik.uni-leipzig.de>
- Date: Wed, 18 Jun 2008 06:41:48 -0400 (EDT)
- Organization: Uni Leipzig
- References: <g3agp3$pjo$1@smc.vnet.net>
- Reply-to: kuska at informatik.uni-leipzig.de
Hi,
{a,b}/Sqrt[a^2+b^2]
should be the normal vector.
Regards
Jens
will parr wrote:
> Dear Math Forum,
>
> sorry but i'm not very good at vector maths, so this is probably a very easy question:
>
> if i have the equation for a plane in the form:
>
> plane = c + ax + by
>
> (for example plane=4.07919+ 0.0764884 x - 0.0632675 y)
>
> as you get if you use the Fit function to fit some 3D data (data) in the following way:
>
> Fit[data,{1, x, y},{x, y}],
>
> How do i calculate the normal vector to this plane?
>
> best wishes,
>
> Will
>