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easy plane normal vector question
*To*: mathgroup at smc.vnet.net
*Subject*: [mg89690] easy plane normal vector question
*From*: will parr <willpowers69 at hotmail.com>
*Date*: Wed, 18 Jun 2008 04:24:06 -0400 (EDT)
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
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