[R] How to get the normal direction to a plane?
Gabor Grothendieck
ggrothendieck at myway.com
Sat Jul 3 03:20:40 CEST 2004
In R^3 there is a unique answer if the points don't all lie on a line.
See the discussion a few weeks ago on the list available at this thread:
http://tolstoy.newcastle.edu.au/R/help/04/05/1487.html
Also you might want to google for
cross product
Fred <fzh113 <at> hecky.it.northwestern.edu> writes:
:
: Dear All
:
: Maybe the following is a stupid question.
: Assume I have 3 coordinate points (not limited to be in 2D or 3D space)
: a, b, c.
: It is known that these 3 points will define a plane.
: The problem is how to get the normal direction that is orthogonal to
: this plane.
:
: Is there an easy way to calculate it using the values of a, b, and c?
:
: Thanks for any point or help on this.
:
: Fred
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