From: Gabor Grothendieck <ggrothendieck_at_myway.com>

Date: Sat 03 Jul 2004 - 11:20:40 EST

R-help@stat.math.ethz.ch mailing list

https://www.stat.math.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html Received on Sat Jul 03 11:26:26 2004

Date: Sat 03 Jul 2004 - 11:20:40 EST

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
*

R-help@stat.math.ethz.ch mailing list

https://www.stat.math.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html Received on Sat Jul 03 11:26:26 2004

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