equation of a plane from more than 3 points

[Mike4]

Hi !

I have many points (theorically on the same plane) and I'd like to find the coef a,b,c,d of the plane equation : ax + by + cz + d = 0

I know I have to use the least squares method but I do not know how to do with ipp ?

is it possible ? if yes how ?

thanks a lot

Message Edited by michael@nestor-tech.com on 02-01-2006 03:49 AM

[Vladimir_Dudnik]

Hi,

there is answer from our expert:

IPP Small Matrices domain is really meant for such task solving. The base functions are ippmQRDecomp & ippmQRBackSubst, ippmCrossProduct, ippmDotProduct, ippmGaxpy, ippmL2Norm. I would like to emphasize that IPP MX supports computation for vectors or matrices arrays. It should be more effective to use vector array functions like ippmCrossProduct_vava in such application.

All functions are specially optimized for vector size=3 and matrix size= 3x3.

Please refer to IPP MX manual for interface description and functions calling examples.

Regards,
Vladimir